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Добірка наукової літератури з теми "Lot (river)"

Автор: Grafiati

Опубліковано: 31 серпня 2023

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Статті в журналах з теми "Lot (river)"

Brodarič, Petar, Donald Schiozzi, and Željko Smojver. "Analysis of River Cruising with the main focus on Croatia." Journal of Maritime & Transportation Science 53, no. 1 (July 2017): 11–18. http://dx.doi.org/10.18048/5301.

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The topic of this paper concerns the analysis of river cruising in Europe and Croatia in order to explain problems affecting this kind of tourist product. There are a lot of possibilities to use rivers to complete the whole tourist experience, which is a top priority for the Croatian budget. This paper analyzes the current state of river cruising in Croatia, the types of ships used, the different types of users, the main reason for the poor state of river cruising in Croatia, and possible solutions Croatia can introduce in order to revitalize river cruising.

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Barus, Ternala Alexander. "Diversity of Fish in Idanoi River and It’s Relationship to Physical Factors of Water Chemistry." International Journal of Ecophysiology 3, no. 1 (October 21, 2022): 76–95. http://dx.doi.org/10.32734/ijoep.v3i1.10024.

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A river is an area through which a body of water moves from a high place to a low place either through the surface or underground which has an average width equal to or more than 5 meters. One of the rivers in Indonesia is the Idanoi river, located in the North Sumatra region, Ononamolo 1 Lot village, Gunungsitoli Selatan sub-district, Nias. This river is inseparable from human activities which affects the condition of river waters as a habitat for aquatic biota. The purpose of this study was to analyze the diversity of fish species in the river Idanoi and to analyze the physical-chemical factors of waters which correlate with the diversity of fish species in the river Idanoi. This study uses the Random sampling method. The results of the research obtained from the four research stations found 1 class, 5 orders, 7 families and 7 species. The highest density value was found at station 1 with a value of 0.023 ind / m2, fish diversity index ranged from 1.072 - 1.829 and the fish uniformity index ranged from 0.92 to 0.98. DO, BOD5 values and oxygen saturation correlated very strongly with fish diversity in river Idanoi village Ononamolo 1 Lot.

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Kankan Parmikanti, Kankan, Khafsah Joebaedi, and Iin Irianingsih. "MODEL STAR DENGAN BOBOT SERAGAM SEBAGAI PENDETEKSI DEBIT AIR SUNGAI CITARUM." Jurnal Ilmiah Matematika dan Pendidikan Matematika 8, no. 2 (December 30, 2016): 81. http://dx.doi.org/10.20884/1.jmp.2016.8.2.2891.

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Lately when rainfall in West Java is quite high, the problem of flooding caused by overflowing of the river has always been a trending topic of regional leaders. Whatever the causes of flooding, be it because a lot of waste dumped in rivers or due to illegal logging of trees in the forest, the river water discharge increased rapidly, and overflowed into public housing. Based on the above, it should be made a model that can predict the water discharge of the river from time to time in various locations in West Java. In this paper will be presented studies Space Time Auto Regression models STAR (1,1) to model the problem of water discharge some rivers in West Java, which can be useful for predicting the discharge of river water in the future. By using Least Squares Method as predictors for the parameters, as well as assuming a uniform weighting matrix, the result that the water discharge of a river in addition affected by the river water flow at an earlier time, it is also influenced by the discharge of river water around.

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Wang, Liu Yan, You Peng Xu, and Ming Jing Yu. "River System Connectivity Analysis of Wuxi’s Central Urban Area Based on Graph Theory." Applied Mechanics and Materials 212-213 (October 2012): 543–48. http://dx.doi.org/10.4028/www.scientific.net/amm.212-213.543.

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Wuxi City is located in the hinterland of Taihu Basin and an important city in Yangtze River Delta Region with a prosperous economy. In the process of urban development, the river system pattern changes a lot. It has an impact on water environment, water ecology and other fields. The central urban area of Wuxi City was selected as the study area. Based on the river system of three periods: 1960s, 1980s and 2009, the rivers were classified into three levels according to the width of channels. The length, acreage and stream structure parameters were calculated. Then from the view of Graph Theory, river system was expressed as network graph, and the vertices, edges and degree of vertices were analyzed. The results show that the changes of rivers of different levels and lakes are not completely the same, but still appear a decreasing trend in general. The river network density and water surface ratio become smaller. Also the complexity and structure stability of river network weaken. The conclusions that the river evolution tends to be trunk and single, the stream structure is simplified and the connectivity of rivers and lakes reduces are verified by the analysis based on Graph Theory as well.

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Thebault, Jean-Marc, and Azddine Qotbi. "A model of phytoplankton development in the Lot River (France)." Water Research 33, no. 4 (March 1999): 1065–79. http://dx.doi.org/10.1016/s0043-1354(98)00284-x.

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Aina, Nuruk, Emmy Sri Mahreda, Kissinger Kissinger, and Hamdani Fauzi. "ANALISIS PARTISIPASI MASYARAKAT SEMPADAN SUNGAI TAPIN DI KABUPATEN TAPIN TERHADAP KELESTARIAN LINGKUNGA." Jurnal Hutan Tropis 9, no. 2 (August 5, 2021): 321. http://dx.doi.org/10.20527/jht.v9i2.11280.

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The degradation of culture and people's lives leads to the degradation of rivers and water. An alarming condition regarding the declining quality of the river's ecology, which has occurred in many places. A lot of garbage is found in the river, the width of the river is getting shorter because on the river border many people's houses are built on the river, sand mining activities in the river erode the depth of the river so that it has an impact on the quality of river water, fish farming activities and so on. That phenomenon lead to decreasing quality of rivers. The purpose of writing this research is to analyze community participation in the river border towards the environmental sustainability of the Tapin river in Tapin Regency, South Kalimantan. This study used a mixed research method that combines quantitative and qualitative approaches with data collection techniques through interviews with informants, direct observations in the field and distributing questionnaires to respondents. The results showed that the value of community participation on participation in the Tapin River conservation effort was 70.825%, which means that it was included in the participation level of 62.50% - 81.24% declared "participating". However, if viewed from the results of the interviews contained in the questionnaire, it was stated that only 30% participated while 70% of the community admitted that they had never participated in efforts to maintain and preserve the Tapin River.

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EM, Denise, Kadiri MO, Uduak EA, and Iniekpo VE. "Autecology of microalgae in Nsit Ubium river." MOJ Biology and Medicine 8, no. 2 (June 29, 2023): 93–98. http://dx.doi.org/10.15406/mojbm.2023.08.00191.

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Analysis of water such as river and lakes can provide an insight into their composition and potential impact on the environment. Nsit Ubium River is a fresh water body that flows through urban areas in Akwa Ibom state. The locals attached a lot of socio-economic importance to the river, as a result of this a lot of humans generated pollutants find their way into it. Researching on the autecology of microalgae in the river, water and algae sample were collected from the river for the period of four months (October 2021 to January 2022) and analyzed for physiochemical parameters and species diversity using standard procedures. Water samples were collected using 1 litre transparent bottle while microalgae samples were collected by scrapping the attached plants on the river bank into a transparent bottle and preserved with a drop of a mixture of formaldehyde and lugol iodine. pH ranged between (4.1 and 5.8), conductivity between (15 and 153), alkalinity between (5.0 and 5.8), Nitrate between (0.5 and 0.80Mg/L), phosphate between (5.01 and 7.8Mg/L) and dissolve oxygen between (6.27 and 9.22mg/l) were determined. Five divisions of algae comprising of 92 taxa were identified during this study. The division, Bacillariophyta was the most represented division accounting for 80% occurrence and a total of 72 species, this was followed by Chlorophyta with 10%, Euglenophyta (7%), Cyanophyta (2%) which were accounted for 9, 6 and 2 taxa respectively. Dinophyta was the least represented with (1%) and contributed only one taxon. The month of November has the highest number of species with total of 54 taxa while December has the least occurrence (31 taxa). The composition of microalgae in Nsit Ubium River were dominated by diatoms (Bacillariophyta) which are good pollution bio-indicators. The Cyanophyta indicates higher nutrient enrichment which could have been due to runoff from agricultural land or waste water discharge. Therefore, the documented algae in the river could be usedful as a pollutant indicator in assessing pollution status of rivers.

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Mahmudah, Muhlisatul. "Minimizing The Development of Lake at River Meeting Points to Reduce Floods in Jakarta Using the Dominating Set Application." Jurnal Axioma : Jurnal Matematika dan Pembelajaran 4, no. 1 (January 31, 2019): 27–32. http://dx.doi.org/10.36835/axi.v4i1.341.

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One of the theories developed in graph theory is the dominating set. Dominating set is a concept of determining the minimum point on the graph with the provision of a point as dominating set to reach the point that is around it. The smallest cardinality of the dominating set is called the domination number denoted by (G). Given graph G with point V and E side, let D be a subset of V. If each point of VD is adjacent at least one point from D, then D is said dominating set in graph G. Currently a lot of applications from dominating set, one of which is Minimizing the Construction of Lakes at River Meeting Points to Reduce Floods in Jakarta. In this study a river meeting will be rebuilt to select floods in Jakarta. Flooding is a natural disaster which is currently often in Indonesia. Especially in Jakarta. Jakarta is one of the risk areas for flooding in Indonesia and floods that always occur suddenly There are so many ways to reduce them, but that doesn't work. One of the causes of flooding in Jakarta is the overflow of river air. When a patient appears suddenly several rivers that have large currents, air flow will collide at the meeting point. When the river flows, the air will overflow large enough. Therefore, it is important to develop a lake at the river meeting point but it is necessary to make the lake as minimal as possible and also to be efficient. The research application dominates the set of lake developments in each river meeting point in the city. Keywords: dominating set, river, flood

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Qiu, Liang, and Hong Juan Zhai. "An Ecological Compensation Mechanism of Chishui River Water Resources Protection and Research." Applied Mechanics and Materials 685 (October 2014): 463–67. http://dx.doi.org/10.4028/www.scientific.net/amm.685.463.

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Chishui River, a first-order south tributary of upper Yangtze River, extends cross Sichuan, Yunnan and Guizhou provinces and is famous as the “eco-river with a lot of endemic fishes”, “Beauty River with natural scenic landscapes”, “Chinese famous liquors river with Maotai” and “hero river”. According to the existing problems in Ecological Environment of the Chishui River, the ecological compensation mechanism was established and the compensation of the main watershed ecology, ecological compensation object, ecological compensation standards and ecological compensation ways were determined, for protecting the environment requirements of the rare and unique fish and Liquor industry production of Yangtze River.

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Krawczyk, Rafał. "Small-scale spatial analysis of river corridor plants distribution in the San River valley (SE Poland)." Biodiversity Research and Conservation 34, no. 1 (June 1, 2014): 53–64. http://dx.doi.org/10.2478/biorc-2014-0007.

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Abstract Spatial distribution and habitat preferences of 55 river corridor plant species were analyzed on a local scale in the valley of a medium-size regulated river. The analysis was based on the results of a detailed mapping on a 50 km-long section of the Lower San River valley (366 cartogram cells of 1 square km). Selected species were divided into two groups: (1) strictly and (2) loosely confined to river corridors. River corridor plants were found throughout the valley (river channel, active and historical floodplain, older terraces, slopes); however, their frequency was diverse in particular areas. The highest concentrations were observed on the floodplain. Their number decreased towards the border areas of the valley. Species which were less confined to rivers were found more frequently in the valley (one species occupied, on average, 12.9% of grid cells), than plants strictly confined to the river system (one species occupied, on average, 5.9% of grid cells); however, the ranges of species of the second group were more restricted to the Holocene part of the valley, especially to the floodplain. River corridor plants were, ecologically, a highly diversified group. In the San river valley, they were found in riparian forests, pioneer ephemeral communities on the banks of water bodies, dry grasslands, meadows and old river beds; a lot of them grew in ruderal habitats.

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Дисертації з теми "Lot (river)"

Javonena, Anne-Charlotte. "Châteaux et domaines castraux, outils de contrôle des réseaux de communication au Moyen Âge : l'exemple de la vallée du Lot (XIIIe -XVe siècles)." Electronic Thesis or Diss., Université Clermont Auvergne (2021-...), 2022. http://www.theses.fr/2022UCFAL018.

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Pendant longtemps, les relations entre les réseaux de communication et les sites castraux ont été associées à la fiscalité seigneuriale (perception de droits de péage) ou encore à un contexte militaire (en cherchant à bloquer le trafic dans une intention défensive). Toutefois, la coordination des maillages routiers, fluviaux et castraux fait apparaître en creux de nombreuses relations dynamiques entre les territoires, leur organisation économique, politique ou encore sociale. La question décisive revient à intégrer ces nouvelles perspectives à une représentation dynamique de la pratique des territoires pour définir les conditions réelles d'interrelation entre les sites castraux et les réseaux de communication au cours du second Moyen Âge. Le cadre géographique de cette thèse, la vallée du Lot, depuis sa source jusqu'à son confluent sur un parcours de 485 km, permet de considérer la permanence des relations sociales et spatiales dans un rapport réciproque d'organisation et de structuration, caractérisée par une pluralité d'ensembles politiques et de luttes d'influence entre individus. La présence de ces différents acteurs de pouvoir (grands princes territoriaux, seigneuries plus modestes, oligarchie et aristocratie locale), dont les seigneuries et les châteaux, les logis seigneuriaux ou aristocratiques s'imposent le long de cette rivière, peuvent faire dialoguer entre eux les espaces, la politique, les sociétés et l'économie pour ainsi détailler les phénomènes dynamiques qui se rapportent à la structuration viaire, fluviale et castrale des territoires observés. Cette étude est enrichie par le dépouillement de sources écrites collectées, entre autres, dans neuf dépôts d'archives départementales, à la BnF, aux archives nationales ou encore au Public record Office de Londres. Ce travail historique s'intéresse ainsi aux différents acteurs du pouvoir riverains du Lot et à leurs instruments de domination du sol afin de mieux cerner leurs logiques de pouvoir et de gestion territoriale quel que soit leur rang social
For a long time, the relations between communication networks and castral sites have been associated with seigniorial taxation (tolls) or military activities (by stopping the trafic). Nevertheless, the coordination of roads, rivers, waterways and castles make appear many dynamic relationships between territories, their economic, political or social organization. The decisive question is to integrate these new perspectives into a representation of the practice of territories to define the real conditions of interrelationship between castral sites and communication networks during the end of the early medieval period and the late Middle Ages. The geographical framework of this thesis, the Lot valley from its source to its confluence, on a course of 485 kilometers (301 miles), allows us to consider the reciprocal permanence of social and spatial relations characterized by a plurality of political groups and struggles of influence between individuals. These different powers (great territorial princes, modest lordships, oligarchy and local aristocracy), whose seigniories and castral domains obtrude along this river, can make spaces, politics, societies and economy interact together to explain the dynamic phenomena that relate to the road, river and castles of the territories observed. This study is enriched by the analysis of archives collected, in nine departmental archive repositories, at the National Library of France (BnF), at the national archives of France or at the Public Record Office of London. This historical work focuses on the various actors of power bordering the Lot and their instruments of land domination in order to understand their logic of power and territorial management regardless of their social rank

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Angius, Carolyn M. "The Concrete River: Industry, Race, and Green Justice on the Banks of the Los Angeles River." Scholarship @ Claremont, 2013. http://scholarship.claremont.edu/scripps_theses/291.

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Looking at it today, it is hard to believe that the now-concrete river bed was once one of the region’s most important rivers. The Los Angeles River was once framed by wide wetlands, forests of oak trees, and was critical in supporting indigenous, Mexican, Spanish, and early Anglo populations. At first glance, many parts of the Los Angeles River look nothing like a river at all. Belying the river’s historical importance, the river today looks far more like a highway than a naturally occurring body of water. While its current appearance may not reflect its centrality in the city’s history, the Los Angeles River is the reason why Los Angeles is located where it is today.

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Lee, Weifeng Victoria. "Detour : Los Angeles River Speed Cinema." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/57978.

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Thesis (M. Arch.)--Massachusetts Institute of Technology, Dept. of Architecture, 2010.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 158-163).
We live in the culture of speed; everything is on its way to become a faster version of itself tomorrow if it is not already there today. Automobile and cinema are two inventions at the turn of the 20th Century that brought upon entirely new sensations through their unprecedented speed in both physical and representational mobility. However, more than a century later in Los Angeles, a city where cars and movies have been inculcated in the popular imagination, decelerating to a complete halt or even nonexistence is the modus operandi of late. Today's LA. is full of cars with no where to drive them really fast; brimmed with cinematic mementos but no real place to watch a film. It does not help that most of the architecture associated with driving and movie-watching is meant to be experienced when slowed down, not sped up. It is time to pick up the pace. This thesis proposes a new cinema typology that amalgamates the physical speed of cars and the representational speed of films through a re-imagination of the mundane activities of driving and movie-watching in the Flood Control Channel in downtown Los Angeles.
by Weifeng Victoria Lee.
M.Arch.

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Tran, Annie M. "Neustonic Plastic in the Los Angeles River." Scholarship @ Claremont, 2012. http://scholarship.claremont.edu/pomona_theses/54.

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The characterization of neustonic plastic found in the Los Angeles River was completed in this study. 3 water samples were collected from the river on April 30, 2011 in Long Beach, CA using a 0.5 mm manta trawl. The plastic was separated from organic material, divided into 3 class sizes (0.5 mm, 1.4 mm, and 2.44 mm), and identified and sized under a microscope. Plastic was found in all three samples and categorized into seven categories. Paper, plastic, and styrofoam were present in all three samples. Styrofoam contributed the greatest percentage of the plastic found among the samples. Plastic film had the largest mean size.

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Zhang, Lu. "The Lost White Settlers in Michael Crummey's River Thieves." Thesis, Högskolan Kristianstad, Sektionen för Lärarutbildning, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hkr:diva-9215.

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In River Thieves, the white settlers are responsible for the vanishing of the Beothuk which reflects the spiritural loss of the white settlers. The major themes of truth, regret and guilt are discussed in the novel.

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Childs, Erin. "Take Me to the River: Revitalizing LA's Lost Monument." Scholarship @ Claremont, 2012. http://scholarship.claremont.edu/pomona_theses/56.

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The tale of South Korea's Cheonggyecheon River is one to warm an urban environmentalist's heart. Cheonggyecheon runs through the center of Seoul, a bustling metropolis of ten million that has been the capital of Korea since the 14th century. The Japanese were the first to sacrice Cheonggyecheon on the altar of urbanization, turning the River into a sewage system during their 35 year occupation between 1910 and 1945. Already thusvdegraded, it was easy for later administrations to eventually completely cover the river with the Cheonggye Road and Cheonggye Elevated Highway between 1958 and 1976. Cheonggyecheon became an exemplar of the expendability of urban environments in the face of modernization and economic growth, particularly the need for transportation in a quickly developing city. In the early 1990s it was discovered that extensive repair would be necessary to maintain the Highway, and with heavy political leadership of Mayoral Candidate Myung-Bak Lee, now the president of South Korea, the decision was made to restore the river rather than repair the road (Park, 2006).

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Duffin, Jenna. "Effects of Engineered Log Jams on Channel Morphology, Middle Fork of the John Day River, Oregon." Thesis, University of Oregon, 2015. http://hdl.handle.net/1794/19338.

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Engineered log jams (ELJs) were constructed on the Middle Fork of the John Day River in eastern Oregon as part of a large restoration project. These log structures were designed to address many of the restoration goals including creating scour pools, inhibiting bank erosion, creating and maintaining a sinuous river planform, and increasing complexity of fish habitat. This study uses geomorphic change detection techniques to monitor topographic change under and around the 26 log structures in two different river reaches over a six to seven year period. This study finds that the ELJs are remaining stable within the river and maintaining deep pool habitat. The study provides insight into which log structure variables are most related to the patterns and amounts of aggradation and degradation. Understanding the geomorphic changes to the riverbed in response to the placement of the ELJs can influence the design and future effectiveness of ELJs.

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Harley, Craig Michael. "Denitrification Potential of Log Jams on the Sandusky River, Ohio :." Connect to this title online, 2005. http://hdl.handle.net/1811/305.

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Thesis (Honors)--Ohio State University, 2005.
Title from first page of PDF file. Document formattted into pages: contains ii, 15 p.; also includes graphics. Includes bibliographical references (p. 15). Available online via Ohio State University's Knowledge Bank.

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Le, Tran N. (Tran Ngoc). "Rethinking urban streams : opportunities for the Nhieu Loc -- Thi Nghe River." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/44331.

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Thesis (M.C.P.)--Massachusetts Institute of Technology, Dept. of Urban Studies and Planning, 2008.
Includes bibliographical references (p. 109-114).
In the process of rapid expansion, many cities have turned their backs on the rivers that helped form and nurture them. Due to the perceived low cost of their existing infrastructure, many rivers have become open or enclosed sewerage and drainage channels. In the past few decades, better scientific understanding and improved management practices have spurred a global river restoration and conservation movement. This thesis studies the paradigm shift from controlling urban streams as landscape features and liabilities to managing whole watersheds as ecosystems and assets. It examines examples of successful river restoration and conservation projects, and uses the lessons learned from these examples to suggest improvements to the management of the Nhieu Loc - Thi Nghe River in Ho Chi Minh City, Vietnam. The Ho Chi Minh City River Environmental Sanitation project of the late 1990s in the Nhieu Loc - Thi Nghe Basin was the first of its kind in Ho Chi Minh City. The project has been hailed as a successful urban regeneration project which exemplifies good practice. This thesis analyses the merits and missed opportunities of these projects and suggests ways to incorporate other ecological and cultural functions into the Nhieu Loc Thi Nghe River, drawing on lessons from successful river restorations in the United States and South Korea.
by Tran N. Le.
M.C.P.

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Gobeau, Nathalie. "Modélisation d'un écoulement gaz-solide dans le riser d'un réacteur catalytique." Ecully, Ecole centrale de Lyon, 1998. http://www.theses.fr/1998ECDL0033.

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Ce travail, réalisé au laboratoire de mécanique des fluides et d'acoustique de l'Ecole Centrale de Lyon en collaboration avec le centre de recherche d'ELF à Solaize (Rhône), a pour objet l'étude de la modélisation de l'écoulement au sein d'un riser, partie du réacteur chimique ou a lieu le craquage catalytique du pétrole en l'absence de réaction chimique, à pression et température ambiantes. En premier lieu sont exposés les enjeux industriels, les principaux mécanismes physiques puis les différents types de modélisation des écoulements diphasiques, en insistant sur les modèles gaz-solide à deux fluides, plus adaptés au cas d'un écoulement relativement dense en particules et aux géométries complexes. Un modèle empirique et un modèle inspiré de la théorie cinétique des gaz faisant intervenir une température granulaire représentant l'énergie d'agitation des particules sont implantés dans le code de calculs commercial phoenics. Des simulations numériques sont réalisées sur un canal plan, puis analysées. Le modèle empirique dépend des constantes et de la géométrie du problème. Le modèle à température granulaire montre un comportement qualitatif satisfaisant. Toutefois l'intégration de mécanismes supplémentaires tels que la modification de la turbulence par les particules devrait permettre d'améliorer les résultats quantitativement. Le dernier chapitre concerne l'étude numérique consacrée plus spécifiquement aux rôles encore mal connus de la turbulence et des collisions entre particules sur la dispersion de celles-ci. Les structures turbulentes cohérentes dans un canal tridimensionnel vertical sont reconstruites à l'aide de la méthode p. O. D. , sans tenir compte de l'influence des particules. Un programme gérant les collisions a été mis au point pour le suivi lagrangien des particules. La dispersion de paires de particules subissant une collision est étudiée et comparée au cas où la collision est négligée.

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Книги з теми "Lot (river)"

Delvit, Philippe. Quand le Lot était navigué...: Histoire & société, XVIIème-XVIIIème siècles. [France]: Ph. Delvit, 1986.

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Graham, Don. Trinity Lutheran Cemetery, Town of Laurentian Hills (Chalk River Village): Chalk River Village, lot 17 & 18, plan 76, Lot 3, Concession 9, Buchanan Township, Renfrew County, Ontario. Pembroke, Ont: Upper Ottawa Valley Genealogical Group, 2000.

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1925-, Graham Don, and Upper Ottawa Valley Genealogical Group, eds. The Old Roman Catholic Cemetery, Our Lady of Good Counsel Church, Town of Deep River, town lot plan #375, part of Block G, Lot 3, Range A, Rolph Township, Renfrew County, Ontario. Pembroke, Ont: Upper Ottawa Valley Genealogical Group, 2000.

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Graham, Don. Forest View Cemetery, St. Andrew's United Church, Town of Laurentian Hills (Chalk River Village), Lot 5, Concession 7, Buchanan Township, Renfrew County, Ontario. Pembroke, Ont: Upper Ottawa Valley Genealogical Group, 2000.

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United States. Bureau of Land Management, ed. River log. Washington, DC (1849 C St., Washington 20240-9998): U.S. Dept. of the Interior, Bureau of Land Management, 2003.

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Lawless River. London: Robert Hale, 2003.

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Let the river flow. Virginia Beach, Va: L.C. Burlage Foundation for Drug and Alcohol Abuse, 1986.

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Wiggin, Kate Douglas Smith. Rose o'the river. Toronto: W. Briggs, 1997.

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Shpanchenko, Vl. Skitalʹt︠s︡y volzhskikh plesov--: Ocherki raznykh let. Kostroma: [s.n.], 2011.

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1925-, Graham D. D., and Upper Ottawa Valley Genealogical Group., eds. Graves and cemeteries located at Chalk River Laboratories, Atomic Energy of Canada Ltd.: Lots 20, 22, and 26, Range B, lot 29, Range A, and lots 5 and 6, Concession 12, Buchanan Township, Renfrew County, Ontario. Pembroke, Ont: Upper Ottawa Valley Genealogical Group, 2002.

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Частини книг з теми "Lot (river)"

Blanc, Gérard, Yvon Lapaquellerie, Noèle Maillet, and Pierre Anschutz. "A cadmium budget for the Lot-Garonne fluvial system (France)." In Man and River Systems, 331–41. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-017-2163-9_35.

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Dauta, Alain, Yvon Lapaquellerie, and Noële Maillet. "Role of the dams on the River Lot on two types of pollution:point-sources (cadmium) and non-point sources (phosphorus)." In Man and River Systems, 325–29. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-017-2163-9_34.

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Smith, Norman. "River Wind." In Mei Niang’s Long-Lost First Writings, 90. London: Routledge, 2023. http://dx.doi.org/10.4324/9781003379560-16.

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Tyrrell, Ian. "A Tale of Two Rivers: The Cooks River and the Los Angeles River in Transnational and Comparative Perspective." In Transnationalism, Nationalism and Australian History, 17–33. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-5017-6_2.

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Sabbion, Paola. "Los Angeles River, USA - Strategies and Techniques." In Urban Sustainability and River Restoration, 106–16. Chichester, UK: John Wiley & Sons Ltd, 2016. http://dx.doi.org/10.1002/9781119245025.ch10.

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Sabbion, Paola. "Los Angeles River, USA - Opportunities and Policies." In Urban Sustainability and River Restoration, 214–26. Chichester, UK: John Wiley & Sons Ltd, 2016. http://dx.doi.org/10.1002/9781119245025.ch19.

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Flick, Robbert. "Excerpts from the San Gabriel River Series." In A Companion to Los Angeles, 461–77. Oxford, UK: Wiley-Blackwell, 2010. http://dx.doi.org/10.1002/9781444390964.ch24.

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Gandy, Matthew. "Auf den Spuren des Los Angeles River." In Infrastrukturen der Stadt, 183–203. Wiesbaden: Springer Fachmedien Wiesbaden, 2016. http://dx.doi.org/10.1007/978-3-658-10424-5_10.

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Schmeier, Susanne. "International River Basin Organizations Lost in Translation? Transboundary River Basin Governance Between Science and Policy." In The Global Water System in the Anthropocene, 369–83. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-07548-8_24.

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"Three Roads and a River." In The Common Lot and Other Stories, 135–48. Ohio University Press, 2016. http://dx.doi.org/10.2307/j.ctv224twhd.16.

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Тези доповідей конференцій з теми "Lot (river)"

Hommadi, Ali, Ali Al-Fawzy, and Fadhil Al-Mohammed. "Flood Forecasting for the Greater Zabb Tributary of Tigris River Using the Probability Techniques." In 4th International Conference on Architectural & Civil Engineering Sciences. Cihan University-Erbil, 2023. http://dx.doi.org/10.24086/icace2022/paper.875.

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The climate change in Iraq from 1933 until 1992 that caused fluctuation of rainfall led to fluctuation of rivers discharge. The increasing of rainfall intensity may cause flood which will impact on human by flooding the neighboring town that lead to damage the houses and human loss; while the decreasing of rainfall causes the scarcity. Therefore accurate forecasting must be done to measure the maximum incomes of discharge by statically analysis in rivers through 56 years to predict the maximum discharge through recurrence interval (T) 10 ,25 ,50 ,100 ,200 ,1000 ,10000, and 105years. In this study the data of Greater Zabb river in Aski Kelek station will be used because of it is not controlled by dams. In this research analyzing river flood is done by utilizing of Gamble, Log person type III., Normal distribution, Log normal distribution, Weibull distribution and GEV(General extreme value) that used by PWM (Power weighted method) distribution. The obtained results of this research were close in all used methods of T = 1000 year except the log normal distribution and GEV, whereas they were higher than the other distributions. Moreover; the outcomes of previous study for suggested dam (Bakhma dams) on the river which are Japanese report 1979, the study of Swiss consultants 1985, study and water resource design 2005 were close to t the outcomes of this research. The many distributions give a lot of probabilities of flood to obtain a clear view of maximum inflow (flood) to river and best design of reservoir.

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Stewart, Deborah, Donna Bodine, Peter Mangarella, and Lynell Garfield. "LID Design for a Residential Lot in the Truckee River Watershed, CA." In International Low Impact Development Conference 2008. Reston, VA: American Society of Civil Engineers, 2008. http://dx.doi.org/10.1061/41009(333)65.

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Braduliene, Jolita, and Raimondas Grubliauskas. "Nitrogen Compunds in the Surface Water Identifying Concentrations and Sources." In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.011.

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The main objective of the surface water monitoring – periodically to conduct water quality testing, to find out the possible sources of pollution in time and to warn population. Water samples for analysis of surface water bodies – rivers Raseika (Raseiniai district, central Lithuania) were taken during the autumn season. The river Raseika belongs to the basin of the river Jura. This river was drained for many times and has a lot of ponds. The treated urban sewage of Raseiniai wastewater treatment plants flows to this river. Also the river Raseika is polluted by population sewage, which are not col-lected and treated. The river Raseika flows through Dubysa Regional Park area, which was established in 1992 to preserve Dubysa erosive valley landscape, natural and cultural heritage values: the picturesque Dubysa valley; significant geomor-phological, hydrographic, cultural, botanical and landscape values, natural ecosystem stability, biota components, unique flora and fauna, natural fish migration routes and spawning grounds. Six points were selected to carry out the monitoring of the river Raseika. The nitrogen concentrations were mostly not corre-sponding to the standards. Most of the ascendances were found in samples where the treated urban sewage of Raseiniai city wastewater treatment plants flows in the river.

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Onitsuka, Kouki, Juichiro Akiyama, Yohei Iiguni, Daisuke Kiuchi, and Noriaki Kawara. "Flow Stability in Pool-and-Weir Fishways, Plunging and Streaming Flows." In ASME/JSME 2007 5th Joint Fluids Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/fedsm2007-37331.

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In Japanese rivers, there are many river constructions, i.e., dams, weirs, drops, for the purpose of flood control. Fishways are river constructions which facilitate migration of fish past dams and weirs. There are a lot of fishway types such as pool-and-weir type, stream type, operation type and so on (see Nakamura, 1995). The pool-and-weir fishway is typical type in Japanese rivers. There are three types of flow regimes in pool-and-weir fishways such as a plunging flow, streaming flow and intermixed flow of plunging and streaming flows. Rajaratnam et al. (1988) proposed a prediction formula of these flow regimes. However, this formula has no physical meaning. Further the accuracy of formula is not high. In this study, the criterion formula, which can predict the flow regime in the pool-and-weir fishway, is suggested semi-theoretically. The experiments were conducted with changing the aspect ratio and discharge in the pool-and-weir fishway. The water surface profiles were measured with a point gauge and also two components velocities were measured with a 2-D electromagnetic current meter. A new criterion formula, which is able to predict the flow formation, is proposed.

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Litvinaitis, Andrius, Lina Bagdžiūnaitė-Litvinaitienė, and Laurynas Šaučiūnas. "The Influence of Neogene Lithology on the Šventoji River Hydrologic Regime." In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.083.

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Due to the recently increasing frequency of extreme changes in river runoff regime, scientific literature deals with the characteristics of runoff formation. Works are carried out in analyzing climate changes and a lot of attention falls on land–use structures. Following thorough analysis of the lithological structure of river basins in separate costal zones, this article aims at evaluating river runoff formation characteristics. The basin lithological factor (sandy, loamy, argillaceous) was calculated based on Quaternary map of Lithuania M 1:200000 and Lithuanian river map M 1:50000 using ArcGis software. In order to carry out more thorough analysis of the influence of lithology in given territories, sections of 0–20 m, 50–200 m, 200–500 m, 500–800 m, 800–1000 m and >1000 m were established, calculating the distance in meters from the riverbank. The period of the years 1984–2014 was analyzed, years with the greatest, average and lowest amounts of precipitation (according to proba-bility) was analysed and relation between the runoff and precipitation was established as well as that with the lithological structure, estab-lished following a derivation of a hydromodule.

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Janković, Marina, and Marija Bakrač. "STABILISATION OF CUT 3, LOT 1, SECTION GORJE POLJE – CARIČINA DOLINA, E-75 HIGHWAY, BELGRADE – NIŠ, PHASE II, REINFORCED SOIL CONSTRUCTION." In GEO-EXPO 2022. DRUŠTVO ZA GEOTEHNIKU U BOSNI I HERCEGOVINI, 2022. http://dx.doi.org/10.35123/geo-expo_2022_4.

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During the execution of works on the E-75 highway, Belgrade-Niš - the border with FYR Macedonia, on section Gornje Polje - Caričina Dolina, LOT 1, on the Cut 3 from km 876+ 325 to km 876 + 825 there was a violation of the stability of a conditionally stable slope that jeopardizes the highway route. According results of extensive geotechnical investigations it is a huge landslide with a complex slip mechanism. Within the Phase II works on the stabilization of the landslide toe in the zone of the left bank of the South Morava River, in the length of 300,50 m, from km 3 + 592 to km 3 + 900.35 (along the axis of the river), or from km 876 + 739,23 to km 876 + 485 (along the axis of the highway) are foreseen. These works consist of constructing the reinforced soil embankment, up to 12.5 m height in the zone of toe of the landslide. The embankment shall contribute to the stabilization of the slope as a ballast, as well as redistribution of the mass after the excavation necessary for the road deviation.

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Vasconcellos, C. R. A., H. R. Oliveira, and J. C. Freitas. "A Historical Case in the Bolivia-Brazil Natural Gas Pipeline: Slope on the Curriola River." In 2004 International Pipeline Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/ipc2004-0400.

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The Bolivia-Brazil Natural Gas Pipeline has 2.600 kilometers since Rio Grande City in Bolivia until Canoas City, in south Brazil. The pipeline crosses a lot of types of geological field and difficult topography. The south spread of the pipeline is the most interesting because of its hard topography combined with the variety of geological materials, such as, colluvium deposits and debris flow areas. Curriola River is located at kilometer 408, north part of Parana State. In this area, the pipeline crosses slopes of 40 degrees of inclination. The mounting was only possible making high cuts to assure the appropriated bendings to the pipe. The high cuts generated high volumes of soil that had no place to be deposited. The construction staff decided to put all the material above the right-of-way, in down part of the slope, near Curriola River. The construction created an artificial colluvium. As well as the most colluvium mass around the world, the Curriola material is a non-resistance material, composed with clay and little rock blocks, with a high porosity. Every year, during the raining seasons, the mass movements generate tension cracks. A superficial drainage system was built in order to prevent these movements but it’s not sufficient because the embankment is more than 5 meters high. Studies have been carried out since the start of the pipeline operation. The most difficult part of the work is the access to the area that makes the whole activity a battle. The first field investigation was conclude in January 2003, composed by SPT tests, piezometer installation and investigation wells. The second part of the story will be composed by inclinometer and strain gauges installation and monitoring, together with laboratory tests with samples of the field. The aim of this paper is to present the site characterization of the Curriola River Slope, together with all the investigation made, including state of stress field, and residual stresses assessment, in order to supply the studies with condensed information for the slope stabilization and gas pipeline integrity.

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Суханов, Е. В. "POLISHED POTTERY OF THE NON-ALAN POPULATION OF THE SALTOVO-MAYAKI CULTURE FROM THE MIDDLE DON RIVER: SELF-PRODUCED OR IMPORTED WARES?" In Вестник "История керамики". Crossref, 2020. http://dx.doi.org/10.25681/iaras.2020.978-5-94375-316-9.79-90.

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Большинство погребальных памятников второй половины VIII – начала X в. на Среднем Дону представлено двумя типами объектов. К первому относятся катакомбные могильники, оставленные аланами. Ко второму типу относятся ямные могильники, которые нельзя связать с каким-то определенным раннесредневековым этническим объединением. Донские аланы, оставившие катакомбные могильники, существенно отличались от носителей ямного обряда своим происхождением, морфологическим обликом и хозяйственно-культурными традициями. Несмотря на эти различия, керамика катакомбных и ямных могильников Среднего Дона имеет много общего как в технологии, так и по морфологии. В статье исследуется вопрос о причинах этого сходства на примере лощеной столовой посуды, которая является одним из наиболее ярких «маркеров» салтово-маяцких древностей. Анализу подвергнуты археологические, антропологические, экспериментальные и этнографические данные. На основании результатов исследования высказано предположение, что население салтово-маяцкой культуры, оставившее на Среднем Дону ямные могильники, не имело собственного производства лощеной посуды, а использовало посуду, изготовленную аланскими гончарами. Institute of Archaeology of Russian Academy of Sciences, Moscow, Russia Most of funeral monuments from the second half of the 8th - beginning of the 10th century in the middle Don River are represented by two types of objects. The first type includes catacomb cemeteries left by the Alans. The second one consists of pit grave cemeteries which can’t be referred to any certain early medieval ethnic association. The Don Alans who left catacomb cemeteries differed significantly from the bearers of the pit grave tradition by their origin, morphological appearance and economical and cultural traditions. In spite of these differences the pottery of the catacomb and pit grave cemeteries in the middle Don River has a lot in common both in technology and morphology. The article analyses the issue of this similarity on the example of polished pottery which is one of the clearest markers of the Saltovo-Mayaki antiquities. The archaeological, anthropological, experimental and ethnographical data were scrutinized. Based on the results of the study it has been suggested that the population of the Saltovo-Mayaki culture which left pit grave cemeteries in the middle Don River didn’t have self-produced polished pottery, but used wares made by the Alan potters.

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García, J. L., J. A. Cuchí, and R. Gairín. "The restoration in the torrent Los Meses, Spain." In RIVER BASIN MANAGEMENT 2007. Southampton, UK: WIT Press, 2007. http://dx.doi.org/10.2495/rm070301.

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Shetty, Devdas, Rakshith Kotian, Steevan Loyd Sequeira, Pavithra N. R., Umesh Pruthviraj, and K. V. Gangadharan. "An Economical Approach Towards Bathymetric Mapping of Shallow Water Basins Using Unmanned Surface Vessel." In ASME 2022 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/imece2022-97015.

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Abstract In recent years, the use of unmanned vehicles has advanced because of a growing number of civil applications such as firefighting or non-military security work, such as surveillance of pipelines etc. The application of these technologies with decreased cost and size has received attention in both civil and military applications. Recent advances in sensors, modeling and simulation and availability of open-source software and hardware for data integration has created an environment of remotely monitoring that was not possible a few years ago. This paper examines a niche cost-effective, portable Unmanned Surface Vessel that has been designed to capture the bathymetric profile of shallow water basins using single beam echosounder. Bathymetry is the measurement of the depth of water in oceans, rivers, or lakes. Bathymetric maps look a lot like topographic maps, which use lines to show the shape and elevation of land features. Today, echo sounders are used to make bathymetric measurements. Global shallow water bathymetry maps offer critical information to inform activities such as scientific research, environment protection, and marine transportation. Accurate mapping of shallow bathymetry is critical for understanding and characterizing coastal environments providing a foundation for measuring underwater light density, mapping and monitoring and planning marine operations and transportation. Methods for estimating shallow water bathymetry have suffered from a variety of trade-offs and limitations. Conventional methods such as shipborne sounding or airborne LiDAR have limited spatial coverage. The unit described in this paper has been designed and has been trained to acquire data in a predefined set path, minimizing the human intervention and the associated errors. A successful trial run was done for mapping the bed profile of the river basin in India. The vessel has been upskilled for capturing sonar data sets, with water quality parameters and soil samples using an automated auger. The vessel functions using the combined various open-source software and hardware tools for data assimilation, while the captured data sets are real-time transferred using IOT to Ground Controlled Station. The tropical river basin chosen is a part of Netravati River located in Dakshina Kannada District, Karnataka, India. This area is a part of the monsoon belt, and the Netravati riverbed is subjected to heavy sand deposition during a part of the year. The data on the excessive sand deposition is of immense value to the district and state administration. This study has been carried out at a frequency of 30 days and is provided as an input during non-monsoon period for district administration for outlining removal of excessive sand deposition monitoring of water quality in the estuarine ecosystem. The work done is a one-of-a-kind pilot study developed in-house using the recent advances seen in the world of open-source platforms. This paper demonstrates a unique application that is of value to the state administration in decision making and in addition contributes to environmental monitoring of the riverbed.

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Звіти організацій з теми "Lot (river)"

Shadurdyyev, G. Analysis of sets of factors affecting the variable flow of the Amu Darya River to create a seasonal prognostic model. Kazakh-German University, December 2022. http://dx.doi.org/10.29258/dkucrswp/2022/53-72.eng.

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The Amu Darya River is a transboundary river whose flow of the river in high-water years reaches up to 108 km3 and in low-water years up to 47 km3 and these are huge fluctuations in the water flow of the river for Tajikistan, Kyrgyzstan, Uzbekistan, Turkmenistan, and Afghanistan, that share water among themselves. The point to consider is that the downstream countries Turkmenistan and Uzbekistan (and possibly Afghanistan in the future) use a lot of water for irrigation, and therefore these countries are the ones most in need of an accurate forecast of the volume of water for the upcoming season. An accurate forecast of the volume of water on the seasonal scale is necessary for better planning of the structure of crops, and subsequently water use in the irrigation of crops. An acceptable solution to this challenge is the construction of an empirical time series model that will be used to predict the seasonal flows of the Amu Darya River to improve the planning and management of water resources in downstream countries. This article considers three important discharge time series in the larger Amu Darya Basin. These include the Kerki Gauge on the Amu Darya, Darband Gauge on Vaksh River and Khorog Gauge on Gunt River. Long-term time series from these stations are available for the study of the development and implementation of time-series based models for the prediction of discharge in the basin. At this stage, we attempt to demonstrate a proof-of-concept which can in a second step convince stakeholders to share such type of discharge data operationally for more effective water allocation between sectors and countries. All our work was carried out with the quantitative tools R/RStudio and QGIS. It can serve as a stepping stone for more complex forecasting models in the future.

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Little, Charles, and David Biedenharn. Technical assessment of the Old, Mississippi, Atchafalaya, and Red (OMAR) Rivers : channel geometry analysis. Engineer Research and Development Center (U.S.), August 2022. http://dx.doi.org/10.21079/11681/45147.

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The Old River Control Complex (ORCC) consists of the Low Sill, Auxiliary, and Overbank structures as features of the Old River Control Structure (ORCS) and the privately owned hydro-electric power plant. Operations of the ORCC manage the hydrologic connectivity between the Mississippi River and the Atchafalaya River/Red River systems. The morphology of the Old, the Mississippi, the Atchafalaya, and the Red Rivers (OMAR) has been influenced by the flow distribution at the ORCC, as well as the accompanying bed sediments. A geomorphic assessment of the OMAR is underway to understand the morphological changes associated with operation of the ORCC. Supporting the geomorphic assessment, a channel geometry analysis herein documents observed adjustments of the affected river channels. Historical hydrographic survey data were used in the Geographic Information System to create river channel geometric models, which inform the analysis. Geometric parameters for cross sections and volume polygons were computed for each survey and evaluated for morphological trends which may be ascribed to the influence of the ORCC. Additionally, the geometric parameters for the Atchafalaya River were used to extend the geometry analyses from the 1951 Mississippi River Commission report on the Atchafalaya River, which was the primary catalyst for the initial development of the ORCS.

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Fertitta, David, Maxwell Agnew, and David Ramirez. Technical assessment of the Old, Mississippi, Atchafalaya, and Red (OMAR) Rivers : HEC-RAS model. Engineer Research and Development Center (U.S.), August 2022. http://dx.doi.org/10.21079/11681/45170.

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Upstream of the confluence of the Red River, Atchafalaya River, and ORCC Outflow Channel are vast low-lying flat areas on both sides of the Lower Red River. During times of high water on the Lower Red—whether from upstream water in the Red or from the ORCC Outflow Channel—enormous amounts of water flow over the natural riverbanks and flood this land. The loss of this water from the river into storage affects the operation of the ORCC, which in turn affects the stages and flows down the Atchafalaya and Mississippi Rivers. An improved understanding of this area and how water is stored during flood events is required to inform ORCC water management operations. Hydraulic analyses provide a basis to assess the changes in water levels, current directions and velocities, and flow rates for the assessment area. The hydraulic model HEC-RAS is used to expand on existing models of the area and to help overcome gaps in data. Understanding the processes of how water leaves the Red River channel, the volume and timing of the water moving into storage, and when the storage area begins to drain, will greatly inform the water managers and operators of the ORCC.

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Dunbar, Joseph. Vertical and horizontal datums used in the Lower Mississippi Valley for US Army Corps of Engineers projects. Engineer Research and Development Center (U.S.), January 2022. http://dx.doi.org/10.21079/11681/42781.

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Six geodetic datums have been used by the US Army Corps of Engineers (USACE), Mississippi River Commission (MRC), for river surveys in the Lower Mississippi Valley (LMV). These legacy elevation datums are the Cairo datum, the Memphis datum, the Mean Gulf Level (MGL), the Mean Sea Level (MSL), the National Geodetic Vertical Datum (NGVD) 1929, and the North American Vertical Datum 1988 (NAVD88). The official geodetic datum currently prescribed by the USACE is NAVD88 (USACE 2010). In addition to these different geodetic datums, hydraulic datums are in use by the USACE for rivers, lakes, and reservoir systems. Hydrographic surveys from the Mississippi River are typically based on a low water pool or discharge reference, such as a low water reference plane (LWRP), an average low water plane (ALWP), or a low water (LW) plane. The following technical note is intended to provide background information about legacy datums used in the LMV to permit comparison of historic maps, charts, and surveys pertaining to the Mississippi River in the LMV. The purpose of this report is to provide background information and history of different published horizontal and vertical datums used for presentation of hydrographic survey data from the Mississippi River. The goal is to facilitate understanding of differences with comparison to other historic surveys for change-detection studies along the river. Conversion values are identified herein for the earlier surveys where appropriate, and methods are presented here to evaluate the differences between earlier and later charts and maps. This report is solely intended to address the LMV area and historic surveys made there. This note is not applicable to areas outside of the LMV. Throughout this technical note, historic hydrographic surveys and data from the Memphis, TN, to Rosedale, MS, reach will be used as examples of features of interest for discussion purposes. Selected historic hydrographic survey sheets at Helena, AR, are included as Plates 1 to 3 (Appendix C) of this document and will be used as examples for discussion purposes.

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Enlow, Holly, Nathaniel Wetzel, David Biedenharn, Christopher Haring, J. Lamport, Kyle Raburn, and Sarah Girdner. Geomorphic assessment of the St. Francis River : between Wappapello Lake and Lake City. Engineer Research and Development Center (U.S.), July 2023. http://dx.doi.org/10.21079/11681/47280.

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The St. Francis River is a complex system that lies in the historic floodplain of the Mississippi and Ohio Rivers. The basin has undergone extensive anthropogenic modifications, including reservoir construction, large-scale channelization, and construction of leveed floodways. Several analyses of available gage data, lidar data, and historical research have provided a picture of geomorphic trends and an overall understanding of the river’s stability. The types of analysis used to determine trends included yearly low stage plots, stage-duration curves, specific gage analysis, water surface slopes, and stream power changes. The results from these analyses were synthesized to develop an overall assessment of the reach. Channel cutoffs resulted in a significant decrease in channel length and sinuosity and triggered geomorphic change throughout the river. Immediately following channelization, dramatic decreasing trends in stage were observed for Fisk and Dekyn’s Store, while St. Francis and Holly Island began to aggrade. Slopes and stream power were significantly increased for the upper portion of the study area and showed a decreasing trend for the lower reach.

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Walshire, Lucas, Joseph Dunbar, and Benjamin Breland. Stability analysis of Old River Low Sill Structure. Engineer Research and Development Center (U.S.), September 2022. http://dx.doi.org/10.21079/11681/45349.

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An updated stability analysis was performed on the Old River Low Sill Structure due to a change in the operating conditions from historic river sedimentation. Sedimentation of the Mississippi River channel since the 1973 spring flood has caused higher river stages at lower discharges. Numerical methods used included nonlinear analysis of pile group stability, seepage analyses, and limit equilibrium methods. The structure’s foundation was compromised during the 1973 flood, and emergency repairs were conducted to prevent scouring and undermining of the foundation by the flood scour. Rehabilitation included the reconstruction of a failed wing wall on the left abutment, rock and riprap fill in the forebay channel, and emergency grouting to fill the scour hole beneath the structure. An operating restriction was emplaced to limit the differential head across the structure due to flood damage. Taking these conditions into account, results from an updated analysis showed that full headwater uplift caused increased tension in the piles, while the increased body load caused increased compressive loads in the piles. Review of piezometric monitoring and the seepage analyses showed that full headwater uplift is unlikely, indicating the foundation grouting adequately sealed the scour hole beneath the structure. Analysis results exhibited lower magnitude compression and tension loads in the piles with design load cases compared to previous analyses. Recommendations from these analyses indicate that increased monitoring and additional investigation may support increasing the differential head limitation.

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Breland, Benjamin, Janet Simms, William Doll, Jason Greenwood, and Ronald Kaufman. Waterborne geophysical investigation to assess condition of grouted foundation : Old River Control Complex – Low Sill Structure, Concordia Parish, Louisiana. Engineer Research and Development Center (U.S.), May 2022. http://dx.doi.org/10.21079/11681/44183.

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The Old River Low Sill Structure (ORLSS) at the Old River Control Complex (ORCC) in Concordia Parish, LA, is a steel pile-founded, gated reinforced-concrete structure that regulates the flow of water into the Atchafalaya River to prevent an avulsion between the Mississippi River and the Atchafalaya River. A scour hole that formed on the southeast wall of ORLSS during the Mississippi River flood of 1973 was remediated with riprap placement and varied mixtures of self-leveling, highly pumpable grout. Non-invasive waterborne geophysical surveys were used to evaluate the distribution and condition of the grout within the remediated scour area. Highly conductive areas were identified from the surveys that were interpreted to consist mostly of grout. Resistive responses, likely representing mostly riprap and/or sediment, were encountered near the remediated scour area periphery. A complex mixture of materials in the remediated scour area is interpreted by the more gradual transitions in the geophysical response. Survey measurements immediately beneath ORLSS were impeded by the abundance of steel along with the structure itself. The survey results and interpretation provide a better understanding of the subsurface properties of ORLSS.

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Ostenaa, Dean, and Daniel O’Connell. Big Lost River Flood Hazard Study. Office of Scientific and Technical Information (OSTI), November 2005. http://dx.doi.org/10.2172/1632315.

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Perkins, Dustin. Invasive exotic plant monitoring at Dinosaur National Monument: Results of the 2019 field season on the Green River, and the third completed monitoring rotation. Edited by Alice Wondrak Biel. National Park Service, December 2021. http://dx.doi.org/10.36967/nrr-2284627.

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Invasive exotic plant (IEP) species are a significant threat to natural ecosystem integrity and biodiversity, and controlling them is a high priority for the National Park Service. The Northern Colorado Plateau Network (NCPN) selected the early detection of IEPs as one of 11 monitoring protocols to be implemented as part of its long-term monitoring program. We also calculated a patch management index (PMI) to quantify the extent and density of invasive patches into a single value that helps identify the scale of the problem. Park managers can use this tool to help prioritize IEP treatment. At Dinosaur National Monument, the NCPN monitors IEPs in the Green and Yampa river corridors. This report summarizes data from monitoring on the Green River in 2019, and monitoring on the Yampa River in 2017, to represent the completion of the third monitoring rotation of the entire river corridor (2002–2005, 2010–2011, 2017–2019). During surveys conducted from June 26 to July 2, 2019, NCPN staff detected 12 priority IEP species and two non-priority species in a 84.6-hectare (209-acre) area along 74.4 kilometers of the Green River above (“upper”) and below (“low-er”) its confluence with the Yampa. A total of 2,535 IEP patches were detected. Of those patches, 24.2% and 15.6% were smaller than 40 m2 on the upper and lower Green River reaches, respectively. The patch management index (PMI) was low or very low for 95.7% of patches on the upper Green River and 90.9% of patches on the lower Green River. Tamarisk (Tamarix sp.), broad-leaf pepperwort (Lepidium latifolium), and yellow sweetclover (Meli-lotus officinalis) were the most widespread species. For the first time, NCPN monitoring detected teasel (Dipsacus sylvestris) on the upper Green River. Yellow sweetclover has increased on all three river reaches during the survey years. Musk thistle (Carduus nutans) was found at considerably lower levels than yellow sweetclover but has also increased on all three river reaches. Leafy spurge is increasing on the lower Green River and Yampa River. Cheatgrass was not monitored in the first rotation, but increased substantially in cover and percent frequency on all three river sections from 2010–2011 to 2017–2019. This increase may be due to a lack of recent high-flow scouring events. The highly regulated upper Green River generally has the highest number of IEPs, while the lower Green River has a moderate amount of IEPs. The largely unregulated flows of the Yampa River continue to result in a lower number of patches per kilometer, lower percent cover, and lower percent frequency than the upper or lower Green River. Network staff will return to the monument in 2022 to begin the fourth monitoring rotation.

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Breland, Benjamin, Lucas Walshire, Maureen Corcoran, Julie Kelley, Janet Simms, Danny Harrelson, and Mansour Zakikhani. Old River Control Complex (ORCC) Low Sill : a literature synthesis. Engineer Research and Development Center (U.S.), March 2023. http://dx.doi.org/10.21079/11681/46630.

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The US Army Corps of Engineers (USACE), New Orleans District (MVN), tasked the US Army Engineer and Research Development Center (ERDC) with assessing the condition of a grouted scour hole located at the southeast wall of the Old River Low Sill Structure (ORLSS) at the Old River Control Complex (ORCC) using noninvasive techniques, such as geophysical surveys and physical models. This special report (SR) combines a scientific literature synthesis of previous research with further geologic interpretation as a first step in the overall task assigned by MVN. The results discussed in this SR will be used to inform the interpretation of geophysical surveys, construction of physical models, and input for the slope stability analyses.

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