Bibliografias temáticas / Floodplain deposition

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Literatura científica selecionada sobre o tema "Floodplain deposition"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 6 de fevereiro de 2022

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Artigos de revistas sobre o assunto "Floodplain deposition"

Manh, N. V., B. Merz e H. Apel. "Sedimentation monitoring including uncertainty analysis in complex floodplains: a case study in the Mekong Delta". Hydrology and Earth System Sciences 17, n.º 8 (1 de agosto de 2013): 3039–57. http://dx.doi.org/10.5194/hess-17-3039-2013.

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Abstract. Quantity and quality of sediment deposition in complex floodplains are affected by many processes that are typically highly spatially and temporally variable and hard to quantify exactly. The main processes in this context are suspended sediment transport dynamics in rivers, floodplain channel interactions, and internal floodplain processes. In consequence, any point measurement of sedimentation in floodplains contains a high degree of uncertainty, both stemming from measurement errors and from the lack of representativeness for a larger area. However, up to now, uncertainty analyses have not been performed as part of publications on floodplain sedimentation data. Therefore the present work illustrates a field sampling strategy aiming at the monitoring of floodplain deposition and spatial variability on a large scale and at the quantification of uncertainties associated to sediment deposition data. The study was performed in the Mekong Delta, being an example for a large and complex floodplain with a high degree of anthropogenic disturbances. We present a procedure for the quantification of the uncertainty associated to the data, based on the design of the monitoring campaign, sampling procedures, and floodplain characteristics. Sediment traps were distributed strategically over the floodplain in clusters of three mat traps representing one monitoring point. The uncertainty originating from collection of the traps from still ponding water is quantified by lab experiments. The overall uncertainty of the deposition samples and the associated nutrient content is quantified in a Monte Carlo simulation and illustrated by uncertainty bounds. For the study area the results show a very high variability of the annual floodplain deposition (2.2–60 kg m−2) with uncertainty bounds ranging from −61 to +129% relative to overall mean deposition of 11.4 kg m−2. No correlations in the spatial distribution of sedimentation in the floodplains could be found. This is caused by the highly complex channel and dike system and the high number of hydraulic structures. Also, no differences in deposition between floodplain compartments protected with high and low dikes could be detected. However, it can be shown that within single floodplain compartments the spatial deposition variability depends on the dike levels and operation and location of hydraulic structures.

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Manh, N. V., B. Merz e H. Apel. "Sedimentation monitoring including uncertainty analysis in complex floodplains: a case study in the Mekong Delta". Hydrology and Earth System Sciences Discussions 10, n.º 1 (11 de janeiro de 2013): 325–73. http://dx.doi.org/10.5194/hessd-10-325-2013.

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Abstract. Quantity and quality of sediment deposition in complex floodplains are affected by many uncertain factors, ranging from suspended sediment transport dynamics in rivers and floodplain channel interactions to internal floodplain processes. In consequence, any point measurement of sedimentation in floodplains contains a high degree of uncertainty calling for a careful analysis of the measured data. However, uncertainty analyses are not documented in publications on floodplain sedimentation data. Therefore the presented work illustrates a field sampling strategy aiming at the quantification of uncertainties associated to sediment deposition data, as well as the spatial variability of sediments deposition on floodplains. The study was performed in the Mekong Delta (MD), being an example for a large and complex floodplain with a high degree of anthropogenic disturbances. We present a procedure for the quantification of the uncertainty associated to the data, based on the design of the monitoring campaign and floodplain characteristics. Sediment traps were distributed strategically over the floodplain in clusters of three mat traps representing one monitoring point. The uncertainty originating from collection of the traps in ponding water is quantified by lab experiments. The uncertainty of a single monitoring point is then quantified in a Monte Carlo simulation, propagating the uncertainty from the different uncertainty sources to final uncertainty bounds of the monitored sediment data. For the case study area, it is shown that there are no correlations in the spatial distribution of sedimentation in floodplains. This can be explained by the highly complex channel and dike system and the high number of hydraulic structures. However, it can be shown that within single floodplain compartments the spatial deposition variability depends on the dike levels and operation and location of hydraulic structures.

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Middelkoop, H. "Heavy-metal pollution of the river Rhine and Meuse floodplains in the Netherlands". Netherlands Journal of Geosciences - Geologie en Mijnbouw 79, n.º 4 (dezembro de 2000): 411–27. http://dx.doi.org/10.1017/s0016774600021910.

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AbstractThe embanked floodplains of the lower Rhine river in the Netherlands contain large amounts of heavy metals, which is a result of many years of deposition of contaminated overbank sediments. The metal pollution varies greatly between the various floodplain sections as well as in vertical direction within the floodplain soil profiles. The present contribution describes the key processes producing the spatial variability of the metal pollution in floodplain soils: (1) spatial patterns of the concentrations and deposition of Cd, Cu, Pb and Zn during a single flood, which have been determined from samples collected after a high-magnitude flood event; (2) the pollution trends of the lower Rhine over the past 150 years, which were reconstructed on the basis of metal concentrations in sediments from small ponds within the floodplain area. During the flood the largest metal depositions (0.03 g/m2 Cd, 0.7 g/m2 Cu, 1.1 g/m2 Pb and 5.0 g/m2 Zn for the Rhine) occurred along the natural levees, decreasing to about one third of these values at larger distance from the river. Deposition of heavy metals occurred since the end of the nineteenth century. Periods of maximum pollution occurred in the 1930s and 1960s, when Cu, Pb and Zn concentrations were about 6–10 times as high as background values.The resulting metal distribution in the floodplain soil profiles is illustrated by means of typical examples. Maximum metal concentrations in floodplain soils vary from 30 to 130 mg/kg for Cu, from 70 to 490 mg/kg for Pb, and from 170 to 1450 mg/kg for Zn. The lowest metal pollution is found in the distal parts of floodplain sections with low flooding frequencies, where average sedimentation rates have been less than about 5 mm/a. The largest metal accumulations occur in low-lying floodplain sections where average sedimentation rates have been more than 10 mm/a.

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Parker, Israel D., Roel R. Lopez, Reema Padia, Meghan Gallagher, Raghupathy Karthikeyan, James C. Cathey, Nova J. Silvy e Donald S. Davis. "Role of free-ranging mammals in the deposition of Escherichia coli into a Texas floodplain". Wildlife Research 40, n.º 7 (2013): 570. http://dx.doi.org/10.1071/wr13082.

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Context The role of wildlife in faecal pollution of water bodies (deposition of Escherichia coli (E. coli)) is not well understood. Current water-quality and land-use planning research largely relies on unreliable wildlife data (e.g. poor sourcing of abundance estimates, population density estimates applied to multiple fundamentally different areas, suspect or insufficiently described data collection techniques) Aims Our goal for the present research was to investigate deposition of E. coli into a floodplain by free-ranging mammals. Objectives of the research were to determine the density of important free-ranging meso- and large mammals in the study area, determine faecal E. coli loads for each species, and evaluate spatial data on species-specific faecal deposition. Methods We conducted our research in south-eastern Texas, USA, on two cattle ranches bisected by Cedar Creek (44-km long). Cedar Creek has elevated E. coli concentrations. We conducted mark–recapture and mark–resight population density estimates (2008/09) for meso- and large mammals in the study areas. We collected faecal samples from all captured wildlife. We also conducted transects through the study area to determine faecal-deposition patterns. Key results We found that raccoons (Procyon lotor), wild pigs (Sus scrofa), Virginia opossums (Didelphis virginiana) and white-tailed deer (Odocoileus virginianus) all had substantial faecal E. coli loads and population densities, thus implying an important role in E. coli deposition into the study floodplain. All species were widely distributed through the floodplain. Conclusions Free-ranging mammals contribute E. coli to floodplains and potentially affect water quality. We determined that four species commonly found in floodplains throughout North America all contributed E. coli to the study floodplain, thus implying mammal E. coli contributions in many locations and this is potentially important for E. coli management. Implications Improved locally specific mammal population estimates and estimates of locally derived E. coli concentration will improve floodplain and water-quality models that often depend on data of various quality. Additionally, our analyses demonstrated the need for continued research into the role of wildlife in E. coli deposition.

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Gordon, Brad A., Olivia Dorothy e Christian F. Lenhart. "Nutrient Retention in Ecologically Functional Floodplains: A Review". Water 12, n.º 10 (4 de outubro de 2020): 2762. http://dx.doi.org/10.3390/w12102762.

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Nutrient loads in fresh and coastal waters continue to lead to harmful algal blooms across the globe. Historically, floodplains—low-lying areas adjacent to streams and rivers that become inundated during high-flow events—would have been nutrient deposition and/or removal sites within riparian corridors, but many floodplains have been developed and/or disconnected. This review synthesizes literature and data available from field studies quantifying nitrogen (N) and phosphorus (P) removal within floodplains across North America and Europe to determine how effective floodplain restoration is at removing nutrients. The mean removal of nitrate-N (NO3−-N), the primary form of N in floodplain studies, was 200 (SD = 198) kg-N ha−1 year−1, and of total or particulate P was 21.0 (SD = 31.4) kg-P ha−1 year−1. Based on the literature, more effective designs of restored floodplains should include optimal hydraulic load, permanent wetlands, geomorphic diversity, and dense vegetation. Floodplain restorations along waterways with higher nutrient concentrations could lead to a more effective investment for nutrient removal. Overall, restoring and reconnecting floodplains throughout watersheds is a viable and effective means of removing nutrients while also restoring the many other benefits that floodplains provide.

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Thonon, I., H. Middelkoop e M. van der Perk. "The influence of floodplain morphology and river works on spatial patterns of overbank deposition". Netherlands Journal of Geosciences - Geologie en Mijnbouw 86, n.º 1 (abril de 2007): 63–75. http://dx.doi.org/10.1017/s0016774600021326.

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AbstractFloodplain topography and related hydraulic patterns of overbank flow constitute a major control on the amounts and patterns of sediment deposition on floodplains. We studied the differences in sediment deposition at two scales along two river branches of the lower River Rhine in the Netherlands: the Waal and IJssel River. Human alterations like levelling and embankment construction have severely impacted the floodplains along the Waal River branch (average discharge: 1500 m3·s‒1), whereas the relatively wide floodplains along the IJssel River (average discharge: 250 m3·s‒1) still exhibit their characteristic ridge-and-swale topography and natural levees. We found that, in general, the amounts of sediment deposited sediment decreases with increasing distance to the sediment source. Clay and organic matter content generally increase with decreasing floodplain elevation. These trends are, however, far less pronounced in the Waal River floodplains than in the IJssel River floodplains. Sediment deposited on the IJssel River floodplains also contains significantly more sand than the sediment deposited on the Waal River floodplains, probably because of the absence of minor embankments along the IJssel River and its higher sinuosity. Furthermore, during inundation the individual Waal River floodplains receive more sediment per unit area than the IJssel River floodplains. At the scale of the river branch, however, the conveyance losses in the Waal River are less than in the IJssel River, because of the larger surface area of the floodplains along the IJssel River relative to its water and sediment discharge during flood events. This discrepancy stresses that both the individual floodplain sections and the total river branch should be taken into account when studying the role of overbank deposition as part of a river’s sediment budget.

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Daskin, Joshua H., Filipe Aires e A. Carla Staver. "Determinants of tree cover in tropical floodplains". Proceedings of the Royal Society B: Biological Sciences 286, n.º 1914 (30 de outubro de 2019): 20191755. http://dx.doi.org/10.1098/rspb.2019.1755.

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Tree cover differentiates forests from savannas and grasslands. In tropical floodplains, factors differentiating these systems are poorly known, even though floodplains cover 10% of the tropical landmass. Seasonal inundation potentially presents trees with both challenges (soil anoxia) and benefits (moisture and nutrient deposition), the relative importance of which may depend on ecological context, e.g. if floods alleviate water stress more in more arid ecosystems. Here, we use remotely sensed data across 13 large tropical and sub-tropical floodplain ecosystems on five continents to show that climatic water balance (i.e. precipitation—potential evapotranspiration) strongly increases floodplain tree cover in interaction with flooding, fire and topography. As predicted, flooding increases tree cover in more arid floodplains, but decreases tree cover in climatically wetter ones. As in uplands, frequent fire reduced tree cover, particularly in wet regions, but—in contrast with uplands—lower elevation and sandier soils decreased tree cover. Our results suggest that predicting the impacts of changing climate, land use and hydrology on floodplain ecosystems depends on considering climate-disturbance interactions. While outright wetland conversion proceeds globally, additional anthropogenic activities, including alteration of fire frequencies and dam construction, will also shift floodplain tree cover, especially in wet climates.

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Yuskar, Yuniarti, Dewandra Bagus Eka Putra e Muhammad Revanda. "Quarternary Sediment Characteristics of Floodplain area: Study Case at Kampar River, Rumbio Area and Surroundings, Riau Province". Journal of Geoscience, Engineering, Environment, and Technology 3, n.º 1 (10 de março de 2018): 63. http://dx.doi.org/10.24273/jgeet.2018.3.1.1226.

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The study area is located in some floodplains of meandering river environment along the Kampar River, Rumbio. Typical morphology of meandering river that found in this area can be classified as stream channel, floodplain, abandoned channel, and sand bars deposit. Meandering river system carries sediment supply by suspended and bed - load (mixed load) in conjunction with low energy into a particular characteristic on sediment deposition. This study aims to determine the characteristics of the sediments, changes in vertical and lateral spread of sediment deposition on the floodplain environment. This study conducted by field survey using a hand auger of 1.5m - 4m depth and trenching which is a layer that has been exposed of 1-2 meters depth. Further analysis had been carried out using granulometri method and core data analysis to determine the characteristics and depositional facies. Sediment deposit that formed along the Kampar River is the result of the main channel migration of Kampar River. The characteristic of quaternary sediment facies is coarse to gravelly sand on the bottom followed by fine to very fine sand with pattern fining upwards and silt to clay and abundant terrestrial organic matter at the uppermost layer. Depositional facies are determined based on the characteristics of sediment facies which can be grouped into a stream channel, oblique accretion deposits, sand bars and overbank deposits.

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Azmi, Azyan Syahira, Mohd Suhaili Ismail, Jasmi Ab Talib e Nur Marina Samsudin. "Environment Of Deposition Of The Jurassic-Cretaceous Continental Deposit In Central Pahang (Peninsular Malaysia) By Sedimentary Facies Analysis". Bulletin Of The Geological Society Of Malaysia 70, n.º 1 (30 de novembro de 2020): 153–62. http://dx.doi.org/10.7186/bgsm70202013.

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Spatial lithofacies and lithofacies association serves as one of the reliable methods in assessing the depositional process of sediments and interpreting its depositional environment. The method of facies analysis is adapted in this study where four newly exposed stratigraphic sections along the Jerantut-Maran road in Jerantut, Central Pahang of Peninsular Malaysia were studied. Previous studies showed that the environment of deposition of these continental deposits is broadly of braided-meandering river. Sedimentological data from the newly exposed stratigraphic sections had given a better understanding on the sedimentation processes involved in these deposits where interpretation on the environment of deposition is construed up to its sub-environment. The main lithofacies recognized include conglomerate, sandstone, and fine-grained facies. The facies associations identified include (i) massive to laminated silt/mudstone, (ii) massive sandstone, (iii) thin to thick ripple to parallel laminated sandstone, (iv) conglomeratic sandstone, (v) graded channelized sandstone, (vi) coarsening upwards medium bedded sandstone and (vii) heterolithic sandstone. The different facies associations are grouped to four (4) facies assemblages showing characteristics of certain environment: (1) floodplain, (2) channel bar complex, (3) point bar and (4) crevasse splay. Floodplain facies assemblage is marked by fine-grained facies, mainly siltstone/mudstone and fine-grained sands with lower flow regime structures. Channel bar complex is identified by high energy deposits of coarse-to-medium grained sandstones often with scoured bottom and lenticular geometry. Point bar is recognized by the lateral accretion surfaces often consisting of normal graded sandstone with sharp top and bottom contact, sometimes capped with thin mudstones. Crevasse splay facies assemblage is characterized by heterolithic sandstone, dominated by flaser-wavy bedding and coarsening upwards medium bedded sandstone that is overlain by fine-grained facies of the floodplain assemblage. The overall facies based on an outcrop scale suggests general features of fluvial facies with fluctuations in flow energy. The environment of deposition is thus interpreted to be of braided river with floodplains and isolated point bar.

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Shaw, John D., Edmond C. Packee, Sr. e Chien-Lu Ping. "Growth of balsam poplar and black cottonwood in Alaska in relation to landform and soil". Canadian Journal of Forest Research 31, n.º 10 (1 de outubro de 2001): 1793–804. http://dx.doi.org/10.1139/x01-119.

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While constructing site index curves for balsam poplar (Populus balsamifera L.) and western black cottonwood (Populus trichocarpa Torr. & A. Gray) for interior and southcentral Alaska, we found variations in growth patterns that appeared to be related to landform and soil properties. We characterized soils for 42 of 65 site index plots in an attempt to explain site productivity variation. We found significant negative correlations between site index and elevation. Region, landform, and floodplain characteristics (especially sediment deposition) significantly affected poplar growth rate and soil development patterns. Nutrient availability and recycling appear to be mediated by flooding through scouring or burial of surface organic layers. Soil pH patterns related to O-horizon development and salt crust formation and dissolution described previously for the Tanana River floodplain do not hold for all floodplains in Alaska. At similar latitudes and elevations, upland locations may have higher site indices than frequently sedimented floodplain locations because upland soil development is relatively uninterrupted. Floodplain locations experiencing little or no sediment accumulation after establishment of poplar stands tend to have higher site indices than those experiencing frequent sediment accumulation. At some floodplain locations, site index was positively correlated with rooting depth.

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Teses / dissertações sobre o assunto "Floodplain deposition"

Stone, Peter Michael. "The particle size selectivity of suspended sediment delivery from drainage basins". Thesis, University of Exeter, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337807.

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The delivery of suspended sediment from drainage basins has frequently been quantified in mass terms by use of the suspended sediment budget approach, which identifies sources, storage and output of mobilised sediment. This thesis investigates the particle size characteristics of the sediment associated with the key components of the suspended sediment budgets of four drainage basins in Devon, U. K. to determine whether particle size selectivity occurs in the delivery of suspended sediment from the hillslopes to the basin outlet. Attention focused on pasture land because previous studies had indicated that this was the dominant source of suspended sediment and that arable fields and channel banks were relatively insignificant in these catchments. Samples of sediment were mobilised from pasture hillslopes using a field-portable rainfall simulator; samples of suspended sediment were collected from the river channel during storm events either manually, by automatic pump samplers or by using rising limb siphon samplers; suspended sediment deposited on the channel bed was sampled using bed traps and by resuspending sediment deposited on the river bed during low flows; and sediment deposited on the floodplain during overbank flooding was collected using Astroturf mat traps or by sampling surface material. Samples were collected to investigate both temporal and spatial variability in grain size behaviour. All sediment samples were pretreated to remove organic matter and their chemically dispersed (absolute) particle size composition was measured using a Coulter LS 130 laser granulometer. The particle size composition of transported/deposited sediment was compared with that of the samples from potential sources to determine whether particle size selectivity had occurred. Where possible, measurements of the natural in situ particle size distribution (effective particle size) were also undertaken by quick return of samples to the laboratory for immediate measurement without pre-treatment using the laser granulometer. Particle size selectivity was found to have occurred in the mobilisation of sediment from the hillslope pasture land sources. Seasonal variations were identified in the particle size characteristics of both sediment mobilised from the hillslopes and suspended sediment samples. Spatial variations were identified in the particle size composition of sediment deposited on the floodplain. These seasonal and spatial variations reflect the particle size selectivity of detachment, transport and deposition processes which is in turn influenced by the aggregation or flocculation (effective particle size) of the sediment.

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Horton, Kimberly. "Roadway effects on the hydrologic regime of temporary wetlands in the Missouri River floodplain in Missouri". Diss., Columbia, Mo. : University of Missouri-Columbia, 2005. http://hdl.handle.net/10355/4241.

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Thesis (M.S.)--University of Missouri-Columbia, 2005.
The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (January 11, 2007) Includes bibliographical references.

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Simm, David John. "The deposition and storage of suspended sediment in contemporary floodplain systems : a case study of the River Culm, Devon". Thesis, University of Exeter, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334992.

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This thesis documents the rates and patterns of contemporary and recent overbank deposition along the lower reaches of the River Calm, S. E. Devon, England. Two temporal perspectives are adopted: (i) short-term rates based on contemporary flood events, using sediment traps, the sampling of in-channel suspended sediment and qualitative field observation of inundation processes; and, (ii) recent (over the past 35 years) rates of vertical accumulation, using the caesium-137 technique. These techniques also enable lateral and downstream trends to be identified. Longer-term implications are also addressed using a simple lithofacies classification of alluvial sections, supplemented by historical evidence of channel change and anthropogenic impact along the study reach. Overbank deposition rates are generally low along the study reach, averaging 0.7 mm year-1 (using estimates of suspended sediment conveyance losses), 0.4 mm year-1 (sediment traps) and 0.5 mm year-1 (caesium-137 studies). In general, the highest deposition rates are associated with the levee, depressions and breaches. Deposition rates, however, are temporally and spatially highly variable, being dependent upon the microtopographic relief and vegetation of the floodplain, the mode of inundation, and the extent of retention pondage. Anthropogenic impact on the floodplain is also noted, in particular the role of ditches in distributing floodwaters across the floodplain and the compartmentalisation effect of barriers to flow. These have important implications for the rates of overbank deposition and the sedimentological characteristics of deposits. The role of scour remobilisation of sediment is also assessed. The spatial detail afforded by the caesium-137 technique has been used to identify areas of the floodplain which may be locally susceptible to scour. This study highlights the potential for lowland floodplains undergoing regular flooding to suffer contamination from radionuclides and other pollutants, and leads to an improved understanding of the spatial and temporal rates and trends in deposition and sedimentological characteristics of overbank deposits on the floodplain of a suspension load-dominant river system.

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Aalto, Rolf Erhart. "Geomorphic form and process of sediment flux within an active orogen : denudation of the Bolivian Andes and sediment conveyance across the Beni Foreland /". Thesis, Connect to this title online; UW restricted, 2002. http://hdl.handle.net/1773/6718.

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Truchan, Jessie J. "Genesis of Carbonate Lakes on Perennial Siliciclastic Floodplains". Ohio University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1242778273.

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Nicholas, Andrew Paul. "Modelling overbank deposition on floodplains : a case study of the River Culm, Devon". Thesis, University of Exeter, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239297.

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Jung, Kwansue 1959. "The comparative sediment processes in channel and overbank". Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/277205.

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The question posed in this study is why alluvial soil on a floodplain is finer than the bed material of the river that supplied the sediments deposited to form the floodplain. A schematic, simplified river/floodplain system is used in an approximate analysis to find the size distribution of the floodplain soil. It is assumed that the stable limiting condition is a suspended load in the floodplain flow of the same concentration and composition as the sediment load in that portion of the river channel flow above the level of the floodplain. It was found that floodplain soil should be finer than the channel bed material; how much finer depending on the bank height, and to a lesser degree the width of the floodplain.

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Hughes, Andrew Owen Physical Environmental &amp Mathematical Sciences Australian Defence Force Academy UNSW. "An assessment of recent changes in catchment sediment sources and sinks, central Queensland, Australia". Awarded by:University of New South Wales - Australian Defence Force Academy. Physical, Environmental & Mathematical Sciences, 2009. http://handle.unsw.edu.au/1959.4/43622.

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Spatial and temporal information on catchment sediment sources and sinks can provide an improved understanding of catchment response to human-induced disturbances. This is essential for the implementation of well-targeted catchment-management decisions. This thesis investigates the nature and timing of catchment response to human activities by examining changes in sediment sources and sinks in a dry-tropical subcatchment of the Great Barrier Reef (GBR) catchment area, in northeastern Australia. Changes in catchment sediment sources, both in terms of spatial provenance and erosion type, are determined using sediment tracing techniques. Results indicate that changes in sediment source contributions over the last 250 years can be linked directly to changes in catchment land use. Sheetwash and rill erosion from cultivated land (40-60%) and channel erosion from grazed areas (30-80%) currently contribute most sediment to the river system. Channel erosion, on a basin-wide scale, appears to be more important than previously considered in this region of Australia. Optically stimulated luminescence and 137Cs dating are used to determine pre-and post- European settlement (ca. 1850) alluvial sedimentation rates. The limitations of using 137Cs as a floodplain sediment dating tool in a low fallout environment, dominated by sediment derived from channel and cultivation sources, are identified. Low magnitude increases in post-disturbance floodplain sedimentation rates (3 to 4 times) are attributed to the naturally high sediment loads in the dry-tropics. These low increases suggest that previous predictions which reflect order of magnitude increases in post-disturbance sediment yields are likely to be overestimates. In-channel bench deposits, formed since European settlement, are common features that appear to be important stores of recently eroded material. The spatially distributed erosion/sediment yield model SedNet is applied, both with generic input parameters and locally-derived data. Outputs are evaluated against available empirically-derived data. The results suggest that previous model estimates using generic input parameters overestimate post-disturbance and underestimate predisturbance sediment yields, exaggerating the impact of European catchment disturbance. This is likely to have important implications for both local-scale and catchment-wide management scenarios in the GBR region. Suggestions for future study and the collection of important empirical data to enable more accurate model performance are made.

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Anderson, Christopher John. "The influence of hydrology and time on productivity and soil development of created and restored wetlands". Columbus, Ohio : Ohio State University, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1132540084.

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Parker, Israel David. "The Role of Free-ranging Mammals in the Deposition of Escherichia coli into a Texas Floodplain". Thesis, 2010. http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8341.

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Free-ranging wildlife are an important contributor of fecal pollution in the form of Escherichia coli (E. coli) to water bodies. Currently, details of this contribution are nebulous and understudied. Much of the related research has not focused on freeranging wildlife; instead investigations examine entire systems while estimating wildlife contribution indirectly or with data of inconsistent quality and source. I began my research by conducting a meta-analysis of existing research to determine the current state of knowledge of wildlife’s specific contribution. Data were sparse, fragmented, of variable quality, and difficult to access. Researchers relied on a variety of outside sources (e.g., state natural resource agencies). Making comparison between studies was nearly impossible because methodologies differed greatly or were described inconsistently. I then calculated wildlife population densities, undertook fecal collection, and conducted spatial analyses of fecal deposition to gather accurate and relevant data of the study area. I augmented field data collection with data derived from my meta-analysis (i.e., fecal deposition rates). I was able to estimate the relative role of individual species (e.g., raccoons [Procyon lotor], white-tailed deer [Odocoileus virginianus], and feral hogs [Sus scrofa]). Finally, I created a model using these data to determine important parameters for future research (e.g., fecal deposition rates) and simulate various management strategies. Although all parameters need more research focus, I found defecation rates were especially important but little researched. I found raccoons were the greatest determiner of potential E. coli load in the floodplain though adjustment of other parameters would greatly impact these findings.

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Livros sobre o assunto "Floodplain deposition"

Thonon, Ivo. Deposition of sediment and associated heavy metals on floodplains. Utrecht: Koninklijk Nederlands Aardrijkskundig Genootschap, Faculteit Geowetenschappen Universiteit Utrecht, 2006.

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Thonon, Ivo. Deposition of sediment and associated heavy metals on floodplains. Utrecht: Koninklijk Nederlands Aardrijkskundig Genootschap, 2005.

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Rivers and floodplains: Forms, processes, and sedimentary record. Oxford, UK: Blackwell Pub., 2003.

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Wolfe, William J. Recent sedimentation and surface-water flow patterns on the flood plain of the North Fork Forked Deer River, Dyer County, Tennessee. Nashville, Tenn: U.S. Dept. of the Interior, U.S. Geological Survey, 1993.

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J, Wolfe William. Recent sedimentation and surface-water flow patterns on the flood plain of the North Fork Forked Deer River, Dyer County, Tennessee. Nashville, Tenn: U.S. Dept. of the Interior, U.S. Geological Survey, 1993.

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A study of sedimentation in the Brahmaputra-Jamuna floodplain. Arlington, Virginia: Irrigation Support Project for Asia and the Near East, 1995.

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Bridge, J. S. Rivers and Floodplains: Forms, Processes and Sedmentary Record. Blackwell Publishing Limited, 2003.

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Capítulos de livros sobre o assunto "Floodplain deposition"

Shangchi, Hong, e Chen Zhilin. "Estimate of Reduction in Deposition in Lower Yellow River by Warping on Floodplains". In The GeoJournal Library, 585–96. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-2450-5_37.

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Richter, Johannes, Stefan Ritzel, Rainer Gellermann, Kristin Nickstadt e Rolf Michel. "Radiologically Relevant Radionuclide Depositions in the Agriculturally Used Parts of the Mulde River Floodplains". In Uranium, Mining and Hydrogeology, 469–76. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-87746-2_58.

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"Strategies for Restoring River Ecosystems: Sources of Variability and Uncertainty in Natural and Managed Systems". In Strategies for Restoring River Ecosystems: Sources of Variability and Uncertainty in Natural and Managed Systems, editado por F. R. HAUER, C. N. DAHM, G. A. LAMBERTI e J. A. STANFORD. American Fisheries Society, 2003. http://dx.doi.org/10.47886/9781888569469.ch4.

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<em>Abstract</em>.—River ecosystem integrity is evaluated within a variety of landscape scales. We examine influences of variations in natural processes and human actions on river ecosystems and propose a concept for restoring impaired systems. The ecological structure and function of rivers vary across a hierarchy of landscape scales with different spatial and temporal dimensions. The major linkages within river systems include exchange of water and materials along longitudinal connections from streams to rivers, lateral connections between river and floodplain systems, and vertical surface and subsurface (hyporheic) water exchanges. Strong longitudinal linkages dominate confined river reaches while unconfined floodplain reaches show strong affinities for lateral and vertical exchange. A landscape concept, “the shifting habitat mosaic” (SHM), provides a framework for understanding how these interactions create and maintain the physical and ecological diversity of habitats, biotic communities, and ecosystem integrity. While each river system has unique physical and ecological characteristics, many human actions and ecological effects can be expressed within the SHM concept. For example, societal needs for power generation, transportation, water management, and land uses (e.g., urban and agricultural) often alter natural processes of hydrologic regimes and material transport and deposition. These factors affect interactions between the river channel and the surrounding river–riparian corridor. Restoration strategies can apply the SHM concept by focusing on restoring normative variations to processes (e.g., hydrologic regimes) that contribute to ecosystem integrity. Management practices (e.g., dam hydrologic regimes, flood control facilities, levees, land uses) can be modified to restore natural physical and ecological processes (e.g., thermal regimes, water exchange, and animal migrations).

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"The Ecology and Management of Wood in World Rivers". In The Ecology and Management of Wood in World Rivers, editado por DAVID R. MONTGOMERY, BRIAN D. COLLINS, JOHN M. BUFFINGTON e TIMOTHY B. ABBE. American Fisheries Society, 2003. http://dx.doi.org/10.47886/9781888569568.ch2.

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<em>Abstract.</em>—Wood has been falling into rivers for millions of years, resulting in both local effects on channel processes and integrated influences on channel form and dynamics over a wide range of spatial and temporal scales. Effects of stable pieces of wood on local channel hydraulics and sediment transport can influence rates of bank erosion, create pools, or initiate sediment deposition and bar formation. At larger spatial scales, changes in the supply of large wood can trigger changes in both river-reach morphology and the interaction between a river and its floodplain. Over long time scales, wood-rich rivers may retain more sediment and have lower sediment transport rates and steeper slopes than comparable wood-poor channels. Most geomorphic effects of wood in rivers arise from large, stable logs that catalyze changes in the routing and storage of both smaller wood and sediment. The size of a log relative to the channel provides a reasonable gauge of the potential stability of in-channel wood. Channels with a high supply of large, potentially stable wood may experience substantial vertical variability in bed elevation independent from external forcing (e.g., climate variability, temporal variations in sediment supply, or tectonic activity). In some river systems, changes in the wood regime, as described by the size and amount of wood supplied to a river, can result in effects as great as those arising from changes in the sediment supply or the discharge regimes. Consequently, an understanding of the geomorphic effects of wood is crucial for assessing the condition and potential response of forest channels.

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Mendes, Eric, e Michael S. Nassaney. "Hide Processing and Cultural Exchange in the Fort St. Joseph Community". In Fort St. Joseph Revealed, editado por Michael S. Nassaney e Michael S. Nassaney, 153–72. University Press of Florida, 2019. http://dx.doi.org/10.5744/florida/9780813056425.003.0007.

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This chapter examines archaeological remains recovered from the Lyne site (20BE10) located on the terrace in proximity to the floodplain settlement of Fort St. Joseph. Artifacts and features that were contemporaneous with the Fort suggest that a long occupational history of this area and different post-depositional formation processes have produced cultural deposits that vary considerably from what has been recovered at the nearby Fort. The authors places an emphasis on a series of smudge pits that evaded agricultural destruction. Their morphology and contents assist in placing these features into a cultural context and demonstrate the types of activities that were conducted by a multiethnic population engaged in cross-cultural exchange at a commercial fur-trading post in the western Great Lakes region.

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Talchabhadel, Rocky, Kenji Kawaike e Hajime Nakagawa. "Temporary De-Poldering for a Long Term Flood/Sediment Management in the Southwestern Bangladesh". In River Basin Management - Sustainability Issues and Planning Strategies. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.95265.

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Southwestern Bangladesh has been seriously affected by perennial waterlogging over the last few decades. It is primarily due to excessive riverbed siltation outside the polders after the construction of embankments along both sides of the tidal rivers. These embankments de-linked the huge natural floodplains and restricted a gradual process of natural deposition inside the polders. An introduction of the tidal basin concept by temporary de-poldering (embankment cut) at some designated locations has substantially solved the issues. The current chapter looks at the historical practice of flood/sediment management, the evolution of embankments and their de-poldering, inclusion of Tidal River Management (TRM) in long term flood/sediment management, and discusses a technical aspect of flood/sediment dynamics across the tidal river system. The process of restoring beneficial tidal flooding by cutting embankment at certain locations, commonly known as TRM, is not a novel method. The TRM has started from age-old practice and proves technically one of the effective methods of sustainable flood/sediment management in the tide-dominated river system. It is an example of building with nature, where little human interventions are needed, and a resilient measure for waterlogging, drainage-congestion, and river-siltation.

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Fagan, Brian. "Pharaohs and Pyramids". In From Stonehenge to Samarkand. Oxford University Press, 2006. http://dx.doi.org/10.1093/oso/9780195160918.003.0008.

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The Nile slashes through the eastern Sahara Desert like an arrow, a stalk of green amid some of the most arid landscape on earth. Each summer, floodwaters from deep in tropical Africa inundate the floodplain, depositing fertile silt and nourishing growing crops, enabling an Egyptian civilization to endure for five thousand years. Along the river’s banks, pharaohs, considered to be living gods, created a palimpsest of pyramids, rock-cut tombs, and temples that have fascinated the traveler since Herodotus’s day. Egypt was the land of Ra, the sun god, whose golden rays shone day after day in an unchanging chronicle of human existence and immortality— birth, life, and death. Ra’s rays shine between the serried pillars of Karnak’s Hypostyle Hall, darken the jagged contours of the Valley of Kings in deep shadow, project the steep slopes of the pyramids of Giza over the surrounding desert. Ancient Egyptian ruins cast a profound spell over the visitor, especially in the days before Egyptologists measured the ruins and recorded their secrets. They were desolate, unfamiliar, their gods irrevocably gone, the hieroglyphs on the walls unintelligible except to a privileged few—and that only after about 1830, when Jean François Champollion’s decipherment came into common use. But the sense of time and history these monuments conveyed was, and still is, pervasive. The figures on temple and tomb walls expose the habits, fantasies, and beliefs of thirty dynasties. Even today, there is an underlying sense of permanence along the Nile. The pharaohs have vanished, succeeded by caliphs, pashas, colonial overlords, and presidents, but life along the Nile still follows a timeless routine of planting and harvest, of life and death. The traveler has been part of this timeless landscape for more than two thousand years. We have already encountered Roman tourists at the Colossi of Memnon. Christian pilgrims on their way to Jerusalem passed through, too, although travel was difficult for the faithful in what was now Islamic territory. The founding in London of the Levant Company in 1581, originally to foster trade with Turkey—among other things, trade in coffee—brought more visitors, some of them in search of mumiya, pounded-up Egyptian mummy, considered to be a powerful aphrodisiac.

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Trabalhos de conferências sobre o assunto "Floodplain deposition"

Sutfin, Nicholas A., Joel C. Rowland, Mulu Fratkin, Sophie J. Stauffer, Rosemary Carroll, Wendy Brown e Kenneth H. Williams. "RIVER BANK EROSION, FLOODPLAIN SEDIMENT DEPOSITION, AND A FLOODPLAIN SEDIMENT BUDGET OVER A 60 YEAR TIME PERIOD". In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-325126.

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Sutfin, Nicholas A., Joel C. Rowland, Sophie J. Stauffer, Mulu Fratkin, Katrina Bennett, Rosemary Carroll, Helen F. Malenda, Richard S. Middleton e Kenneth H. Williams. "HYDROLOGIC DRIVERS OF FLOODPLAIN EROSION AND DEPOSITION ALONG THE MEANDERING EAST RIVER, CO". In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-308571.

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Shonnard, Christine, James Chisholm, James J. Zambito, Brady Z. Foreman, Ellen D. Currano, Marieke Dechesne e Regan E. Dunn. "EVALUATING CYCLES IN DISTAL FLOODPLAIN DEPOSITION WITHIN THE EARLY PALEOGENE HANNA BASIN, WYOMING, USA". In Joint 53rd Annual South-Central/53rd North-Central/71st Rocky Mtn GSA Section Meeting - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019sc-326815.

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Wenhold, Leah, e Larry D. McKay. "INVESTIGATIONS OF URBAN FLOODPLAIN SEDIMENT TEXTURE, DEPOSITIONAL RATE AND CONTAMINATION IN KNOXVILLE, TN". In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-318620.

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Wenhold, Leah, e Larry D. McKay. "INVESTIGATIONS OF URBAN FLOODPLAIN DEPOSITIONAL RATES AND INDUSTRIAL CONTAMINATION ALONG THIRD CREEK IN KNOXVILLE, TN". In 68th Annual GSA Southeastern Section Meeting - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019se-327166.

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Stinchcomb, Gary E., C. Lance Stewart, Emily Blackaby, Rachel Lombardi, Lisa Davis, Steven L. Forman, William C. Hockaday e David S. Leigh. "FLOODPLAINS AS REPOSITORIES OF INFORMATION ON CARBON ADDITION RATES IN DEPOSITIONAL SOIL PROFILES". In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-322969.

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King, Meghan E., Nicholas A. Sutfin e Joel C. Rowland. "STRATIGRAPHY OF ABANDONED CHANNELS: INFERRING RATES AND FLOW CONDITIONS USING DEPOSITIONAL SEQUENCES OF CHANNEL FILL ALONG THE FLOODPLAIN OF THE EAST RIVER, CO". In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-308564.

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