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Dissertations / Theses on the topic 'River system'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Sgouridis, Fotis. "Nitrate attenuation in a restored river floodplain system : River Cole (Oxfordshire, UK)." Thesis, Queen Mary, University of London, 2010. http://qmro.qmul.ac.uk/xmlui/handle/123456789/590.

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Restoring river-floodplain connectivity has been proposed as an alternative management measure for natural flood defence through the temporary storage of floodwaters and the attenuation of flood peaks downstream. Whilst several studies have documented the associated ecological and landscape amenity values of such hydrological measures, the water quality benefits to the adjacent water bodies have been inadequately studied. To date, the focus of scientific research and natural resource management has been on the role of riparian buffer zones for the alleviation of agricultural diffuse nitrate po

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2

Pernik, Maribeth. "Mixing processes in a river-floodplain system." Thesis, Georgia Institute of Technology, 1985. http://hdl.handle.net/1853/19514.

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3

Moreira, Gina-Lee. "Fluvial system restoration – case study: river Tua." Master's thesis, Faculdade de Ciências e Tecnologia, 2013. http://hdl.handle.net/10362/11096.

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Dissertação para obtenção do Grau de Mestre em Engenharia do Ambiente, Perfil de Engenharia de Sistemas Ambientais<br>The purpose of this thesis is to provide river basin managers with a framework for river restoration. To that end, it presents and discusses the relevant information on the current condition of the river Tua, in northern Portugal, and establishes what can be done to restore the river basin in order to protect the most important drainage basin's functions and ecosystems. It is intended that this thesis will serve as an example of the application of current knowledge on freshwat

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4

Barker, Kenneth Warren. "Bioavailable Phosphorus in the Bear River System." DigitalCommons@USU, 1988. https://digitalcommons.usu.edu/etd/4400.

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The bioavailable fraction of phosphorus (BAP) in the lower Bear River system waters was investigated. BAP plays a critical role as the limiting nutrient for algal production and eutrophication in proposed reservoirs in the Bear River system. The Bear River system has a hardness rang ing between 180-240 rng/L as CaC03 which significantly affects BAP. BAP estimation was done by a modified Selenastrum capricornutum Printz Algal Assay Bottle Test. The algal bioassay is considered the best estimator of BAP because no chemical tests or i ndicator parameters are available. Autoclaving and UV radiatio

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5

Shi, Changxing, and 師長興. "Sediment flux through the Yellow River sediment routing system." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2002. http://hub.hku.hk/bib/B29851944.

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6

Allaway, Christopher. "Combined nitrogen retention in an agricultural river system." Thesis, University of Ottawa (Canada), 2006. http://hdl.handle.net/10393/27108.

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Since combined nitrogen is a pollutant in streams, rivers and coastal areas, conditions that favour nitrogen removal were identified. The importance of stream depth as a predictor of a reach's capacity to remove nitrogen was tested in the South Nation watershed (3915 km2), an agricultural watershed in eastern Ontario. Combined nitrogen (N) retention was estimated in 48 reaches across the watershed which varied in discharge (0.0008--118 m3 s-1), length (350 m to 5.2 km) and size from headwaters to the outflow of the South Nation River at the Ottawa River. Retention dynamics were also investigat

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7

Lunn, Rebecca Jane. "A nitrogen modelling system for large river basins." Thesis, University of Newcastle Upon Tyne, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294852.

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8

Christmas, Martin. "Phosphorus dynamics in the Swale-Ouse river system." Thesis, Durham University, 1998. http://etheses.dur.ac.uk/4670/.

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A study was made of the phosphorus ecology of the Swale - Ouse river in northern England. It ranges from a stream draining a peat moorland to a mature river influenced by urbanisation (estimated population 250 000) and intensive agriculture. The aims were to assess the concentration and variability of aqueous N and P on spatial and temporal scales, and the response of two common mosses, Fontinalis antipyretica and Rhynchostegium riparioides, to those changes. Key aspects included analysis of water chemistry, internal nutrient contents of mosses, and 'surface' phosphatase activity. The rate of

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9

Fleckenstein, Jan Henrich. "Modeling river-aquifer interactions and geologic heterogeneity in an alluvial fan system, Cosumnes River, CA /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2004. http://uclibs.org/PID/11984.

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10

Tijani, Fatai Oladapo. "Scale effect in nutrient transport along a rural river system : the river Eden, Cumbria UK." Thesis, University of Newcastle upon Tyne, 2016. http://hdl.handle.net/10443/3683.

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Many research studies on nutrient transfer are conducted at small scale and transferring such findings to the large scale at which planners and catchment managers work faces uncertainties because of non-linearity. There is a need therefore for multiscale studies, which define and link the transfer mechanisms across spatial scales. Such a study may also provide the answers on the processes driving it and test the answers further by using a model. Experimental data to support the study were collected from two complementary research programmes in the Eden catchment. Spatial scale variations were

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11

Mills, Carolyn. "Spatial variability and scale dependency yield in a rural river system- The river Eden, Cumbria, UK." Thesis, University of Newcastle Upon Tyne, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.512025.

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12

Melvill, James Alexander. "Real-time model development for the full river system /." Link to the online version, 2007. http://hdl.handle.net/10019/1999.

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13

Wilkinson, Chad Eric. "Sportfish population dynamics in an intensively managed river system." Thesis, University of British Columbia, 2009. http://hdl.handle.net/2429/10179.

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The Elk River valley is intensively utilized by various resource industries including a recreational fishery that predominates in the river section between Sparwood and Elko. Most angling comes from fly-fishers in drift boats who mainly target westslope cutthroat trout (WCT) Onchorhyncus clarkii lewisi in the summer, but also secondarily catch bull trout (BT) Salvelinus confluentus. Non-native rainbow trout (RB) Onchorhyncus mykiss and Eastern brook trout (EB) Salvelinus fontinalis have also been introduced to the system. The river’s trout and char populations have never been directly examined

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14

Hayden, Jesse Thomas. "Indian River Inlet Bridge and Bathymetry Scour Monitoring System." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 163 p, 2009. http://proquest.umi.com/pqdweb?did=1885754611&sid=2&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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15

Graham, Stephen Thomas. "Continental river routing for fully coupled climate system models /." Full text (PDF) from UMI/Dissertation Abstracts International, 2000. http://wwwlib.umi.com/cr/utexas/fullcit?p3024456.

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16

Hattingh, Keaton Jade. "Geomorphological controls on pool formation and pool persistence in non-perennial river systems." University of the Western Cape, 2020. http://hdl.handle.net/11394/7739.

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>Magister Scientiae - MSc<br>Globally climate variability and anthropogenic effects are causing more perennial rivers to become non-perennial rivers. Non-perennial rivers are distinguished by their isolated pools which serve as refugia for aquatic organisms, water birds, and riparian vegetation. The literature on non-perennial rivers demonstrates that pools are poorly understood in terms of their location, nature, and geomorphic persistence. Therefore, this study examines the relationships between the spatial distribution, morphology, and substrate characteristics of pools in reaches of the Pr

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17

Mondol, Md Rashedul Kabir. "Population Connectivity of Two Australian Freshwater Fishes in a Large Tropical Dendritic River Network." Thesis, Griffith University, 2016. http://hdl.handle.net/10072/365654.

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Freshwater fishes are often characterized by extensive population genetic subdivision and low genetic diversity and are ideal subjects for investigating contemporary patterns of dispersal and subsequent gene flow. In lotic systems, different riverine architecture, variable hydrology and species biology influence genetic diversity and population structure in resident species. Stream-dwelling species often display greater levels of gene flow within drainages or catchments or sub-catchments than between them due to complexity of stream order and the isolating nature of these systems by land or se

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18

IVANOVA, OLGA. "Development of Decision Support System for Optimization of Dams’ Management on Complex River Systems." Doctoral thesis, Università degli studi di Genova, 2020. http://hdl.handle.net/11567/1010257.

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The thesis presents a complex approach for modelling of a complex reservoir systems for water drainage management. The model has been built over a segment of a river with a certain parameters of water inflow, water outflow, required power production and max possible flood occurrence. Then the segments may be replicated with specific parameters to simulate whole system of the river. The model has been optimized in order to obtain the water drainage operation policy with regards of current and expected water volumes in the reservoirs ratio, required power production revenue, and minimal flood oc

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19

Visser, Alwyn Jacobus Christiaan. "Real-time management of river systems by using a hydrodynamic model with optimisation." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/5438.

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Thesis (MScEng (Civil Engineering))--University of Stellenbosch, 2010.<br>ENGLISH ABSTRACT: In this research a Real-Time hydrodynamic optimisation model of the Orange-Fish-Sundays River (OFS) system which uses real-time data in order to forecast release hydrographs, is evaluated. The OFS system stretches over three catchment areas in the Eastern Cape namely Great Fish, Little Fish and Sundays Rivers. The OFS supplies water from the Orange River through a 800 km system of canals, tunnels, dams and rivers to registered water users in this area. In order to cope with increasing pressures on wate

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20

Rice, Stephanie Kimberly. "Suspended sediment transport in the Ganges-Brahmaputra River System, Bangladesh." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-1588.

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21

Allen, Lorraine Gillian. "The evolution of the Solent River system during the Pleistocene." Thesis, University of Cambridge, 1991. https://www.repository.cam.ac.uk/handle/1810/251498.

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22

Ainsworth, Andrew Mark. "Microbial organic nitrogen transformations in the River Swale-Ouse system." Thesis, University of Hull, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301371.

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23

Broad, K. J. "Population dynamics of juvenile salmon of the Wye river system." Thesis, Cardiff University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378462.

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24

Momoh, Jinnah Samuel. "Decision support system for river water quality forecasting and management." Thesis, University of Newcastle Upon Tyne, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246651.

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25

Moran, Kate Anne. "Aging Juvenile Gulf Sturgeon From the Apalachicola River System, Florida." Miami University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=miami1527187111928485.

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26

Fischer, Jason L. "Evaluating Habitat Restoration in the St. Clair-Detroit River System." University of Toledo / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1576160707431634.

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27

Pillsbury, Lori A. "Spatial and temporal chemical variations in the Hillsborough River system." [Tampa, Fla.] : University of South Florida, 2004. http://purl.fcla.edu/fcla/etd/SFE0000223.

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28

Tashev, Azamat. "Understanding Ecosystem Services through Organizational Analysis: Application to the Truckee-Carson River System." Ohio University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1515072255449453.

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29

Simsek, Gul. "An Approach To Urban River Rehabilitation For Coexistence Of River And Its Respective City: Porsuk River Case And City Of Eskisehir." Phd thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613339/index.pdf.

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All living things mostly the humans, as builders of civilizations, have always been in intrinsic bonds with water. This interaction between water (oceans, seas, lakes, rivers etc.) and settlements has existed since ancient civilizations. Among water resources, &lsquo<br>flowing waters&rsquo<br>such as rivers, streams, creeks, etc. have a prominent role as they are the lifeblood of most cities in terms of providing transportation, security, energy, irrigation, commerce, and recreation. By the late 19th century, developments of terrestrial transportation modes diminished the magnetism of rivers

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30

Germain, Richard James. "Drought management using a geographical information system." Ohio : Ohio University, 1996. http://www.ohiolink.edu/etd/view.cgi?ohiou1178651687.

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31

Langevin, Robert. "Genotoxicity in water and sediment extracts from the St. Lawrence river system, using the SOS chromotest." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=60498.

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Surface water and sediments from the St. Lawrence River system (Quebec region) were analysed for genotoxicity using nonlinear SOS Chromotest parameters, as well as for their chemical concentrations of polycyclic aromatic hydrocarbons and heavy metals. Additionally, sediments chlorobenzenes, polychlorinated biphenyls, organochlorinated pesticides, ammonia and nitrites concentrations were determined. Organic contaminants were extracted dichloromethane. For surface water, fifteen extracts of filtered water and seven of particulates, and for sediments, one extract of pore water and three of partic

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32

Becker, May Ling Luettich Richard A. "Hydrodynamic behavior of the Cape Fear River estuarine system, North Carolina." Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2006. http://dc.lib.unc.edu/u?/etd,2965.

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Thesis (Ph. D.)--University of North Carolina at Chapel Hill, 2007.<br>Title from electronic title page (viewed Jun. 23, 2010). "... in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Marine Sciences Physical Oceanography." Discipline: Marine Sciences; Department/School: Marine Sciences.

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33

McGregor, Heather Elizabeth. "Decolonizing the Nunavut school system : stories in a river of time." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/52592.

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This research explores the recent history of educational change in Nunavut’s public school system, primarily between the years 2000 and 2013. During this time, decision makers mandated that schools deliver programs in accordance with Inuit foundations of knowledge, values and ways of being. I show how new school system initiatives were largely informed by long-term Nunavut educators—Inuit and non-Inuit—as well as Elders and Inuit knowledge holders, whose perspectives reach into the remembered past and towards an imagined future. My inquiry centres in-depth interviews with Cathy McGregor, an ed

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34

Tomscha, Stephanie Anne. "Long-term mapping of ecosystem services in a river-floodplain system." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/55624.

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Humans derive a wide range of benefits from ecosystems, known as ecosystem services (ES). At the nexus of land and water, floodplains are particularly important for providing ES. Recently, problematic declines in ES have motivated research to better understand their spatial distributions. However, the temporal dynamics of critically important floodplain-specific ES remain poorly understood. These spatial and temporal dynamics as well as trade-offs that occur when management enhances one ES at the expense of others are particularly germane as a warming climate alters river flows. Landscape hist

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35

Noyes, Thomas Kelly. "Nutrient levels and biostimulation in the lower Colorado River/reservoir system." Thesis, The University of Arizona, 1985. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_e9791_1985_104_sip1_w.pdf&type=application/pdf.

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36

Williams, Mark Donald. "Salinity tolerance of small fishes from the Murray-Darling river system /." Title page, contents and conclusions only, 1987. http://web4.library.adelaide.edu.au/theses/09SB/09sbw725.pdf.

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37

Zhu, Xuanlin. "A Feasibility Study of Using River Water in University Cooling System." Thesis, Högskolan i Gävle, Avdelningen för bygg- energi- och miljöteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-19660.

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This thesis is to study the feasibility of using river water from Gavleån in the cooling system of University of Gävle. The project is proposed by the campus service manager Akademiska Hus AB which intended to replace the current cooling production system with the water cooling system to reduce the electricity cost in cooling production. The river by direct distance is 600 meters from the university, the river water is to be extracted from the river via a pump house, flow through pipeline buried underground and delivered to the equipment house of Akademiska Hus. Most water source cooling pre

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38

Bembo, David Geraint. "The brown trout (Salmo trutta L.) of the River Usk system." Thesis, Cardiff University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364473.

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39

Burns, Emily. "Assessing exposure and risks of pharmaceuticals in an urban river system." Thesis, University of York, 2018. http://etheses.whiterose.ac.uk/20448/.

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Pharmaceuticals are ubiquitous in the freshwater environment, a result of an increasingly urbanised water cycle. Environmental risk assessments are available for a small proportion of the over 1900 pharmaceuticals in use, raising concern over the potential risks posed by pharmaceuticals with limited data, as effects on non-target organisms have been observed. Experimentally filling these gaps is a large, costly and likely unnecessary task. Risk-based prioritisation is a potential tool for addressing this challenge by identifying which pharmaceuticals may pose risks and are therefore a priority

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40

Solo-Gabriele, Helena. "Metal transport in the Aberjona river system : monitoring, modeling, and mechanisms." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/11723.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1995.<br>Includes bibliographical references (v. 1, p. 421-431).<br>by Helena Solo-Gabriele.<br>Ph.D.

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41

Sinnadurai, Paul. "The ecology of Riparian Carabidae (Coleoptera) in a regulated river system." Thesis, Cardiff University, 2014. http://orca.cf.ac.uk/68179/.

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Rivers and riparian zones are among the most threatened ecosystems globally, with modification of their natural flow regime a major source of change. Exposed riverine sediments (ERS) are characteristic of unregulated rivers in their upper and middle reaches and among the few remaining natural riparian habitats. However, they are in decline across the UK and Europe as a result of widespread modifications to channel structure and flow regimes. Studies of ERS and their dependent carabid beetles can help to understand how environmental change is affecting river ecosystems more generally, but prolo

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42

Parkin, Geoffrey. "A three-dimensional variably-saturated subsurface modelling system for river basins." Thesis, University of Newcastle upon Tyne, 1996. http://hdl.handle.net/10443/3161.

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There are many circumstances where lateral flows in the upper soil layers above the regional groundwater table are important for hillslope and catchment hydrology, and in particular for the transport of contaminants. Perched water tables frequently occur in Quaternary drift sequences, reducing rates of recharge to the underlying aquifers and altering contaminant migration pathways; recent experimental and modelling studies have demonstrated the potential importance of lateral flows in the unsaturated zone, even in homogeneous soils; and lateral interflow at the hillslope scale, and its role in

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43

Jones, Roy William. "Aquatic invasions of the Nseleni River system: causes, consequences and control." Thesis, Rhodes University, 2015. http://hdl.handle.net/10962/d1017806.

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Globalization has seen an unprecedented dispersal of exotic and alien species worldwide resulting in worldwide homogenization and sometimes extinction of indigenous or endemic taxa. When an exotic species becomes established in a new habitat the invasive organisms are capable of having an impact on indigenous community dynamics and the overall structure and function of ecosystems. Furthermore, the impact of invasion is determined by the geographical range, abundance and the per-capita or per-biomass effect of the invader. However, the success of the introduced organisms is reliant on their abi

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44

Sass, Christopher Kevin. "Inventory and analysis of the Black Vermillion river system riparian corridors." Thesis, Manhattan, Kan. : Kansas State University, 2008. http://hdl.handle.net/2097/1006.

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45

Wang, Ya, and 王亚. "Isotopic and hydrogeochemical studies of the coast aquifer-aquitard system in the Pearl River Delta, China." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B46593597.

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46

Chambers, Jennifer Catherine. "The spatial modelling of palaeolithic secondary context assemblages : case studies from the Solent river system and Axe river valley, UK." Thesis, University of Southampton, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.414649.

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47

Sorooshian, Soroosh, Hoshin Gupta, Terri S. Hogue, Andrea Holz, and Dean Braatz. "A multi-step automatic calibration scheme (MACS) for river forecasting models utilizing the national weather service river forecast system (NWSRFS)." Department of Hydrology and Water Resources, University of Arizona (Tucson, AZ), 1999. http://hdl.handle.net/10150/615749.

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Final Report to the Hydrologic Research Laboratory of the National Weather Service Grant NA #87WHO582<br>Traditional model calibration by National Weather Service (NWS) River Forecast Center (RFC) hydrologists involves a laborious and time -consuming manual estimation of numerous parameters. The National Weather Service River Forecasting System (NWSRFS), a software system used by the RFCs for hydrologic forecasting, includes an automatic optimization program (OPT3) to aid in model calibration. The OPT3 program is not used operationally by the majority of RFC hydrologists who perform calib

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48

Nicholls, Daniel John. "The source and behaviour of fine sediment deposits in the river Torridge, Devon and their implications for salmon spawning." Thesis, University of Exeter, 2000. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324034.

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49

Liu, Kun, and 刘琨. "Geochemical and geomicrobiological studies of the ammonium-rich aquifer-aquitard system in the Pearl River Delta, China." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/196494.

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An aquitard is not only a confining layer in the aquifer-aquitard system, but also a functional complex for nutrient reservation and microorganism inhabitation. Geochemical characteristics and geomicrobial processes in aquitards play an important role in groundwater quality, and should be well studied. The Pearl River Delta is dominated by clay-rich aquitards and was intensively influenced by Holocene transgression. In this thesis, the aquifer-aquitard system in the PRD was studied from various perspectives including geophysics, geochemistry and geomicrobiology. Sediment and groundwater sample

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50

Abbe, Timothy. "Patterns, mechanics and geomorphic effects of wood debris accumulations in a forest river system /." Thesis, Connect to this title online; UW restricted, 2000. http://hdl.handle.net/1773/6730.

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