Rozprawy doktorskie na temat „River system”
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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.
Pełny tekst źródłaPernik, Maribeth. "Mixing processes in a river-floodplain system". Thesis, Georgia Institute of Technology, 1985. http://hdl.handle.net/1853/19514.
Pełny tekst źródłaBarker, Kenneth Warren. "Bioavailable Phosphorus in the Bear River System". DigitalCommons@USU, 1988. https://digitalcommons.usu.edu/etd/4400.
Pełny tekst źródłaMoreira, Gina-Lee. "Fluvial system restoration – case study: river Tua". Master's thesis, Faculdade de Ciências e Tecnologia, 2013. http://hdl.handle.net/10362/11096.
Pełny tekst źródłaThe 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 freshwater restoration which can be emulated by future managers in their efforts to restore this, or any water body they wish to. To this purpose, the thesis analyzes demographic data on the municipalities of the Tua drainage basin. It discusses literature and research on the subject of river restoration and important river processes in the following chapter, so as to introduce important theory concepts to have in mind when designing any restoration efforts. In its methodology, the techniques and data assessment tools used in the process of evaluating the river basin's conditions are described and defined, allowing interested managers to review and adapt to the specific needs of drainage basins anywhere. Finally, it presents a practical point-of-view intended to be applied on other freshwater bodies. The thesis includes the realization of an assessment physical characteristics and status of the Tua river reach, it splits up the drainage basin into several different sub-basins, for individual study, and, after a discussion of the conclusions drawn from the assessment for the whole drainage basin, it presents arguments for choosing the sub-sections which present the highest risk to the drainage basin and, as such, require priority action. This section also includes a presentation of the arguments in support of specific techniques to be put into place, given the specific needs of the sub-basin and the restoration goals for the entire drainage basin.
Shi, Changxing, i 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.
Pełny tekst źródłaLunn, 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.
Pełny tekst źródłaChristmas, Martin. "Phosphorus dynamics in the Swale-Ouse river system". Thesis, Durham University, 1998. http://etheses.dur.ac.uk/4670/.
Pełny tekst źródłaAllaway, Christopher. "Combined nitrogen retention in an agricultural river system". Thesis, University of Ottawa (Canada), 2006. http://hdl.handle.net/10393/27108.
Pełny tekst źródłaFleckenstein, 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.
Pełny tekst źródłaTijani, 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.
Pełny tekst źródłaMills, 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.
Pełny tekst źródłaWilkinson, Chad Eric. "Sportfish population dynamics in an intensively managed river system". Thesis, University of British Columbia, 2009. http://hdl.handle.net/2429/10179.
Pełny tekst źródłaMelvill, James Alexander. "Real-time model development for the full river system /". Link to the online version, 2007. http://hdl.handle.net/10019/1999.
Pełny tekst źródłaHayden, 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.
Pełny tekst źródłaGraham, 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.
Pełny tekst źródłaHattingh, 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.
Pełny tekst źródłaGlobally 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 Prins and Touws rivers in the Klein Karoo. A greater understanding of pools will facilitate better management, monitoring, and restoration strategies for pool ecology since the geomorphology of pools provides a key part of the ecological template. Worldview-2 satellite imagery (2017) and orthorectified aerial photography (2014, 2013, and 1944) were used to assess the effects of major flooding events on pools over time. A DGPS (Differential Global Positioning System) was used to survey the pool widths, lengths, depths, and valley widths, cross-sections, and longitudinal profiles of the river. Sediment samples and Wolman pebble counts were used to assess the grain size and organic matter content of each pool in the study area. Detailed descriptions of the characteristics of each pool in terms of position in the channel, valley form, and obstruction presence and type were also assessed. Results indicate that most of the large pools occur at bedrock outcrops of the valley margins, and smaller pools are associated with Vachellia karroo debris bar features. Larger and highly persistent pools are associated with valley confinement and smaller less persistent, scour pools occur mid-channel where the valley expands. Analysis of the results shows that the valley width is the dominant control on these forced pools. The type of obstruction also plays a role in the formation of the pool as large woody debris results in smaller pools whereas, bedrock outcrops result in larger sized pools. A significant relationship was found between the grain size and organic matter content of pools. Aerial photography of the spatial distribution of the pools revealed that before a major flood, the pools were small and patchy, whereas afterward, they were larger and more elongated. It is suggested that at the bedrock outcrops, major scouring and eddy processes drive the formation of larger pools during large flood events, whereas pool dissection by sediment deposits prevails during intervening intermediate to low flow periods. The results are discussed in terms of the geomorphic controls (valley width, pool dimensions, morphology, substrate, and obstruction characteristics) on the formation and maintenance of pools in dryland settings. A conceptual model is proposed to explain the geomorphic changes of the pools in the four geomorphological zones of non-perennial rivers.
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.
Pełny tekst źródłaENGLISH 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 water saving, water demand, water quality and dam safety, the Department of Water Affairs implemented this Orange Fish Sundays-Real Time (OFS-RT) system to calculate the optimal water flow, by running customised Danish Hydraulic Institute (DHI) MIKE11 software. The system utilizes an optimisation module that evaluates the simulated outcome at seven water release structures (dams, weirs and tunnels). Then during the optimisation process performs more adjustments to reach the objectives of the system to obtain the forecast release hydrographs. This OFS-RT model aims at target based objectives, using: (i) Hydras real-time field data of dam water levels, river flows and water quality from the area sent to the control office main computer at four hourly intervals via SMS and (ii) abstractors weekly water requests. This system takes irrigation and domestic demand into account as well as water quality, evaporation, rainfall, dam levels, dam safety, instream flow requirements and tributary flow. In order to manage the water flows through the OFS system the OFS-RT model forecasts the release hydrographs and uploads the predictions to a website to smooth operational procedures. The target outcomes were tested and evaluated during this research and it was found that the OFS- RT model succeeded in delivering release forecasts for the seven control structures to manage the OFS system. This research proved that management of river systems by using a real-time hydrodynamic model with optimisation is a useful tool for the optimal utilisation of water resources.
AFRIKAANSE OPSOMMING: Die doel van hierdie navoring is die evaluering van „n intydse hidrodinamiese optimiseringsmodel van die Oranje-Vis-Sondagsrivier (OVS) stelsel wat intydse data ontvang en loslatings hidrograwe verskaf. Die OVS stelsel strek oor drie opvangsgebiede in die Oos-Kaap: naamlik die Groot Vis-, Klein Vis- en Sondagsriviere en voorsien water vanuit die Oranjerivier deur „n 800 km stelsel van kanale, tonnels, damme en riviere, aan geregistreerde waterverbruikers in die gebied. Ten einde te voldoen aan die eise van waterbesparings, stygende vraag na water, die verskaffing van goeie water gehalte en damveiligheid, het die Departement van Waterwese „n intydse rekenaar model (OVS-IT) geïmplimenteer om die optimale watervloei deur middel van die aangepaste MIKE11 sagteware van die Danish Hydraulic Institute (DHI) te bereken. Hierdie stelsel maak gebruik van „n optimisering module wat die gesimuleerde uitkomste van verstellings aan sewe waterloslatingstrukture evalueer. Met optimisering word die verlangde hidrograaf deur verder aanpassings verkry. Data wat nodig is om die OVS-IT model se doel te bereik is: (i) Hydras intydse velddata van damwatervlakke, riviervloeie en water gehalte van die gebied ontvang deur die beheerkantoor se hoofrekenaar via SMS elke vier ure, en (ii) water verbruikers se weeklikse wateraanvrae Die stelsel neem die besproeiing en huishoudelike aanvraag in ag, sowel as soutgehalte, verdamping, reënval, damvlakke, dam veiligheid, stroom vloei vereistes en sytak byvloei. Die OVS se watervloei word beheer deur voorspelde loslatings hidrograwe, opgesom op „n webwerf wat die uitvoer prosedures aandui. Die intydse hidrodinamiese model met optimisering het volgens hierdie navorsing daarin geslaag om vir die beheer van die OVS stelsel, die loslatings van sewe beheerstrukture akkuraat te voorspel en bevind dat die model „n waardevolle instrument is vir die optimale bestuur van waterhulpbronne.
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.
Pełny tekst źródłaBroad, 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.
Pełny tekst źródłaMomoh, 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.
Pełny tekst źródłaPillsbury, 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.
Pełny tekst źródłaRice, 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.
Pełny tekst źródłaMoran, 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.
Pełny tekst źródłaFischer, 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.
Pełny tekst źródłaAllen, 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.
Pełny tekst źródłaTashev, 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.
Pełny tekst źródłaSimsek, 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.
Pełny tekst źródłaflowing waters&rsquo
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 and riverfronts, and growing industries led to the deterioration of rivers. Owing to these reasons, along with many others, they turned into sewage channels, were covered up, and became water scopes detached from the urban life. Particularly since the 1970s, with more attention given to sustainability of resources, a greater awareness has grown of the vital role of urban rivers as a resource for humans and a lifeline for cities. After being neglected for decades, urban rivers have started to be rehabilitated to solve the related problems. The new approach to urban river rehabilitation beyond classical practices that aim at recovering the physical conditions of rivers has come to the fore to address the problems comprehensively. Instead of independent and one-dimensional practices, the urban rivers have become to be seen as a vital part of urban water system and of the city itself. While rehabilitating urban rivers, recovering river health can be ensured provided that the entire urban water ecosystem is taken into consideration. The ecocity approach is one of the major new approaches that geared toward achieving a healthy city, and sustainability of water system is the significant goal within this approach. In this regard, the thesis first asserts that the ecocity criteria are likely to give way to a more sustainable future for urban rivers. Besides being a part of the ecosystem, urban rivers have transformed together with the surrounding built environment throughout the history of cities. Significant focal elements of the urban pattern, urban rivers should be dealt with other urban focal points, with the introduced concept of river-city integration, which is proposed as the second assertion of the thesis. In this respect, the study attempts to investigate urban rivers and their rehabilitation in relation with both the ecocity approach, and the river-city integration concept. The research methodology in the present study involves comparative anaysis of best practices and case study analysis. Porsuk River and the city of Eskisehir, which the river passes through, were selected as a case for empirical study. Criteria sets that determined within the frames of ecocity and river-city integration, and the testing of the criteria in the case area offers an opportunity to contribute to literature of river and city coexistence.
Germain, Richard James. "Drought management using a geographical information system". Ohio : Ohio University, 1996. http://www.ohiolink.edu/etd/view.cgi?ohiou1178651687.
Pełny tekst źródłaLangevin, 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.
Pełny tekst źródłaBecker, 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.
Pełny tekst źródłaTitle 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.
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.
Pełny tekst źródłaWilliams, 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.
Pełny tekst źródłaZhu, 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.
Pełny tekst źródłaBembo, 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.
Pełny tekst źródłaSass, 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.
Pełny tekst źródłaBurns, Emily. "Assessing exposure and risks of pharmaceuticals in an urban river system". Thesis, University of York, 2018. http://etheses.whiterose.ac.uk/20448/.
Pełny tekst źródłaSolo-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.
Pełny tekst źródłaIncludes bibliographical references (v. 1, p. 421-431).
by Helena Solo-Gabriele.
Ph.D.
Jones, Roy William. "Aquatic invasions of the Nseleni River system: causes, consequences and control". Thesis, Rhodes University, 2015. http://hdl.handle.net/10962/d1017806.
Pełny tekst źródłaParkin, 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.
Pełny tekst źródłaMcGregor, 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.
Pełny tekst źródłaEducation, Faculty of
Curriculum and Pedagogy (EDCP), Department of
Graduate
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.
Pełny tekst źródłaForestry, Faculty of
Graduate
Sinnadurai, Paul. "The ecology of Riparian Carabidae (Coleoptera) in a regulated river system". Thesis, Cardiff University, 2014. http://orca.cf.ac.uk/68179/.
Pełny tekst źródłaWang, Ya, i 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.
Pełny tekst źródłaChambers, 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.
Pełny tekst źródłaSorooshian, Soroosh, Hoshin Gupta, Terri S. Hogue, Andrea Holz i 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.
Pełny tekst źródłaTraditional 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 calibration studies. Lack of success with the traditional single - step, single-criterion automatic calibration approach has left hydrologists more comfortable employing a manual step-by-step process to estimate parameters. This study develops a Multistep Automatic Calibration Scheme (MACS), utilizing OPT3, for the river forecasting models used by the RFCs: the Sacramento Soil Moisture Accounting (SAC-SMA). and SNOW-17 models. Sixteen parameters are calibrated in three steps, replicating the progression of manual calibration steps used by NWS hydrologists. MACS is developed by minimizing different objective functions for different parameters in a step -wise manner. Model runs are compared using the MACS optimized parameters and the manually estimated parameters for six basins in the North Central River Forecast Center (NCRFC) forecast area. Results demonstrate that the parameters obtained via the MACS procedure generally yield better model performance than those obtained by manual calibration. The MACS methodology is a time-saving approach that can provide prompt model forecasts for NWS watersheds.
Liu, Kun, i 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.
Pełny tekst źródłapublished_or_final_version
Earth Sciences
Doctoral
Doctor of Philosophy
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.
Pełny tekst źródłaAbbe, 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.
Pełny tekst źródłaBoys, Craig Ashley, i n/a. "Fish-Habitat Associations in a Large Dryland River of the Murray-Darling Basin, Australia". University of Canberra. Resource, Environmental & Heritage Sciences, 2007. http://erl.canberra.edu.au./public/adt-AUC20070807.112943.
Pełny tekst źródłaAbolghasemi, Riseh Hamideh. "Optimization of the Kootenay River hydroelectric system with a linear programming model". Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/5792.
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