Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 365 for “"Catchments"”.
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Hydrological modeling of mountain catchments in Central Asia
… observed streamflow increases in two headwater catchments of the Tarim River over the recent decades. This simulation-based approach for trend attribution was complemented by a data-based approach. The hydrological model was calibrated to discharge and glacier mass balance data and considered …
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Reservoir sedimentation in dryland catchments : modelling and management
Semi-arid environments are mainly characterized by scarce water resources and are usually subject to risks of water stress. In these regions, water supply for drinking and irrigation purposes depends strongly on storage in surface reservoirs and sediment deposition in these reservoirs affects …
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A knowledge-based approach to modelling fast response catchments
… in to flood forecasting on rapid response catchments, using knowledge based principles. Extensive use was made of high resolution single site radar data from the radar site at Hameldon Hill in North West England. Actual storm events and synthetic precipitation data were used in an attempt …
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Three Quaternary Catchments in Vhembe District Municipality: A GIS Approach
… water safety risks in three quaternary catchments within the Vhembe District Municipality (VDM) using Geographic Information Systems (GIS). The aim is to assess the abundance and distribution of faecal indicator bacteria (FIB) in surface and groundwater sources across wet and dry seasons …
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Environmental flows for English rivers: a focus on modified catchments
… located across the River Trent and Great Ouse catchments of central England, using a dataset of 48 stations and approximately 1000 station-years. Analyses highlight a variety of ‘ecological drought’ responses, in magnitude, timing and duration, with extreme low flows being rarely observed on …
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Soil erosion and suspended sediment dynamics in intensive agricultural catchments
… of fine sediment from agricultural river catchments to aquatic ecosystems can degrade chemical water quality and ecological habitats. Management of accelerated soil losses and the transmission of sediment-associated agricultural pollutants, such as phosphorus, is required to mitigate the …
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Combining smart model diagnostics and effective data collection for snow catchments
Complete protection against flood risks by structural measures is impossible. Therefore flood prediction is important for flood risk management. Good explanatory power of flood models requires a meaningful representation of bio-physical processes. Therefore great interest exists to improve the …
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Biogeochemical investigations of methane-rich groundwaters in high Arctic glacial catchments
… Svalbard, groundwater systems within glaciated catchments are found to be bringing to the surface deep-seated methane gas that was previously trapped beneath glaciers and permafrost in the Arctic. In this thesis, I estimate the amount of methane being released by such springs and discuss its …
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Instrumenting Wildlife Water Developments to Collect Hydrometeorologic Data in Remote Nevada Catchments
… especially in remote, mid- to high-elevation catchments. Wildlife water developments, or guzzlers, are anthropogenic catchments designed to capture and store precipitation, making the water available to wildlife throughout the year. Guzzlers are typically installed in remote, mid- to …
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Weathering and riverine fluxes in pristine and controlled river catchments in Iceland
… to demonstrate natural changes within the river catchments and to assess the effect of climate on chemical weathering rates within the catchment. There is a positive correlation between riverine discharge and suspended load but the correlation is negative between discharge and the concentrations …
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Modelling runoff generation and connectivity for semi-arid hillslopes and small catchments
… is complex and varies significantly between catchments. This research has shown that there are two key themes in determining the amount of runoff reaching the channel network: the interplay between the distribution of flow path lengths generated during a storm and the distributions of flow …
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Streamflow Generation in alpine Catchments: The role of hydrological and geochemical information
… provide essential ecosystem services. These catchments are particularly sensitive to temperature changes and may suer significant changes because of climate variations. Thus, identifying the main mechanisms controlling streamflow generation and understanding the nature and variability of …
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Analysis and management of low flows in small catchments of Brandenburg, Germany
… that future decrease in runoff is likely for catchments in Brandenburg, Germany. Depending on the first-order controls on low flows, different adaption measures are expected to be appropriate. Small catchments were analyzed because they are expected to be more vulnerable to a changing climate …
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