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 80 for “"catchment scale"”.
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Catchment scale modelling of micro and emerging pollutants
… introduced into a watershed and sampled at the catchment outlet depends on many environmental, chemical and hydro-climatological forces.Moreover, if the solutes are micro and emerging pollutants (i.e. pharmaceuticals), which are non-regulated contaminants not routinely monitored but …
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Rural Land Management Impacts on Catchment Scale Flood Risk
… downstream flood risk remains a challenge. Field scale studies have found that changing land management practices does affect local runoff and streamflow. Upscaling these effects to the catchment scale continues to be problematic,both conceptually and, more importantly, methodologically. …
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Diagnostic analysis of runoff partitioning at the catchment scale
… of the controls runoff partitioning at the catchment scale is necessary to constrain and improve hydrological predictions at catchment scale, especially in ungauged catchments. This dissertation systematically investigates the controls of climate, soil and topography on runoff partitioning …
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Sediment transport modelling at the catchment scale in Alpine streams
… to enhance sediment transport modelling at the catchment scale. In particular, the present work aims at the evaluation of the efficiency of the CASCADE basin-scale sediment-transport model and its sensitivity to the local hydro-morphological conditions; to evaluate the distance from the …
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Catchment Scale Downscaling of Hydroclimatic Variables from General Circulation Model Outputs
… GCM outputs does not permit their direct use in catchment scale studies. Therefore either dynamic or statistical downscaling techniques are used for linking GCM outputs to catchment scale hydroclimatic variables.
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Andean sediment response to natural and anthropogenic changes at the catchment scale
… nexus, particularly in glacier-fed mountainous catchments. Soil erosion, driven by both natural and anthropogenic activities, further exacerbates the challenge for resource security. Soil erosion is contributing to increased levels of sediment in river systems threatening crucial river …
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Nano- to catchment-scale investigations of metal transport processes in mining-impacted river systems
… This thesis aims to identify nano- to catchment-scale drivers of metal dispersion by: assessing the role of river catchment geomorphology in metal storage; quantifying metal sources across streamflow conditions; and investigating the metal-bearing nanoparticle flux in the river water. …
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CATCHMENT SCALE MONITORING AND MODELLING OF PHOSPHORUS USING FLOW INJECTION ANALYSIS AND AN EXPORT COEFFICIENT MODEL
… to predict phosphorus loading in the River Frome catchment, Dorset on an armual and seasonal (monthly) basis is presented in Chapter Two. The model predicted an annual (1998) phosphorus load of 25,605 kg yr'\ compared with an observed (measured) value of 23,400 kg yr'V Monthly loads agreed well …
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Susceptibility Of Headwater Catchment Hydrology To Persistent Droughts And Forest Structure Modification - A Plot To Catchment Scale Analysis
Headwater catchments across the Western United States are critical environments to natural ecosystems and are a vital component of water resources to many communities and industries and may be strongly affected by changing climate and altered disturbance regimes. To better quantify how these …
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The Impacts of Climate and Landscape Change on Catchment Scale Material Transport in High Mountain and Seasonally Cold Regions
… investigates material fluxes at the watershed scale in high mountain and seasonally cold regions in an effort to better understand the processes impacting their magnitude, timing, and release and the broader implications for the management of water resources. Chapter 1 investigates these …
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The hydrological flux of organic carbon at the catchment scale: a case study in the Cotter River catchment, Australia
… in water and enter the hydrological flux at the catchment scale. A significant quantity of total organic carbon (TOC) sequestered through photosynthesis may be exported from the landscape through the hydrological flux and stored in downstream stocks.¶ This thesis presents a catchment-scale case …
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The hydrological flux of organic carbon at the catchment scale: a case study in the Cotter River catchment, Australia
… in water and enter the hydrological flux at the catchment scale. A significant quantity of total organic carbon (TOC) sequestered through photosynthesis may be exported from the landscape through the hydrological flux and stored in downstream stocks.¶ This thesis presents a catchment-scale case …
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Are all wetland models the same? Comparing wetland models and streamflow regulation of catchment-scale hydrological modelling tools under a changing climate
… characteristics, processes and impacts on catchment streamflow in different modelling tools and models (i.e. setups in a tool). Evaluating wetland models supports wetland-inclusive modelling and ensures that a wetland model is hydrologically sound and suitable. An unchannelled valley-bottom …
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A multifarious comparative ecotoxicological approach on a catchment scale from three mine wastelands for improved environmental management and risk assessment: integrating abiotic, biotic and agroecosystem approaches
… alluding to this, an ecotoxicology study at the catchment scale was conducted seasonally for three years on water resources (Nselaki Stream, Fikondo Stream and Mululu Streams) and food crops in close proximity to the selected TSFs. The potential of phytomining technologies using native herbaceous …
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The environmental behaviour of beryllium-7 and implications for its use as a sediment tracer
… been fully underpinned by supporting data. As a catchment management tool 7Be offers unique potential to assess the effects of recent land use or climate change but further research is required to provide confidence in key data and elucidate sources of uncertainty. Through a range of laboratory …
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Impacts of Climate Change in Snowmelt-Dominated Alpine Catchments: Development and Assessment of Comparative Methods to Quantify the Role of Dynamic Storage and Subsurface Hydrologic Processes
… using long-term data from two snowmelt dominated catchments to investigate the response of hydrologic processes at different temporal and spatial scales. First, results from an hourly spatially-distributed energy balance snowmelt model were spatially and temporally aggregated to provide daily, …
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Interactions between hydrology and biogeochemistry within riparian wetlands
… and biogeochemistry at various spatio-temporal scales are important control mechanisms within terrestrial and aquatic ecosystems and exist among different compartments and transition interfaces. Understanding the fundamental mechanistic couplings between hydrological and biogeochemical processes …
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Evaluation of sampling techniques to characterize topographically-dependent variability for soil moisture downscaling
… patterns are an important consideration in many catchment-scale hydrologic applications. Unfortunately, estimating soil moisture patterns at resolutions that are appropriate for these applications (e.g., grid cells with a linear dimension of 10 to 50 m) is difficult. Downscaling methods can be …
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Spatial arrangement of stormwater infiltration affects partitioning of subsurface storage and baseflow timing
… of infiltration focused facilities may affect catchment scale water-balances, including subsurface storage and streamflow. In particular, little focus has been given to relating site-scale behavior with catchment scale response. This project used a physically-based numerical model, ParFlow, to …
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Exploring the Hydroclimatology of Floods: From Detection to Attribution
… through linking hydrological extremes to large-scale climate drivers. In Ireland, recent years have highlighted vulnerability to flooding yet little research has been undertaken exploring hydroclimatic signatures of change in extremes at different scales, in part due to a lack of quality assured …
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