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 23 for “"River catchments"”.
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Weathering and riverine fluxes in pristine and controlled river catchments in Iceland
… management has extensively altered the worlds’ river systems through impoundments and channel diversions to meet mankind’s increasing demand for water, energy, and transportation. One of these altered river systems is the, now dammed, glacial river Jökulsá á Dal in Eastern Iceland. Construction …
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The GREAT-ER model as a tool for chemical risk assessment and management for Chinese river catchments
… Regional Exposure Assessment Tool for European Rivers (GREAT-ER) model was developed for this purpose. Its application in China would represent a valuable water quality management tool. However, the data requirements for the parameterization of GREAT-ER are difficult to meet, especially in …
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Assessing sustainable water, energy and food nexus smart innovations, technologies and practices in Luvuvhu and Nzhelele River catchments areas, Vhembe District Municipality, Limpopo province, South Africa.
… innovation and practices in Luvuvhu and Nzhelele River Catchments Areas, Limpopo Province, South Africa. Subsequently, face-to-face surveys were undertaken from 9 July to 30 November 2022 for individual households and focus group discussions (FGD) were conducted within communities under the …
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Detrital muscovite thermochronology in two drainage basins in western Bhutan
… distributions of detrital minerals in the two river catchments of the Punatsang chu and the Wang chu. Muscovites from five samples of Wang chu river sands yield ages (corresponding roughly to the time of bedrock cooling through a temperature of ca.350°C) between 9.37± 0.08 Ma and 13.98 ± 0.08 …
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Parameter optimisation of river water quality models using genetic algorithms
Rivers can provide valuable supply of drinking water for humans, irrigation water to farmlands, water for hydropower and home for many aquatic ecosystems. However, due to population increase and its adverse effects on the rivers, inappropriate farming activities in the river catchments, and other …
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Using wildlife to biomonitor for antimicrobial resistance in the Scottish environment
… invertebrate gut, across three distinct river catchments. Using the breakpoint plate method, no significant difference in the prevalence of tetracycline or cefpodoxime resistance was observed between the three catchments. However, isolate based investigation revealed a much broader range …
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From landscape to freshwater invertebrates: understanding the effects of peatland restoration on Atlantic Salmon (Salmo salar) habitat in the Flow Country
… that inhabit many peatland-dominated upland river catchments. This study examines the effects of two common peatland restoration techniques, drain blocking and forest-to-bog, within the Flow Country blanket bog. We focused on how these restoration activities impact both stream and river water …
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Simulation of catchment runoff, erosion and sediment transport using a transient numerical model for Mlalazi catchment
Catchments and estuaries are fragile systems that are prone to serious degradation from many different anthropogenic impacts. Much research has been conducted on developing an understanding of the fluvial processes in river catchments and in estuary dynamics. Many of the anthropogenic impacts on …
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The effects of bog restoration in formerly afforested peatlands on water quality and aquatic carbon fluxes
… restoration on pore-, surface-, stream- and river water quality in the short-term (0-1) years post-restoration, where the effects of restoration are disturbance-related. We also investigated restoration progress across a chronosequence of restoration sites using pore- and surface-water …
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Soil erosion and suspended sediment dynamics in intensive agricultural catchments
… delivery 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 …
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Swan-plant interactions in a chalk river catchment.
… interaction: the grazing of plants in chalk river catchments, principally the submerged macrophyte water crowfoot (Ranunculus penicillatus ssp. pseudofluitans (Syne) S.D. Webster) and terrestrial pasture grass species, by flocks of non-breeding mute swans (Cygnus olor Gmelin, 1789). This …
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Analysis and visualisation of digital elevation data for catchment management
River catchments are an obvious scale for soil and water resources management, since their shape and characteristics control the pathways and fluxes of water and sediment. Digital Elevation Models (DEMs) are widely used to simulate overland water paths in hydrological models. However, all DEMs are …
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A trace element study of sediments from the Olifants River estuary, the Berg River estuary, and the off-shore Mud Belt
… of trace elements for the Olifants and Berg river catchments by focusing on the sediments of the estuaries. The dominant industry in both catchments is agriculture and there exists relatively little urban sprawl. Two sediment samples taken from the offshore mud belt in the vicinity of the two …
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Extracting value from patterns in routinely collected, high-frequency water quality data in rivers supplying drinking water treatment works
… concentration-discharge (c-q) relationships in rivers can be used to describe the complex interactions and combined effects of catchment processes affecting sources, mobilisation, and the transport of contaminants. Long-term monitoring, routine sampling, and targeted storm sampling have …
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Extracting value from patterns in routinely collected, high-frequency water quality data in rivers supplying drinking water treatment works
… concentration-discharge (c-q) relationships in rivers can be used to describe the complex interactions and combined effects of catchment processes affecting sources, mobilisation, and the transport of contaminants. Long-term monitoring, routine sampling, and targeted storm sampling have …
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Hydrological assessment and modelling of the River Fani Catchment, Albania
… years. Rubik lies within the Catchment of the River Fani which is remote, ungauged and characterised by frequent flooding, erosion and deforestation. Over the years these processes have had a huge environmental and socioeconomic impact on the residents of Rubik. Aid In Action was concerned …
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Mapping and Assessment of changes in ecosystem service delivery - a historical perspective on the Tweed catchment, Scotland - UK
For centuries, river catchments and their constituent habitats have been altered and modified through various human activities to maximise provision of tangible benefits like food and water, while impacting on their capacity to provide other less obvious but equally important benefits for human …
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Detection of non-native freshwater fishes using environmental DNA
… gibbosus and Leucaspius delineatus in two river catchments in southern England (Sussex Ouse and Hampshire Test). This demonstrated the utility of the method for rapidly assessing distribution, with the results broadly matching previous knowledge gained through conventional survey methods, …
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The Photodegradation of Diazepam and its Human Metabolites in Water
… PhACs have been detected in wastewater, river water, marine waters and even sewage sludge and soil. Since PhACs are developed with the intention of stimulating or inhibiting physiological responses, these findings have prompted concern over their environmental fate and potential adverse …
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Ecological and recreational interactions of the native pike Esox lucius and the invasive pikeperch Sander lucioperca in England.
… populations that dispersed through many river catchments. Due to their piscivory and correspondingly high trophic positions, their ecological impacts on prey fish populations are often considered, but their interactions with and potential impact upon native large-bodied piscivorous fish …
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