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 24 for “"sediment budget"”.
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Beach development, sediment budget and coastal erosion at Holderness.
… exist among offshore conditions, beach sediment transport and morphology, and till cliff erosion. Modelled and measured sediment transport rates established for the Holderness coast are similar to those on comparable coasts elsewhere. The direction of sediment drift depends on wave …
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Geomorphic and Fluvial Response to Recent Permafrost Disturbances in a High Arctic River, Cape Bounty, Nunavut
Using a sediment budget approach, suspended sediment transport dynamics were studied over the 2010 summer runoff season in the 8 km2 West River catchment at the Cape Bounty Arctic Watershed Observatory (CBAWO), Melville Island, Nunavut. Research was carried out in an effort to determine the longer …
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Post-Orogenic Exhumation and Glacial Erosion on the Flanks of the North Atlantic
… the landscape. Following deglaciation Scotland's sediment budget remains dominated by glaciogenic sediment. In the fourth chapter, magnitudes of background exhumation in the Presidential and Carter Ranges of the White Mountains, New Hampshire were compared to magnitudes of glacial erosion. The …
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Exploring fine sediment dynamics and the uncertainties associated with sediment fingerprinting in the Nene river basin, UK
… and ecological status of freshwater bodies. Fine sediment has been shown to be a major cause of the degradation of lakes and rivers, and as a result research in geomorphology has been directed towards the understanding of fine sediment dynamics. It was identified by a review of published …
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SAMPLING AND MODELING OF SEDIMENT TRANSPORT AND RESERVOIR EROSION FOLLOWING DAM REMOVAL: MILLTOWN DAM, MONTANA
… bedload transport in combination with suspended sediment and discharge data collected by the USGS illustrate the rates, magnitudes and processes by which reservoir sediment evacuated the Milltown Reservoir after the 2008 removal of Milltown Dam from just downstream of the confluence of the …
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SAMPLING AND MODELING OF SEDIMENT TRANSPORT AND RESERVOIR EROSION FOLLOWING DAM REMOVAL: MILLTOWN DAM, MONTANA
… bedload transport in combination with suspended sediment and discharge data collected by the USGS illustrate the rates, magnitudes and processes by which reservoir sediment evacuated the Milltown Reservoir after the 2008 removal of Milltown Dam from just downstream of the confluence of the …
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The potential alternative uses of dredged material in the Humber Estuary
… Humber Estuary whilst taking into account the sediment composition and hydrodynamics, as well as the local need, economics and adherence to the 7 tenets of sustainable development.The potential use locations were based primarily on the sites that have been identified by the Environment Agency …
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Sediment circulation in mixed gravel and shingle bayhead beaches on the South East Dorset coast.
… the morphological characteristics, processes and sedimentology of five local mixed gravel and shingle beaches. A conceptual framework of process response has been adopted which considers energy inputs, sediment transport and coastal morphology, under conditions of limited sediment supply and a …
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Holocene sedimentary history of Chilliwack Valley, Northern Cascade Mountains
I seek to reconstruct the balance between sediment storage and yield across multiple drainage basin scales in a large (1 230 km2) watershed in the Northern Cascade range, British Columbia and Washington. Chilliwack Valley and surrounding area has been the site of numerous studies that have detailed …
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Medium-term response of lowland river reaches to changes in upland land use.
… construction of a contemporary lowland channel sediment budget. Local inputs of bed load from composite bank erosion are shown to dominate in the budget and reaches of maximum instability are shown to correspond with the location of these composite banks. Additionally. flood magnitude and …
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Sediment in forested and logged gullies, coastal British Columbia
This study examines sediment storage and transfers in gullies of coastal British Columbia, and how logging affects sediment storage and transfers. Both fluvial and debris flow transport of sediment occur in gullies, and the amount of fluvial transport of sediment which occurs will affect the …
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Managed realignment in the Humber estuary: factors influencing sedimentation
… the fast accretion rates at PHS, researches the sediment properties, calculates a sediment budget and produces a conceptual model for fast accreting managed realignment sites. Results have shown that the initial fast accretion rates continued on the site to the end of the monitoring period five …
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Multi-Scale detection, mapping, and modelling geomorphic change in gravel-bed rivers with UAV remote sensing
… reach volumetric analysis reveals a negative sediment budget approximating a net loss of 250m3/year. Budgetary segregation shows 22% of eroded material is sourced from the banks of the inset wandering margin and is a possible cause of a general fining (30% reduction in mean b axis) of bed …
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Prediction of sedimentation and bank erosion due to the construction of Kahang Dam
… of tools for better understanding of the sediment dynamics and riverbank erosion downstream the dam will be of great benefit to researchers and policymakers. The present research employs the use of field techniques and estimation models to improve the (i) prediction of suspended sediment …
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Soft cliff retreat adjacent to coastal defences, with particular reference to Holderness and Christchurch Bay, UK
Coastal defences reduce sediment input and modify the sediment budget, usually resulting in a sediment deficit down-drift and an accumulation up-drift. This process results in set-back adjacent to defences. Three types of set-back were identified and these occur due to the:<br/><br/>• terminal …
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Massenbilanzen holozäner Sedimente am südlichen und mittleren Oberrhein
… Arbeit befasst sich mit den holozänen Sedimenten, die seit Beginn des Ackerbaus vor etwa 7500 Jahren im südlichen Oberrheintiefland in Form von Auenlehmen und Kolluvien abgelagert wurden. Ziel war es, diese Sedimente in ihrer räumlichen Ausdehnung und Mächtigkeit zu erfassen und eine …
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An evaluation of particulate phosphorus storage in an agricultural estuary
Knowledge of fine sediment delivery (both timing and loading) is fundamental to the assessment of non-point source pollution in estuarine environments. This study comprised three key components that led to the development of a fine sediment and particulate associated phosphorus budget in a typical …
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Reservoir sedimentation in dryland catchments : modelling and management
… strongly on storage in surface reservoirs and sediment deposition in these reservoirs affects adversely the water storage. In order to reproduce the complex behaviour of sediment deposition in reservoirs located in semi-arid environments and the effects of using sediment management techniques, …
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The application of historical data and computational methods for investigating causes of long-term morphological change in estuaries : a case study of the Mersey Estuary, UK
… perturbation. Changes to tidal flow and related sediment transport patterns outside the estuary resulting from training wall construction are examined with regard to the stability of the estuary system. The results from computational hydrodynamic models representing the years 1906, 1936 and 1977 …
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Evaluation of New Zealand estuarine water properties using remote sensing
… However, due to the inputs of nutrients, sediments and pollutants from the surrounding landscape, light availability and primary productivity can be strongly restricted, which may trigger rapid ecological change over time and cause substantial loss of coastal flora and fauna. This thesis …
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