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 “"siltation"”.
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Distributional analysis of the freshwater mussel fauna of the Tennessee River system, with special reference to possible limiting effects of siltation
… to species abundance. Experiments on effects of siltation indicated that silt can be a significant limiting factor to mussel distribution. Transplant studies showed that mussels transplanted into heavily silted areas exhibited poor survival over a one year period compared to mussels moved to …
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The Food Habits of the Amphipod Gammarus Pseudolimnaeus (Holsinger) in the Upper Region of Lake Taneycomo as Related to the Benthic Diatom (Bacillariophyceae) Microflora
… of factors not identified by this study. Siltation is discussed as a possible cause of the differences in diatom diversity and also as a possible cause of the removal of G. pseudolimnaeus from the benthos of the lake.
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A Descriptive Survey of Freshwater Unionidae Bivalves in Five Creeks Located in West Central Georgia
… and abundance of Unionidae species include heavy siltation caused by anthropogenic stream-side activities, impoundments, and absence of specific habitat types or environmental conditions.</p>
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Some effects of abandoned manganese strip mines in Smyth County, Virginia on stream ecology
… than Crigger Creek, a comparable control stream. Siltation is probably the main contributing factor. Bedload was much greater in affected streams than in control streams. Although volume of bedload was high in Blue Spring Creek, which drains a reclaimed area, particle size distribution of the …
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Renegotiating the Edge: Creating an Inspired Reality in the Potomac River Watershed
… marginalization of the community in the wake of siltation and urban sprawl. The resulting proposal reconnects the community with the creek, and fulfills an intention of the original Potomac Report: to spark inspired realities along the river's 400-mile course.
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A Study of Beaver Pond Morphology and Site Characteristics After Disturbance in Eastern Glacier National Park, Montana
… Saint Mary Ponds appear to be undergoing rapid siltation following the 2006 forest fire within the drainage basin.
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Particle Size Distribution Analysis of a Mining-Impacted Gravel-Bed Stream in Ohio Using a Hybrid Sediment Sampling Technique
… well as examining possible relationships between siltation and indicators of ecological health in Leading Creek. By combining clay grid and adhesive sampling methods, the hybrid technique consistently achieved an effective particle size sampling range of 0.05 mm (1.97 x 10-3 in) to over 300 mm …
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Evaluating sediment storage time for improved management of river basin pollution
… and to tackle the global challenge of siltation and associated pollution.
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Downstream change in channel hydraulics along the River Severn, UK
… of channel stability, sediment transport and siltation, flood generation and aquatic habitats. However, little attention has been given to quantifying the detailed spatial and temporal variability of channel hydraulic parameters, despite considerable attention to reach-scale processes. This …
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Multiple-scale habitat models of benthic fish abundance in riffles
… use of depth, velocity, substrate, and siltation level by all three species during summer low flows was evident. Habitat use characteristics were not transferable, as depths and velocities associated with high fish densities varied between reaches. Univariate and multivariate habitat …
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Turbidity and Nutrient Response to Storm Events in the Wissahickon Creek, Suburban Philadelphia, PA
… for nutrients (NO3-, PO43-, NO2-, and CBOD5) and siltation. A new TMDL for total phosphorus (TP) was proposed in 2015, despite minimal data on the effectiveness of the 2003 TMDLs. This new proposal was met with concern, suggesting more data must be collected to better understand impairment in the …
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Coal waste deposition and the distribution of freshwater mussels in the Powell River, Virginia
… compared to previous data. Contamination and siltation from coal washing facilities and abandoned mine lands are suspected of contributing to this decline.
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Relation of Habitat to Fish Community Characteristics in Small South Dakota Impoundments
… to have been impacted by moderate to severe siltation rates since their creation in the 1930's. Drought conditions during summer 2002 resulted in low water l evels in several impoundments and thus emergent vegetation was likely under-represented in these impoundments. Accuracy assessment of …
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Effects of sedimentation on water-linked sectors in the Lusitu river catchment in southern Zambia.
… rock formations. There was large-scale siltation in the downstream section which measured 2,863,913.78m3 with mean sediment depth of 3.13m. Due to heavy sedimentation, the downstream of the Lusitu River was found to have lost 68.34% of its channel storage capacity. The intensity of …
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Effects of sedimentation on water-linked sectors in the Lusitu river catchment in southern Zambia.
… rock formations. There was large-scale siltation in the downstream section which measured 2,863,913.78m3 with mean sediment depth of 3.13m. Due to heavy sedimentation, the downstream of the Lusitu River was found to have lost 68.34% of its channel storage capacity. The intensity of …
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Application of GIS and Remote Sensing techniques to evaluate the impact of land cover and land use changes on the hydrology and water resources of Luvuvhu River Catchment in Limpopo Province, South Africa.
… as the dominant erosion type contributing to siltation and water pollution in rivers. The study recommends close monitoring and sustained enforcement of the rural land use regulations to prevent the conversion of land to urban land use.
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Two-phase Flow Modelling of Mud Flocs Sedimentation in Coastal Waters
… waters. Various engineering problems such as siltation of navigation channels and polluting coastal environment can be caused by the cohesive sediments. To solve these problems, field/lab experiments and numerical models are widely used to study the cohesive sediment transport …
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Managing the Water Quality of the Zandvlei Estuary using Sustainable Drainage Systems in the Diep Catchment
… most significant problems are eutrophication and siltation, which have occurred in the estuary due to elevated nutrient and sediment levels. Increased Total Inorganic Nitrogen (TIN) and Soluble Ready Phosphorus (SRP) are the primary causes of eutrophication in receiving water bodies. The excessive …
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Behavior and conservation: hellbender reproductive behavioral responses to poor water quality and the value of private lands research for conservation outreach
… protect their offspring from low oxygen and high siltation, and I assess the possibility of trade-offs between parental care behaviors that benefit the eggs and self-maintenance behaviors that benefit the parent. I find that guarding male hellbenders increase both their parental care behaviors and …
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Mineral Scale Buildup on Lined Versus Traditional Polyethylene Pipe Materials Subjected to Mine Influenced Waters
… can lead to problems such as a sedimentation and siltation, undesirable changes in pH and/or precipitation of metals and salts, and addition of particular stressors for various aquatic organisms. As such, these waters are frequently captured and treated on-site in systems requiring extensive …
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