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Showing 1 to 20 of 32 for “"Sediment quality"”.
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Assesment of Water and Sediment Quality in an Abandoned Mine Lands, Tuscaloosa County, Alabama
… Surface water samples were collected monthly and sediment samples were obtained quarterly from ten locations (SW1–SW10) for a 2-year period between June 2022 and May 2024.Stream water pH remained circum-neutral (7–8) throughout the study period, but elevated conductivity (600–1800 µS/cm) and …
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Evaluating the impacts of an urban catchment on water and sediment quality of a receiving river
… achieve this a range of measures to improve the quality of water, particularly in urban areas, are required. It is within this context that this thesis uses a combination of field, laboratory and desk-based studies to identify contaminant loadings and their distributions within water bodies …
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Evaluation of approaches for the derivation of defensible sediment quality guidelines for application at Saskatchewan uranium operations
Sediment quality guidelines (SQGs) or values (SQVs) are used to assess the potential risk of contaminants in sediment to aquatic organisms, specifically benthic invertebrates. The objectives of this research were to evaluate SQGs derived specifically for use by the uranium industry in Canada, …
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Model of PAH and PCB bioaccumulation in Mya arenaria and application for site assessment in conjunction with sediment quality screening criteria
A review of six methods for deriving sediment quality criteria SQC was conducted. Each approach was analyzed according to cost, difficulty, applicability and reliability. Results of this analysis led to the recommendation that the state of Massachusetts should use a combination of the Equilibrium …
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Model of PAH and PCB bioaccumulation in Mya arenaria and application for site assessment in conjunction with sediment quality screening criteria
Thesis (M. Eng. in Ocean Engineering)--Joint Program in Oceanography/Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Mechanical Engineering; and the Woods Hole Oceanographic Institution), 1999.
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The Impact of a Rapidly Growing Community on Surface Water Quality: a Study of Branson, Missouri and Lake Taneycomo in Southwestern Missouri
This study monitors the water and sediment quality of Lake Taneycomo in southwestern Missouri, Ozarks region. The lake is partially bordered to the north by the rapidly growing tourism community of Branson, Missouri. The source water is primarily from Table Rock Lake, which is located west of Lake …
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River Sediment Sampling and Environment Quality Standards: A Case Study of the Ravensbourne River
Sediment is a major sink for heavy metals in river, and poses significant risks not only to river quality but also to aquatic and benthic organisms. At present in the UK, there are no mandatory sediment quality standards. This is partly due to insufficient toxicity data but also due to problems …
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Heavy metal contamination in the Black River, Cape Town
Urban river sediments are often contaminated as a result of development and anthropocentric activity, and the Black River in Cape Town is a prime example of a river system suffering from unsustainable development. Methods of deter mining total and background concentrations of selected heavy metals …
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Ecological Management Strategies for Impounded Harbours
… was conducted in order to quantify water and sediment quality changes arising from the impoundment of Sutton Harbour, Plymouth (UK). Spore tracer studies revealed that 95 % water renewal times increased from 45 h to 72 h after impoundment. Semi-diurnal (tidal) salinity variations of circa 5 …
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A Comparison of Biotic and Abiotic Components Between a Spring-Fed and a Predominantly Lake-Fed Creek on Southern Vancouver Island, British Columbia
… Creek is spring-fed and flows through forest. Sediment, Western Skunk Cabbage (Lysichiton americanus), invertebrates, water quality and discharge were sampled over a one-year period. Sediment and plant samples were analysed using X-ray Fluorescence for arsenic, cadmium, chromium, copper, …
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Levels of Heavy Metals in Sediment Samples from Select Creeks in Metro Vancouver, BC, Canada
… in surface water and metal concentrations in sediments. The pH, total dissolved solids and electrical conductivity in surface water samples ranged from 5.50 to 8.27, 14.0 to 410.0 ppm, and 19.0 to 903.0 µS/cm, respectively, with no discernible relationship between the surrounding land use and …
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Impacts of artisanal and large scale gold mining on tropical rivers in West Africa: A case study from the Brong Ahafo Region of Ghana
… LSM impacted the respective river’s water and sediment quality, macroinvertebrate and microbial (Archaea and Bacteria) community structures and resulted in mercury biomagnification in fish. ASGM impact on river water and sediment quality was determined using a reversed BACI (Before/After and …
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Water quality assessment and potential ecological risk of trace metals in sediments of some selected wetland across Limpopo Province; South Africa
… This study was conducted to evaluate water quality and the potential ecological risk due to trace metals in sediments across wetlands in Limpopo Province. The samples' physicochemical parameters were tested in the field and the laboratory. All the instruments used to test the physicochemical …
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Quantifying distribution and transport of contaminated sediments in the St. Clair River: The GIS approach (Ontario, Michigan).
… of toxic chemicals have accumulated in bottom sediments. The highest level of contamination was consistently found in the narrow strip of sediments adjacent to the industrial complex (Study Area #1), with the estimated planar area of 75,000 m 2 (18 acres). To assess spatial distribution of the …
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Assessing Industrial Contamination of Brockport Creek After Removal of Contaminated Sediment
… a tributary following removal of contaminated sediment from the tributary in 2002. Before the cleanup, PCB concentrations in sediments ranged from 1, 730 to 34,900 µg/kg; after the cleanup they ranged from 288 to 432 µg/kg, below water quality criteria for aquatic organisms and human health. …
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Environmental impact of mine drainage and its treatment on aquatic communities
… is used to discern the effects of water and sediment related variables and elucidate the most important variables in the impact of mine pollution on freshwater macroinvertebrate communities. The implications of this are to be considered for improving mine water remediation techniques and work …
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Characterization of Metal Concentrations in Sediment and Water of the Swan Creek Watershed, A Major Tributary in the Maumee River Area of Concern
… by the International Joint Commission’s Water Quality Board, due in part to the presence of heavy metal and organic chemical sediment contamination detrimental to the overall quality of the Great Lakes. The primary objective of this study is to determine current level of metals in water and …
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Microbial risk assessment for recreational use of the Kranji Reservoir, Singapore
… Reservoir to determine the microbial water and sediment quality of the reservoir for use in a model that predicts the risk of gastrointestinal illness due to recreational use of the reservoir. Water samples were collected at seven locations throughout the reservoir and sediment samples were …
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Assessment of heavy metal contamination in flooding area case study at Sungai Pahang and Sungai Kelantan
… caused the rivers to faced serious water and sediment pollution problems. Floods speed up the metal mobilization in rivers. The first objective of this study is to determine heavy metal contamination in environmental samples obtained from flood prone areas in Pahang River and Kelantan River. …
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Determination and speciation of mercury in sediment and related samples from Greece and Scotland
… speciation and relationships of Hg with other sediment parameters in contaminated environments was examined. Field application of the colorimetric method indicated Hg concentrations in sediments from West Scotland, U.K., and Kifissos River, Greece, were below Canadian sediment quality guideline …
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