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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 34 for “"River water quality"”.
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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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Tolerance Determination of Certain Benthic Invertebrates as Indicators in River Water Quality Monitoring
River survey work which assessed biological and chemical status of over one hundred randomly selected rithron stations spanning four Water Authorities is documented. Water quality has been correlated with benthic macroinvertebrate distribution and alteration in community structure, with specific …
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Performance of septic tanks for pharmaceutical removal and their impact to river water quality.
Pharmaceuticals enter surface water after incomplete removal in wastewater treatment works (WWTWs) and are known for their potential ecotoxicological hazard to the environment. Septic tanks (STs) treat wastewater of individual houses and small communities in rural and semi-urban areas and are an …
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Implementation of the IWA River Water Quality Model no. 1 in US EPA WASP 5.0
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2002.
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Ecological studies on:(a) the use of colonisation samplers in relation to biological surveillance of river water quality (b) the requirements of freshwater gastropoda
… scoring system was necessary for lowland rivers. Macroinvertebrates colonising S. Auf. U. in simulated streams, lowland rivers and the R. Churnet reflected water quality. A variety of pollution and diversity indexes were applied to results from lowland river sites. Instead of these, it was …
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Demand for Water Quality: Empirical Evidence from a Knowledge, Attitude, Behavior, and Choice Experiment Survey about the Bagmati River in Kathmandu, Nepal
Surface water ecosystems such as rivers and lakes provide many benefits to the society. These benefits include both market goods such as drinking water, outdoor recreation, fisheries, as well as non market goods such as habitats for aquatic life, biodiversity, aesthetic attributes, and religious …
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The effect of treated wastewater effluent on the water quality of the Natalspruit river
Lack of effective wastewater management strategies poses a serious threat to the environment and human health around the world. South Africa's freshwater resources are threatened by human influence and dwindling at an alarming rate. Global climate change is expected to exacerbate this stress unless …
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Analisi degli aspetti di qualità nella gestione dei sistemi di drenaggio urbano attraverso modellazione numerica e indagini di campo
In order to protect river water quality, highly affected in urban areas by continuos as intermittent immissions, it is necessary to adopt measures to intercept and treat these polluted flows. In particular during rain events, river water quality is affected by CSOs activation. Built in order to …
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Mapping Groundwater Discharges to Rivers near Oil Sands Projects
Groundwater discharges in the western Canadian oil sands region impact river water quality. Mapping groundwater discharges into rivers in the oil sands region is important to ensure wastewater and steam injections remain sequestered, rather than eventually resurfacing. Saline springs comprised of …
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The sources and cycles of iron and manganese in surface water supplies
Evaluation of the sources and cycles of water quality contaminants in watersheds is critical for effective surface water resource management. In particular, iron (Fe) and manganese (Mn), commonly found in rocks and sediments, have adverse impacts on water quality. However, controlling Fe and Mn in …
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Quantile autoregression with censored data
… applications of the algorithm to the Samish river water quality study and dry decomposition of NH4 demonstrate the merits of the proposed method.
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Norovirus in Recreational Waters in Arizona
… infections can occur from drinking contaminated water or eating contaminated food, contact with contaminated fomites, inhalation of aerosolized vomitus, or person to person spread. Outbreaks of norovirus following exposure to contaminated recreational water have been documented, as swimmers and …
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The design of a water quality management system for Nigerian rivers
There is an intricate relationship between waterquantity and quality, development, human health andwelfare, and aquatic life.Water availability is, however, variable inlocation and time. The increase in human populations andvarious anthropogenic activities have exertedsignificant impacts on the …
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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
… contribute to carbon storage, biodiversity, and water quality regulation. However, they have been severely impacted by various anthropogenic activities, including burning, drainage, over-grazing, and afforestation with non-native conifer plantations. These disturbances have led to well-documented …
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The ecology of algae in relation to river water equality surveillance
… for the routine biological surveillance of river water quality, using the non-planktonic algae. Studies on sampling methodology indicated that natural substrata should be sampled directly wherever possible, but for routine purposes, only a semi-quantitative approach was found to be feasible. …
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The effects of bog restoration in formerly afforested peatlands on water quality and aquatic carbon fluxes
… shows significant effects on pore- and stream- water quality, when practised separately. However, there is very little knowledge of the combination of both these practices in forest-to-bog restoration.<br/>This research investigated the effects of forest-to-bog restoration on pore-, surface-, …
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RESPONSES OF RECENT BENTHIC FORAMINIFERA TO METAL POLLUTION IN SOUTH WEST ENGLAND ESTUARIES: A STUDY OF IMPACT AND CHANGE
… Cornwall in January 1992 of metalled acidic mine water drainage from the recently closed Wheal Jane tin mine. Shortly after this discharge a post-impact study using the responses of Recent benthic foraminifera as indicators of metal pollution was carried out on this Creek which had not been …
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Urban drainage modeling and evolutionary multiobjective optimization for combined sewer overflows prediction and control
… rainfall events, the stress on urban wastewater systems increases. In particular, urban flooding and river water quality degradation due to combined sewer over flows (CSOs) are prevailing problems in urban areas worldwide. In this study we have developed an integrated hydrologic-hydraulic …
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An analysis of surface water from an informal settlement, Langrug, Franschhoek: down a slippery slope
Contaminated surface water from limited sanitation and drainage systems in informal settlements degrades receiving rivers. However, little is known about the water quality and flow of rivers draining informally settled catchments. This study explores the dynamics of a human water system in an …
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