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 494 for “"Ponds"”.
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The viability of transforming stormwater detention ponds into infiltration ponds on the Cape Flats, South Africa
… implementing MAR in retrofitted detention ponds overlying the unconfined Cape Flats Aquifer (CFA). This study investigated the viability of retrofitting detention ponds in Cape Town to facilitate urban MAR at the neighbourhood scale. The research methods used included desktop analysis, …
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Amphibian Community Similarity Between Natural Ponds And Constructed Ponds Of Multiple Types In Daniel Boone National Forest, Kentucky
… habitat and unregulated mitigation practices. Ponds built for mitigation purposes often do not replicate the lost ponds in structure or ecological processes. A lack of general monitoring has produced a void in knowledge of what long-term role constructed ponds play in shaping amphibian …
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Modelling the evolution of Arctic melt ponds
… sea ice melts at its surface creating melt ponds. An accurate estimate of the fraction of the upper sea ice surface covered in melt ponds during the summer melt season is essential for a realistic estimate of the albedo for global climate models. I will present a melt-pond{sea-ice model that …
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THE CARBON DYNAMICS OF CONTRASTING FRESHWATER PONDS
… little research investigates carbondynamics in ponds smaller than 0.01-hectare, despite these being most numerous. This research aimed to determine whether small ponds in the UK are carbon sinks, or atmospheric carbon sources. An intensively farmed-catchment pond, a nearby unpolluted …
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Metal cycling in macrophyte dominated wastewater ponds
Thesis (M.S.)--Michigan State University. Dept. of Fisheries and Wildlife, 1973
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Optimization of wastewater stabilization ponds in Honduras
… studied flow behavior in waste stabilization ponds focusing on benefits to effluent quality attainable through operational modifications. This thesis presents a summary of this investigation including a Honduran national and water sector background, and trends based upon site visits and …
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Ecology of benthic macroinvertebrates in experimental ponds
… metrics in a series of 6 replicate experimental ponds from March 1989 to April 1990. I determined voltinism, emergence patterns, larval growth rates and annual production for Caenis amica (Ephemeroptera: Caenidae), Callibaetis floridanus (Ephemeroptera: Baetidae), Anax junius (Odonata: …
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Assessment of road pollutants in roadside retention ponds.
… urban drainage systems (SuDS) such as retention ponds manage runoff and are a key pathway for pollutants from roads to the wider aquatic environment. Hence the aim of this work was to assess retention ponds as a pathway for TRWPs, MPs, and additive chemicals entering the aquatic environment. A …
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Sedimentation ponds and their operation in stormwater systems
The efficacy of sedimentation ponds as a means of sediment and heavy metal remediation is investigated, with particular regard to the physical and chemical conditions that may lead to remobilisation of metals from the sediments
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The performance of SUDS ponds in Eastern Scotland
… furthers knowledge on the performance of SUDS ponds in Scotland and provides an enhanced method for analysing and reporting SUDS water quality performance. The research is based on information gained from intensive flows and water quality studies at two SUDS ponds, and additional water quality …
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Design and dynamic modeling of waste stabilization ponds
Waste stabilization ponds are reviewed as a means to treat wastewater. Processes involved in the three main types of waste stabilization ponds are also reviewed. Empirically derived design guidelines are used to propose a design for a series of lagoons to follow a chemically enhanced primary …
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Waste stabilization ponds: Possible contamination of the shore
A waste stabilization pond was investigated to determine if there was a health hazard due to contamination of the shore line. Soil samples were taken at various points along the bank and water samples were collected from the pond. Coliform and enterococci counts were made from the samples and were …
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Macroinvertebrate colonization and production in new experimental ponds
… colonization of twelve 0.04-ha experimental ponds was studied for the 1st yr of their existence. The ponds were filled in late January 1988, and artificial substrate samples were retrieved at 4-wk intervals from February 25, 1988 to February 25, 1989. The first organisms (<u>Chironomus</u> …
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Evaluation Of Toxic Cyanobacteria In Central Florida Stormwater Ponds
… studies have been performed regarding stormwater ponds. Since stormwater ponds in residential neighborhoods are a common source for irrigation, research in this area is warranted due to the potential health effects associated with Cyanobacteria. This research was conducted to determine if …
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Evaluation of Fish Stocking in Southeastern South Dakota Ponds
A mail survey was sent to owners of 220 ponds which had received hatchery fish. Based on 187 pond owner responses, at most 45 (24%) of the ponds still contained the fishes stocked. Pond dryness and/or winterkill attributed to the failure of 121 (65%) of the ponds. A subsequent field survey of 30 …
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The Ecology of Parafluvial Ponds on a Salmon River
Parafluvial ponds are discrete lentic habitats embedded in the alluvia of gravel bed rivers that are formed by flooding and persist in relation to floodplain geohydrology. On the expansive flood plains of the Kwethluk River, I observed thousands of juvenile salmon apparently trapped by surface …
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The Ecology of Parafluvial Ponds on a Salmon River
Parafluvial ponds are discrete lentic habitats embedded in the alluvia of gravel bed rivers that are formed by flooding and persist in relation to floodplain geohydrology. On the expansive flood plains of the Kwethluk River, I observed thousands of juvenile salmon apparently trapped by surface …
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Benthic invertebrate management in plastic-lined fish culture ponds
<p>The use of plastic-lined ponds in place of earthen ponds for fish culture is becoming common among agencies; however limited information is available on their management. Since plastic lining significantly reduces the amount of organic sediment typically found on the bottom of culture ponds …
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Ecological assessment of salt ponds on St. John, USVI
Salt ponds serve several valuable ecological functions in the United States Virgin Islands (USVI), although they have traditionally been undervalued and poorly understood. This thesis describes an ecological assessment performed to provide baseline information on salt ponds on St. John, U.S. Virgin …
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Hydraulics of paddle wheels in high-rate algae ponds
Thesis: M.S., Massachusetts Institute of Technology, Department of Civil Engineering, 1981
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