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 21 for “"Retention ponds"”.
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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 …
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Utilization of Stormwater Retention Ponds by Aquatic Turtles in Montgomery County, Virginia
Stormwater ponds design to mitigate the negative impacts of runoff from impervious surfaces in urban areas have become common landscape features as they are required by state and local environmental regulations. While some have hypothesized that stormwater ponds may provide habitat for wildlife, …
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Green Technologies and Sensor Networks for BMP Evaluation in Stormwater Retention Ponds and Wetlands.
… Media (BAM) for nutrient reduction in three retention ponds located throughout the Central Florida region. Chapter 2 examines the use of a Sloped and Horizontal MBRs arranged in a baffling configuration, whereas Chapter 3 examines the field performance of a Floating MBR arranged in an upflow …
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Breeding Biology of Red-winged Blackbirds (Agelaius phoeniceus) in Stormwater Retention Ponds on the College at Brockport Campus
… (Agelaius phoeniceus) often breed in stormwater retention ponds. I studied the breeding biology of the species in seven small retention ponds at the College at Brockport, to evaluate their breeding success in a created habitat relative to data from studies in natural habitats. I also determined …
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Interactions of Various Bacterial Populations with Chemical and Physical Factors from Seasonal Inputs and Outputs of Retention Ponds
<p>Retention ponds at Governors State University play an important role in collecting and treating storm water runoff before leaving campus and entering Thorn Creek. Many chemical and physical factors influence the diversity of bacterial populations in freshwater ecosystems. The main objective of …
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Prevalence assessment of the amphibian chytrid fungus Batrachochytrium dendrobatidis across two habitat types in East Tennessee
… of Bd varies between natural wetlands and urban retention ponds in East Tennessee while also examining relevant habitat factors and morphometrics. A total of 373 frogs were sampled across six retention ponds and six wetlands distributed evenly between two basin level hydrologic unit codes. Of the …
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Limnological And Landscape Factors Affecting Use Of Manufactured Ponds By The Invasive Cuban Treefrog (Osteopilus Septentrionalis)
… and often breed in manufactured wetlands such as retention ponds and borrow pits. This study identified limnological, landscape, and biotic characteristics that discouraged pond use by Cuban Treefrogs and promoted use by native amphibian species. I sampled natural and manufactured ponds in Orange …
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An Assessment of Floating Treatment Wetlands for Reducing Nutrient Loads from Agricultural Runoff in Coastal Virginia
… that can enhance the performance of traditional retention ponds by increasing removal of the nutrients nitrogen (N) and phosphorous (P). FTWs consist of floating rafts on which wetland plants are planted, allowing the roots to be submerged below the water surface while the shoots remain above. A …
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A comparison of the pollutant removal efficiencies of retention and detention stormwater control basins
… of treatment of stormwater runoff obtainable in retention (maintains a water pool) and detention (drains completely) basins. Three basins were studied, two retention and one detention, and a total of 191 storm events were monitored using automatic sampling equipment. The samples were analyzed by …
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Performance Analysis of the Ashby Stormwater Retention Pond in Fairfax City, Virginia
… assign pollutant reduction credits to retention ponds that meet certain design requirements. However, to actually meet existing and future water quality goals set by TMDLs, it must be proven that such ponds truly provide the water quality benefits for which they have been credited. The …
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Permeability and swell testing of selected South African bentonites
… as an impervious liner in dams, landfill sites, retention ponds etc. where it is used in its pure form and as a composite material mixed with soil. Bentonite liners are rapidly gaining interest in many other countries including Southern Africa. Bentonite is found world wide, and in South Africa …
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Floating treatment wetlands for synthetic greywaterremediation
… treatment technology, mesocosm‒scale retention ponds were artificially retrofitted with floating reedbed Phragmites australis to introduce, what isknown as, floating treatment wetlands (FTWs) for improving the removal efficiency of soluble contaminations from synthetic greywater (SGW) …
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Developing a Stormwater Pond Filter to Capture Phosphorus and Other Pollutants
… Best Management Practices (BMPs) such as wet retention ponds prevent eutrophication by acting as a sink for nutrients, but can become a source of pollutants if not properly monitored and maintained. A proposed solution is a standalone, multi-stage filter system that can attach to BMPs with …
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The mobility of metals in acid mine drainage from abandoned coal mines
… origin, AMD outwelling points, downstream AMD retention ponds and a small wetland were selected for this study. Water, sediment, precipitate, and algae samples were collected from the Blesbokspruit. The water quality of the catchment was determined and compared to mineralogical and major and …
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Modeling Climate Change Impacts on the Effectiveness of Stormwater Control Measures in Urban Watersheds
… a very common stormwater control measure (SCM), retention ponds, was assessed. Rainwater Harvesting (RWH) systems are an unusual SCM in that they recycle and reuse stormwater, normally from rooftops, and increase water supply and reduce runoff. The efficiency of RWH systems for projected CC for …
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Managing the Water Quality of the Zandvlei Estuary using Sustainable Drainage Systems in the Diep Catchment
… Scenario 2 reintroduced four wetlands and two retention ponds into the main river network. The stormwater network currently only uses these wetlands and ponds as attenuation storage during large rainfall events. Scenario 3 proposed a large, constructed wetland at the confluent of the two major …
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Floating wetlands for urban stormwater treatment
… of FTWs in the U.S., particularly within wet ponds that receive urban runoff; and (3) plant temporal nutrient distribution, plant growth rate, and the long-term persistence of the FTWs in temperate regions with periodic ice encasement. An assessment model, i-FTW model, was developed, and its …
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ECOLOGICAL AND SOCIOLOGICAL IMPLICATIONS OF TISZA RIVER MINE TAILINGS POLLUTION AND EFFECT OF CHRONIC CADMIUM EXPOSURE ON FISH PHYSIOLOGY
… extraction. Mining waste is most often stored in retention ponds, which sometimes leak or fail. One of the worst mine tailings disasters on record occurred on the Tisza River of Central Europe in the winter of 2000, releasing over 240,000 tons of mine tailings laced with metals into the natural …
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The social dimension of stormwater management practices including sustainable urban drainage systems and river management options
… in particular to the application of SUDS, mainly ponds, and river management schemes.<br/><br/>The thesis arose from a project funded by the Environment Agency of England and Wales through SNIFFER under a programme titled “Social impacts o f stormwater management techniques including river …
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