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Showing 1 to 15 of 15 for “"retention pond"”.
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Performance Analysis of the Ashby Stormwater Retention Pond in Fairfax City, Virginia
Ashby Pond in the City of Fairfax, Virginia was retrofitted to treat runoff from 54.7 hectares of urban land of mixed use. The pond discharges into Accotink Creek, a highly urbanized tributary of the Potomac River and Chesapeake Bay that is listed on the State of Virginia 303(d) list for multiple …
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A Field and Modeling Assessment of Methyl Mercury Accumulation in an Engineered Retention Pond
<p>The accumulation of methyl mercury (MeHg) in lakes during summer stratification has been demonstrated to affect biotic mercury (Hg) accumulation. However, small, shallow polymictic lakes can experience short-term stratification and mixing events that are largely unstudied in their abilities to …
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Modifications to an Existing Glycol Retention Pond and Alternative Technologies Review for Aircraft Deicing Operations and Glycol Recovery and Treatment: Dane County Regional Airport
<p>The purpose of this study was to review new aircraft deicing technologies and developments and surmise which approach may be the most appropriate for the Dane County Regional Airport’s (KMSN) expansion plans, size, available funds, and environmental impact reduction efforts. This paper focuses …
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Assesment of Water and Sediment Quality in an Abandoned Mine Lands, Tuscaloosa County, Alabama
… except during winter months. In contrast, retention pond (SW8, SW9) and pond outlet (SW10) samples consistently displayed strongly acidic pH (3–3.5), while one stream site (SW7) exhibited lower conductivity (193–585 µS/cm) and higher pH (6.5-8.6) values throughout the sampling period, …
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A Bayesian stormwater quality model and its application to water quality monitoring
… research: a sand filter, a gravel wetland, and a retention pond. The contaminants under consideration include: total suspended solids (TSS), total petroleum hydrocarbons - diesel range hydrocarbons (TPH-D), dissolved inorganic nitrogen (DIN, comprised of nitrate, nitrite, and ammonia), and zinc …
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Understanding the role of scale in assessing sediment and nutrient loads from Coastal Plain watersheds delivered to the Chesapeake Bay
… 2) container nursey; and 3) a Coastal Plain retention pond. This study provides methods for estimating watershed pollutant loads. This is a key missing link in implementing watershed improvement strategies and selecting the most appropriate urban BMPs at the local scale. Results of these …
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Seepage Rates in Closed Basins
… water sites in this study were 1.1 cm/d for a retention pond surrounded with dense vegetation, 0.5-0.8 cm/d for a natural lake located close to a groundwater pumping site, and 0.4 cm/d for another natural lake with no groundwater pumping in the proximity. Two methods to estimate seepage rates …
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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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Testing the efficacy of mitigation measures for reducing fine sediment and associated pollutant delivery to and through rivers in agricultural catchments of England
… buffer, and a constructed wetland and in-stream pond treatment train. The improved farm infrastructure (resurfacing of a farm track, installation of a retention pond, improvements to a drainage ditch) effectively reduced inputs of sediment and associated contaminants to the river, however, this …
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Evaluation of stormwater control measures for the removal and fate of legacy and emerging contaminants
… separators, cartridge filters, and a retention pond—across military sites in the southwestern and northwestern United States. PAHs and PCBs were analyzed in both the dissolved phase and across different particle size fractions including clay, fine silt, coarse silt, and sand. PFAS were …
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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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Reduction of pollution levels in the Chatty River through Sustainable Drainage Systems: A case study of the Bethelsdorp River sub-catchment
… interventions included: a constructed wetland, a retention pond, and various infiltration practices. Six scenarios were explored, including various individual interventions, some regional controls and finally, the combination of all the interventions. Pollutant reduction from the different …
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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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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 …