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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 69 for “"Urban Runoff"”.
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Heavy metals partitioning in a stream receiving urban runoff
… along Bull Run which received sewage effluent, urban runoff, and stormwater drainage from the Manassas area. Sampling stations included an upstream control located well above the urban area, four stations located immediately above and below suspected stormwater inputs, and a station sufficiently …
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Advanced Methods for the Selection of Urban Runoff Design Storms
Urban runoff design storm selection has in the past been arbitrary at times. This has led to inadequate and unreliable capacity design of urban runoff structures. By utilizing a continuous urban runoff digital computer model, the frequency response of selected urban basins to a selected historical …
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A Comparative Microbial Composition Assessment of Stormwater, Urban Runoff and Wastewater
… assessment of fecal indicator bacteria (FIB) in urban runoff (n = 96), stormwater (n = 8), and wastewater (n = 16). We quantified the densities and reductions of E. coli and Enterococcus, in raw stormwater, treated urban off from the Santa Monica Urban Runoff Recycling Facility (SMURRF) and …
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Impacts of dust suppressant application in the quality of urban runoff in arid regions
… of dust suppressants on the quality of urban runoff and to evaluate changes in the chemical composition of soils to which suppressants were applied. Eleven individual plots were topically treated with petroleum-based products, ligninsulfonate, acrylic polymers, magnesium chloride, fiber …
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A study of the effect of the artificial recharge of urban runoff in Roanoke, Virginia
The rapid urbanization of the Williamson Road area of Roanoke during the late 1940's and early l950's brought about the plugging of the natural passageways for the escape of surface waters and the ponding of the urban runoff became a problem. In order to solve this, the city drilled several …
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The effectiveness of certain sustainable urban drainage systems in controlling flooding and pollution from urban runoff
… thesis addressed the performance of Sustainable Urban Drainage Systems (SUDS) at three sites in Scotland - a porous paved car park and two swales. It is the first research to provide results for such systems in the UK and also the first direct comparison between SUDS and traditional systems in …
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A study of a modified membrane filter technique for the enumeration of stressed fecal coliforms in urban runoff
Urban runoff samples collected from a parking lot in Blacksburg, Virginia were analyzed by several techniques for fecal coliform recovery. The samples were also analyzed for heavy metal concentrations. Statistical analyses of data by the paired-t test showed that the standard membrane filter …
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Methodology for assessing the potential impact of urban development on urban runoff and the relative efficiency of runoff control alternatives.
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Civil Engineering, 1973
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Nonpoint source pollution during dry and wet weather flows in an urbanized watershed
This research evaluates the quality of urban runoff, from various nonpoint sources during dry weather flows (DWF) and wet weather flows (WWF) in the Las Vegas Valley. Standard constituents in urban runoff were measured to assess the quality of urban runoff, to identify the possible sources of DWF …
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A comparison of the pollutant removal efficiencies of retention and detention stormwater control basins
… Monitoring Laboratory under the National Urban Runoff Program, to obtain an understanding of the degree 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, …
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Distributed surface-subsurface modelling approach for evaluating the impact of rain gardens on steep terrain
As the proportion of people living in urban low-lying areas increase dramatically over time, a large number of high and steep slopes have been modified in order to increase the available land cover. This expansion usually includes vegetation removal and construction of multiple engineered …
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Analysis of the Watershed Resources Registry using GIS to evaluate stormwater restoration practices in the Christina River Watershed
… acre per year were calculated by the Delaware Urban Runoff Management Model. Geographic information systems were used to map and interpret data.☐ This study concluded three key results. One, the Delaware Urban Runoff Management Model is a model that can be used in tandem with the Watershed …
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Hydrologic simulation of storm water detention storage in an urbanizing flood-plan
Emerging concepts of urban flood control consider the use of storage detention, especially where channel capacities are being overtaxed by urban runoff. Particular problems exist where high rainfall intensities and low topographic relief combine with rapid urban development to produce potential …
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Use of Automated Sampler to Characterize Urban Stormwater Runoff in Pecan Creek
… Stormwater Sampler SS201 to characterize the urban runoff in Pecan Creek. Location of the samplers was influenced by land use and ease of installation. Determination of the constituents for analysis was modeled after those used in the NPDES permit for seven cities within the Dallas/Ft.Worth …
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Distribution of petroleum products with respect to boating activity in a reservoir
… due to boating activity. PAH profiles showed urban runoff as another major contributor to the PAH concentration in the water and sediments. The urbanization of Hooes Run and the hydrology of the reservoir caused urban runoff to impact localized areas. Finally, atmospheric deposition was also a …
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Geochemical and limnological aspects of phosphorous contamination in the Noordhoek Valley, Cape Peninsula
… the two most important being the discharge of urban runoff and treated effluent from the local sewage works. During the period of the study (Jan-Oct 1998), the occurrence of toxic cyanobacteria of the species Microcystis aeruginosa was reported for the two main water bodies within the wetland. …
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An introduction to the study of phosphorus dynamics in Rondevlei
… which have negative impacts on waterbodies. Urban runoff and sediment fall under various sources of phosphorus. Sediments act as sources as well as phosphorus storage tanks. Processes of adsorption and desorption which occur -at the sediment water interface make phosphorus available for …
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Leveraging Technology to Add Value to a Phase II NPDES Permit
… Storm Sewer Systems (MS4) in the control of runoff from urban areas. The complex task of urban runoff mitigation has been investigated for several decades, resulting in a large variety of available computing and measurement tools for urban stormwater management. Unfortunately, these tools may …
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Storm Water System Monitoring for the Small Municipality Under Phase II of the National Pollutant Discharge Elimination System
… have evolved to recognize the impact of urban storm water on receiving streams. This increased emphasis has caused contaminants in storm water to be identified as a major concern. This developing concern has generated an increased interest in the water quality of our streams and lakes and …
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