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 137 for “"Stormwater runoff"”.
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Treatment of urban stormwater runoff by sedimentation
… that could be achieved by sedimentation of stormwater runoff. Seven runoff samples were collected from shopping centers, which were selected because of their large impermeable surfaces resulting in high pollutant concentrations. The sampling sites were also representative of locations where …
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Buildup/Washoff Model for Dissolved Iron in Stormwater Runoff
… New Orleans, Louisiana. Storm water runoff from the examined elevated roadway section was analyzed for 14 storm events. The model used a linear function of antecedent dry time for the buildup model. The rating curve assumption was selected to estimate the pollutant transport capacity. …
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Assessment of Mansionization and Residential Infill Development on Stormwater Runoff
… the associated increases in impervious cover and stormwater runoff have the potential to overwhelm aging infrastructure causing erosion, flooding, and ecological degradation of waterways. The lack of greenfield sites available for new development around urban centers coupled with a desire for …
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Removal of hydrocarbons from urban stormwater runoff by gravity separation
… Manassas Mall in Manassas, Virginia. The urban runoff samples obtained were placed into lab-scale Plexiglas~ settling columns to monitor removal of total hydrocarbons (THC) by extended quiescent settling. Samples were collected from the columns at specific depths and times over the 48-hour …
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Urban stormwater runoff contamination associated with gutter and pipe material degradation
In addition to typical stormwater pollutant sources (erosion materials, automotive activity, landscaping chemicals, pet wastes, etc.), urban stormwater runoff can also be contaminated with substances that leach from materials with which the water contacts as the rain water travels through an urban …
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Nutrient Dynamics in Stormwater Runoff from Green Roofs with Varying Substrate
… urban development is the increasing amount of stormwater runoff from large expanses of impervious surfaces. These impervious surfaces reduce the ability of stormwater to infiltrate into the soil and eventually groundwater, which leads to greater amounts of surface runoff. Green technology …
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Use of Automated Sampler to Characterize Urban Stormwater Runoff in Pecan Creek
… of this study was to use the Global Water 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 …
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Revealing natural processes to the contemporary observer : Wal-Mart & stormwater runoff management
… of natural resources complex. Issues of stormwater management and quality are explored through a water management system in a proposed commercial/retail development for the Wal-Mart corporation. A Wisconsin Department of Natural Resources administration office, water quality management …
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A spatially responsive catchment model for predicting stormwater runoff from ungaged watersheds
… descriptors into a model structure to determine stormwater runoff from small watersheds. The model consisted of two major components: a rainfall excess generator and a flood routing algorithm. The Holtan infiltration equation was used as the basis of a soil moisture routine to estimate rainfall …
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Factors influencing the behavior of hydrocarbons in stormwater runoff during quiescent settling
… influencing the sedimentation of hydrocarbons in stormwater runoff during quiescent settling. Bulk runoff water samples were generated by simulation of a typical rainstorm. An area of pavement at a gasoline filling station was washed down with tapwater and the resultant runoff was collected and …
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Stormwater Runoff from Elevated Highways: Prediction of COD from Field Measurements and TSS
… demand (COD) concentrations in storm water runoff from elevated roadways, which transports a significant load of contaminants. The objective of this research was to develop a mathematical model to relate COD concentration to different measurable parameters which are easily available and …
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A methodology for the design of wet detention basins for treatment of highway stormwater runoff
… detention basins for the treatment of highway stormwater runoff. Thirteen runoff samples were collected, over two years, from high volume (greater than 100,000 vehicles per day) highways in the Northern Virginia area. The sampling sites drained only highways and associated rights-of-way. …
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Functional Characterization of Green Sorption Media and Scaling of Pilot Studies for Copper Removal in Stormwater Runoff
… and recycled materials can be applied as a stormwater best management practice for copper removal. A green adsorption media mixture composed of recycled tire chunk, expanded clay aggregate, and coconut coir was physicochemically evaluated for its potential use in an upflow media filter. The …
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The ideal stormwater runoff calculator and how to apply it to site scale planning of federal facilities
… degradation of our nation’s waters. Net zero stormwater runoff regulation, per the Energy Independence and Security Act Section 438, is one way that federal facilities are required to mitigate adverse effects of urbanization. This study provides a qualitative and quantitative comparison of …
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Strengths and limitations of bioretention sorbent amendments to simultaneously remove metals, PAHs, and nutrients from urban stormwater runoff
Bioretention is increasingly being employed as a stormwater management tool in urban areas, with the intent of using infiltration to address both water quantity and quality concerns. However, bioretention soil media (BSM) has limited removal capacity for dissolved contaminants; hence, amendments …
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EFFECT OF MAJOR FACTORS ON BIOSWALE PERFORMANCE AND HYDROLOGIC PROCESSES FOR THE CONTROL OF STORMWATER RUNOFF FROM HIGHWAYS
Highways and roadways are the major source of stormwater runoff due to their prevalence and large non-permeable surface area. Best Management Practices (BMPs) such as bioswale provide effective on-site management and control of stormwater runoff from linear infrastructure such as highways. Many …
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Creating A Stormwater Runoff Model For The City Of Oxford, Mississippi: When It Rains, Where Does That Water Go?
… water management is needed in the city. This stormwater runoff model uses data collected from rain gauges, soil data from ssurgo and published soil infiltration rates from a Lafayette County soil survey, impervious cover created from Lidar and Aerial Photography, published evapotranspiration …
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Modeling and analysis of phosphorus reduction by rain gardens and other BMPs in stormwater runoff from small urban developments
… technologies at improving the quality of stormwater runoff from TDMs parking lot was evaluated. Several Best Management Practices (BMPs) and LID technologies were assessed to determine which devices would be most suitable for the site. The P8 Urban Catchment Model was chosen to model …
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