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 77 for “"Urban stormwater"”.
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Floating wetlands for urban stormwater treatment
… 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 parameter s fitted …
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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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Modelling of urban stormwater drainage systems using ILSAX
… last few decades, the world has witnessed rapid urbanisation. One of the many complex problems resulting from increased urbanisation is related to management of stormwater from developed areas. If stormwater is not managed properly, it may lead to flooding of urban areas, and deterioration of …
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Bioretention Hydrologic Performance in an Urban Stormwater Network
… aims to assess bioretention's effects on an urbanized watershed using two modeled scenarios: one where runoff from many land uses was routed through the practice, and another in which only runoff from large impervious areas was routed. Peak flows, volumes, and lag times from these models were …
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A statistical approach to urban stormwater detention planning
… developed to study the long-term behaviour of a stormwater detention unit. This unit stores a portion of the incoming runoff, corresponding to the empty space available in the unit, from which runoff is pumped to a treatment plant. The objective is to avoid, as much as possible, the discharge of …
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Vegetated Swales in Urban Stormwater Modeling and Management
… under constrained, and/or over discretized stormwater management practice.
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Fate and Treatability of Engineered Nanoparticles in Urban Stormwater
… and nano-titanium dioxide in source specific stormwater is explored, and the influence of n-Ag on the treatability of co-pollutants is examined. Through the analysis of particle size distribution, it was noticed that metallic ENPs tend to aggregate initially, while extended turbulence in the …
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Estimating Post-Construction Costs of a Changing Urban Stormwater Program
… nation's waters continues to be a problem and urban runoff is a large contributor to it. New stormwater management policies stress the importance of using stormwater control practices that reduce the quantity and improve the quality of stormwater runoff. The new approaches tend to emphasize …
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Performance Analysis of an Urban Stormwater Best Management Practice Retrofit
… the primary objective of traditional stormwater best management practices (BMPs) was to attenuate peak runoff discharges from urban areas. There has been growing demand to construct BMPs that improve stormwater runoff quality to reduce pollutant loading into downstream water bodies. A …
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Removal of hydrocarbons from urban stormwater runoff by gravity separation
… at 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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Sustainable cities and institutional change : the transformation of urban stormwater management
… Problematically, we know far less about why urban institutions change, when they do, in the support of sustainability objectives. Why have some cities progressed in translating ideas about environmental sustainability into enduring institutional reforms while other similarly situated cities …
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Regulatory and Economic Consequences of Empirical Uncertainty for Urban Stormwater Management
… for mitigation of the ecological effects of urban stormwater runoff has been delegated to local government authorities through the Clean Water Act's National Pollutant Discharge Elimination Systems' Stormwater (NPDES SW), and Total Maximum Daily Load (TMDL) programs. These programs require …
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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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The performance of an underground storage structure for urban stormwater quality management
… pollutant removal performance of an underground stormwater detention facility. The facility was located beneath the parking lot of a retail shopping mall in Prince William County, Virginia. The study methodology incorporated automatic inflow and outflow monitoring stations containing flow …
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Simulation and design of diversion and detention system for urban stormwater management
… way to control nonpoint source pollutant in urban areas. This can be achieved by a diversion box and detention basin system. To numerically simulate the response of the system to a design rainfall event and the associated pollutant loadings for a given drainage area, a desk top model has been …
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Performance Evaluation of a Low Impact Development Retrofit for Urban Stormwater Treatment
The goal of Low Impact Development (LID) is to mimic the pre-development hydrologic regime of a catchment through infiltration, filtration, storage, evaporation, and detention of post-development runoff using small-scale hydrologic controls close to the source. A LID facility located in Northern …
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Analysis of an Urban Stormwater Bioretention Management Practice in Prince William County, Virginia
The performance of an urban stormwater bioretention management practice in the Kingsbrooke Subdivision of Prince William County, Virginia was examined over a one-year period. Bioretention is a relatively new urban stormwater best management practice (BMP) intended to mimic the pollutant-removal …
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