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 24 for “"Design Storm"”.
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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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Storm Water Management Using a High Density Rainfall Network Along With Long Term Records
… research along with the current Jefferson Parish design storm rainfall were applied to a typical urban development to evaluate the extent of flooding.
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Modeling phosphorus transport in surface runoff from agricultural watersheds for nonpoint source pollution assessment
… Also developed is a technique for selecting a design storm for ANSWERS. The technique creates an n-year recurrence interval storm with a duration equal to the time of concentration of the watershed. The intensity pattern is simulated on a ten-minute interval using a first-order Markov model …
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A systems approach to evaluate water quality oriented land management plans
… approach consisted of using the Finite Element Storm Hydrograph Model (FESHM) to simulate runoff and sediment yield from a series of design storms with known return periods. The design storm simulations were the basis for sediment distributions representing unique cropland areas and management …
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Modeling event-based coupled hydrologic and mass transport in small urban watersheds
… was proposed and successfully illustrated. A design and analysis methodology for rainfall-runoff quantity and quality basins was proposed and the feasibility was demonstrated through design charts for a Baton Rouge, LA watershed, a 1-year, 1-hour design storm loading and a measured PSD from 1 …
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An assessment of models and methodologies used in the design of detention facilities for small urban watersheds
… control nonpoint source pollution by capturing stormwater runoff and detaining the water, which provides time for suspended pollutants to settle out. In the process, flood peaks are typically attenuated, thus reducing the risk of flooding downstream. Detention ponds typically are implemented as …
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Re-Think the Streets: An Evaluation of Green Street Practices as a Method to Achieve Combined Sewer Separation
… States have been grappling with how to mitigate stormwater for decades. The ongoing trend of land development coupled with the heightened frequency and intensity of storm events has necessitated costly infrastructure improvements that are short-sighted and fail to address the underlying cause of …
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Applications of GIS in hydrologic modeling
… systems (GIS) to hydrologic modeling, stormflow generation in steep watersheds of humid regions, and automated configurations of watersheds was reviewed. A hydrologic model in conjunction with GIS technology was constructed to simulate stormflow hydrographs from a watershed. The model …
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Effective Green and Ampt parameters for two layered soils
… both under steady and unsteady rain. For a given design storm, the maximum saturated depth of the top layer can be estimated. Because the uppermost layer controls the behavior until the wetting front reaches the boundary of the layers, if the thickness of the top layer is greater than maximum …
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Hydrologic Modeling of a Probable Maximum Precipitation Event Using HEC-HMS and GIS Models - A Case Study of Two Watersheds in Southern Virginia-
… response from the Probable Maximum Storm (PMS), the theoretical worst-case meteorological event that is capable of occurring over a particular region. The primary goal of these simulations was to obtain discharge hydrographs associated with the Probable Maximum Flood (PMF) at key …
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The Use of Stormwater Modeling for Design and Performance Evaluation of Best Management Practices at the Watershed Scale
… best management practices or BMPs to treat urban stormwater runoff has been pervasive for many years. Extensive research has been conducted to evaluate the performance of individual BMPs at specific locations; however, little research has been published that seeks to evaluate the impacts of small, …
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Rainfall-runoff control: variably saturated transport for an infiltration system controlling water quality and quantity
… for water quality and quantity control. The design, water quality and quantity functions of a partial exfiltration reactor (PER) utilizing Fe-coated-sand and porous pavement (CPP) is examined specifically across three representative rainfall-runoff events. Total concentrations and mass for …
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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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How a dual drainage approach changes the examination of flood management infrastructure: a case study of the Chatham neighborhood of Chicago, IL
… & hydraulic simulation models such as the Storm Water Management Model (SWMM) can provide effective predictions about urban flooding, the development of dual drainage models (DDM) offers a unique opportunity to improve upon traditional methods. This study investigated the comparison between …
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The effects of future extreme precipitation events on stream hydrology and hydraulics of stream crossing structures
… is part of realistic training and extreme storm events and associated flooding risks can temporarily limit access to training lands and other training features such as water crossings. If an increase in intensity and incidence of extreme precipitation events is realized, installations …
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Impacts of Stormwater Management Practices and Climate Change on Flow Regime and Channel Stability
Urbanization increases runoff during storm events due to a reduction in vegetation and an increase in impervious surfaces, which limits the land's capacity to absorb and slow down water. This increase in runoff contributes to channel erosion. While extensive research exists on the hydrologic …
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A framework for designing and optimizing green infrastructure network under uncertainty
… (GI) is becoming a common solution to mitigate stormwater-related problems. Despite wide acknowledgement of GI benefits, there is a lack of decision support tools that allow practitioners to interactively identify and evaluate the performance of small GI practices using hydrologic models under …
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The Effect Of Tidal Inlets On Open Coast Storm Surge Hydrographs: A Case Study Of Hurricane Ivan (2004)
Florida's Department of Transportation requires design storm tide hydrographs for coastal waters surrounding tidal inlets along the coast of Florida. These hydrographs are used as open ocean boundary conditions for local bridge scour models. At present, very little information is available on the …
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Erosion behavior and scour risk of extremely coarse streambeds
… computed and compared with the desired scour design storm, e.g., Q_{100}. If the design scour velocity exceeds the limit velocity, then the bridge is considered to have a higher scour risk. The limit analysis curve is also used to extend the useful range of the standard scour design equations, …
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Distributed surface-subsurface modelling approach for evaluating the impact of rain gardens on steep terrain
… to the near-surface bedrock layer. Therefore, stormwater BMPs-LID can be considered as one of the effective approaches to reduce urban runoff quantity and quality from steep terrain areas. Stormwater BMPs provide sustainable, cost effective, and ecologically-friendly approach to maintain …
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