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 22 for “"impervious area"”.
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Modelling of urban stormwater drainage systems using ILSAX
… to management of stormwater from developed areas. If stormwater is not managed properly, it may lead to flooding of urban areas, and deterioration of water quality in rivers and receiving waters. Urban drainage systems are used to manage urban stormwater. For design of effective and economic …
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Hydraulic Design of Interlocking Concrete Permeable Pavement
… runoff due to the increase in urbanization and impervious area in the hydrologic system. Stormwater management takes many different forms, including Best Management Practices (BMP). BMPs include both non-structural and structural practices (McCall III, 2014). The focus of this thesis is on the …
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A Method for the Determination of Design Discharges for Urban Stream Restoration Projects in Northern Virginia
… the Maryland piedmont, adjusted for watershed impervious area, provide a means to determine design discharges for urban stream restoration projects in Northern Virginia.
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A sensitivity study on modeling hydrologic effects due to urbanization
… parameters were found. Varying the amount of impervious area (FIMP) produced significant changes in all land phase parameters except the seasonal infiltration adjustment constant (SIAC). There were significant year-to-year variations in all the land phase parameter estimates except the basic …
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The Impact of Different Stormwater Fee Types: A Case Study of Two Municipalities in Virginia
… a flat fee for each parcel, charging by parcel area, charging based on a runoff factor, and many others. As a case study, eight SUFs were applied to the City of Roanoke and the Town of Blacksburg, both in Virginia, to determine the effect each SUF has on how land use type impacts the revenue …
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An Analysis of Trends in U.S. Stormater Utility and Fee Systems
… Unit (ERU), a SUF that charges based on impervious area, was the most prevalent fee type in all NOAA Climate regions of the U.S. except the West and West North Central. The Tier system, a SUF that charges differently for properties by defined categories, was the second most prevalent in …
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Assessment of Mansionization and Residential Infill Development on Stormwater Runoff
… development and 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 …
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NATURE-BASED SOLUTIONS FOR FLOOD RISK MITIGATION: MAPPING AND HYDROLOGICAL MODELING IN AN UNDER-RESOURCED URBAN AREA ON THE MISSISSIPPI GULF COAST
… of vulnerable communities. I also found that impervious area coverage, followed by precipitation, is heavily influential on flooding hazard in this area. I then investigated several NBS within a vulnerable parcel of concern to stakeholders, testing the efficacy of permeable pavement, …
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Reliability analysis of green roofs under different storm scenarios
… due to changes in runoff caused by increasing impervious area. Green infrastructure offers an alternative method of runoff reduction, by using natural processes to infiltrate, store, and treat runoff at its source. In particular, green roofs can promise multiple benefits in terms of runoff …
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Assessing the suitability for urban stream rehabilitation in Fort Collins based on watershed, hydrologic, and benthic macroinvertebrate indicators
Development in urban areas generally increases the proportion of a watershed that is covered by impervious surfaces. This added impervious area causes both the quantity and peak rate of stormwater runoff to increase thereby altering the natural flow regime in receiving streams and causing changes …
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A quantitative analysis of the impact of land use changes on floods in the Manafwa River Basin
… and housing the percentage of less pervious and impervious area increases. Floods in the Manafwa watershed are often deadly and always an economic burden. In eastern Uganda there is little that can be done about climate change but land use changes can be managed. This study analyzed the impact of …
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A solution of the two parameter gamma model to relate unit hydrograph features to basin characteristics
… utilized in the investigation were: basin area, length of the longest streamcourse in the basin, average stream slope between points 10 percent and 85 percent downstream of the headwaters, and the percent of the impervious area contained in the basin. This last factor served as a measure of …
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Up an Urban Creek: The Role of Development Patterns in Stream Health
Population growth in urban and sub-urban areas imposes increasing pressure on stream ecosystems. The "Urban Stream Syndrome" explains the observed negative trends in stream conditions associated with increasingly urbanized watersheds. Urban planners are challenged with addressing increased growth …
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Designing green stormwater infrastructure for hydrologic and human benefits: an image based machine learning approach
… The loss of tree canopy and expansion of impervious area and storm sewer systems have significantly decreased infiltration and evapotranspiration, increased stream-flow velocities, and increased flood risk. These problems have brought increasing attention to catchment-wide implementation …
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Development of a Hydrologic Model for an Urban Headwater Stream: The Influence of Pervious Surface Properties on Runoff Dynamics
… urbanization (over 90% developed, and almost 50% impervious surface area (ISA)). Selected datasets provided information on the stormwater drainage network, the physical attributes of the catchment and receiving waterway (i.e. drainage area, slope, etc.), infiltration potential of soil map units, …
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The Impact of Rochester Storm Sewers on the Water Quality of the Lower Genesee River: A Modeling Approach Using PCSWMM
… storm sewers, and urban runoff. In urban areas, nonpoint source pollution from stormwater runoff is known to be a dominant factor in water quality. An assessment of the lower Genesee River was initiated to determine impacts from the canal, storm sewers, combined sewer overflows, and a …
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Exploring the response of urban storm sewer system to the implementation of green roofs
… in green roof response and abrupt changes in areal characteristics for better understanding of urban catchments. This allows the method to correctly scale various types of green roofs, and ultimately other BMPs, for a range of storm characteristics and BMP implementation. This study used the …
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Parameter estimation of urban drainage models
… change in hydrological characteristics in urban areas. Conversion of pervious areas into impervious areas increases the stormwater runoff quantity dramatically. One way of minimising urban flooding is to convey stormwater to receiving waters through stormwater drainage systems, which has been …
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Event-based hydrologic model calibration using NEXRAD in a data-poor region of southern New Jersey
… New Jersey, which contains the two growing urban areas of Vineland and Glassboro, to meet three objectives: (1) to validate that NEXRAD data can be effectively utilized in this region, (2) to better understand the roles that spatial variability and scaling play in the use of NEXRAD data within a …
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Effects of Using Clay Nanoparticles as a Soil Amendment to Remove Nitrate from Stormwater
<p>Development of urban areas continues to increase, disrupting the natural ecosystem and the pathways for water to drain into downstream water bodies. As the amount of impervious area increases, pollutants can accumulate on the surface and enter the water cycle by stormwater. In most cities, the …
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