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 15 of 15 for “"rain garden"”.
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Evaluation of flow models and pollutant retention isotherms for their application to rain garden bioretention
… which could predict pollution retention in a rain garden and secondly to use the model and additional experiments to examine various aspects of rain garden design with respect to pollutant retention. Initially, the behaviour of all contaminants in urban runoff was examined including their …
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Distributed surface-subsurface modelling approach for evaluating the impact of rain gardens on steep terrain
… urban runoff quantity and quality from steep terrain areas. Stormwater BMPs provide sustainable, cost effective, and ecologically-friendly approach to maintain natural pre-development hydrological functions and prevent the delivery of contaminants to the receiving waters. Structural BMPs, in …
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A distributed modeling approach for evaluating hydrological effects of rain gardens in urban watersheds
… effects in urban watersheds under a continuous rainfall period. It is expected that rain gardens will have a significant effect in the reduction of peak discharge and volume for a range of different storms magnitudes including less frequent events. Rain gardens are small depressions covered by …
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Denitrification in a best management practice bioretention system
… were collected from six depths within the rain garden, four of which were within the saturated anoxic zone. These samples were analyzed using endpoint PCR, targeting total bacterial 16S rRNA or a denitrification gene (nosZ) in order to determine presence or absence of denitrifying bacteria. …
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Nitrogen chemistry in an urban bioretention system in Singapore
… of nitrate was lower in the outflow from the rain garden than in its inflow, but no research had been done on other nitrogen species or transformation pathways. Preliminary analyses suggest that, although the saturated layer is sufficiently anoxic and denitrification is occurring as per …
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Watershed-level Analysis of Urban Raingarden Performance
… City of Kansas City began the project of "10,000 Raingarndens in Metropolitan Area" in 2008. For the project, there are a test area and a control area. Both have similar drainage areas and similar precipitation. In the test area, there are 135 rain gardens completed in June 2012. There are four …
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A comprehensive modeling approach for urban rainfall - runoff simulation
… worldwide, including surface flow, underground drainage flow and especially the inevitable flow connecting with underground infrastructures in highly urbanized areas. A comprehensive modeling approach and effective mitigation measures are necessary for urban risk assessment and management. Herein …
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Modeling and analysis of phosphorus reduction by rain gardens and other BMPs in stormwater runoff from small urban developments
… the improvement in phosphorus concentrations if rain gardens are implemented on a fraction of residential areas in the Nashoba Brook watershed. The effectiveness of a rain garden at improving the phosphorus concentrations in runoff was evaluated by modeling the device in P8. Both the TDM site …
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The role of reliability in characterizing green stormwater infrastructure in urban areas
… of temporal and spatial variability on modular rain garden performance offers insights into challenges commonly faced by green infrastructure: clogging and maintenance, back-to-back rainfall, and variable urban soils. Building on these findings, the second contribution is the use of fragility …
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Low-impact development in the Assabet River Watershed : site hydrologic design and watershed-scal implications
… The design implements LID technologies, such as rain garden storage areas, pervious pavement, and curb cuts. Pre-developed, existing, and LID-designed scenarios are analyzed. A computer program called the Site Low-Impact Development Design (SLIDD) Model is developed to account for the distributed …
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Investigating the Water Budget and Subsurface Hydrology of Two Rain Gardens in Calgary, Alberta
… stormwater from infiltrating into the soil. Rain gardens are a form of low impact development technology that mitigate some of these effects by promoting natural stormwater infiltration. Rain gardens have extensively been researched in warm and humid climates; however, less is known about …
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Water quality and hydrological assessment and modeling of bioretention basins in tropical cities
… 15 water quality parameters in the Balam Estate Rain Garden in Singapore. We then use a combination of field observations and model simulations to recommend practical engineering strategies to design and manage bioretention basins in the tropics. First, field observations on water quality …
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Stormwater Treatment by Two Retrofit Infiltration Practices
Increases in impervious surfaces associated with urbanization change stream hydrology by increasing peak flow rates, storm-flow volumes and flood frequency, and degrade water quality through increases in sediment, nutrient, and bacteria concentrations. In response to water quality and quantity …
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Development of a Design-Based Computational Model of Bioretention Systems
… watersheds is bioretention (also known as a rain garden). Despite its wide applicability, an understanding of its multiple physiochemical and biological treatment processes remains an active research area. To provide a wide ability to evaluate the hydrologic input to bioretention systems, …