Title: Modeling Urban Stormwater Disposal Systems for their Future Management and Design
Abstract: This thesis investigates aspects of urban stormwater modeling and uses a small urban catchment (NE38) located in the suburb of Nedlands in Perth, Western Australia to do so. The MUSIC (Model for Urban Stormwater Improvement Conceptualisation) model was used to calibrate catchment NE38 using measured stormwater flows and rainfall data from within the catchment. MUSIC is a conceptual model designed to model stormwater flows within urban environments and uses a rainfall-runoff model adapted to generate results at six minute time steps. Various catchment scenarios, including the use of porous asphalt as an alternative road surface, were applied to the calibrated model to identify effective working stormwater disposal systems that differ from the current system. Calibrating catchment NE38 using the MUSIC model was attempted and this involved matching modeled stormwater flows to stormwater flows measured at the catchment drainage point. This was achieved by measuring runoff contributing areas (roads) together with rainfall data measured from within the catchment and altering the seepage constant parameter for all roadside infiltration sumps. The seepage constant was 509 mm/h. Direct measurement of saturated hydraulic conductivity (Ksat) using the constant head permeameter method for roadside infiltration sumps within catchment NE38, enabled comparison of the mean value to the seepage constant. The mean measured value of 520 mm/h was very close to the seepage constant of 509 mm/h and generated stormflows only 1% below measured volumes. Consequently, it was possible to use an uncalibrated MUSIC model to predict flow and contaminant loads, provided the
Publication Year: 2006
Publication Date: 2006-01-01
Language: en
Type: article
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