Modeling stormwater using a grid of precipitation gauges for improved system management

Abstract

Urban precipitation can vary across short distances in the urban landscape. A grid of high resolution precipitation gauges is used to capture a more accurate picture of this variation. The major goal in this thesis was to investigate the influence of the spatial resolution of the rainfall input on the model (urban drainage system). The analysis was based on varying the distribution of the dense rain gauge network. The data set that used for analysis in this project are come for two source: 1)the Regnbyde 3M project has collected several seasons of data from a precipitation grid in Trondheim. 2)national grid from Norwegian Meteorological Institute. It has been proven that using a more than one raingauge have influence to simulated runoff. An average value is impact response is 13%. Using more than 2 gauge station were not significantly affected a impact of catchment response. To additional found that a discrepancy in runoff was very small, if raingauges outside the investigation area was also considered. The location gauge have impact on runoff simulation result