Investigation of Impacts of Spatial Variability and Motion of Rainfall in Urban Drainage Modelling

The topic of this paper is to investigate which knowledge can be acquired from weather radar systems on the case of spatial variability of storm events. Furthermore, it is investigated how this variation affects the results of an urban drainage model. The main focus of the study is to determine if the motion of a storm event has any impact on the runoff response in the drainage system. To do this a novel method is developed to rotate and relocate existing radar images and use the result as input to a selected model. At the moment the results show that the dominant direction of the storm has little to none effect on the outcome, but further research is being conducted to confirm this.