A PROPOSAL OF STORM RUNOFF MODEL CONSIDERING RAIN DRAINAGE OF A HOUSE AND ITS APPLICATION FOR A SMALL URBAN CATCHMENT

Abstract

A storm runoff model considering rain water collection system of a house is developed for urban runoff analysis. The set-up of the model is based on so-called urban landscape GIS delineation that faithfully describes the complicated urban land use features in detail. The flow between single spatial elements is based on established hydraulic and hydrological models with equations that describes all aspects of storm runoff generation in an urban environment. The model was set up and evaluated for the Palmviken catchment in city of Arvika, Sweden. The runoff response to a high-intensity storm event in 2006 which caused 30-40 buildings flooding was simulated. It was demonstrated how the model can be used to evaluate the basement flooding in the urban hydrological system.