Abstract
An urban runoff simulation system that utilizes a GIS sewer data base has been developed and applied to a catchment in Kobe. The runoff analysis is based on the Storm Water Management Model (SWMM). The system provides an interface that allows actual sewer network data to be read from the data base and then to be transferred into the link-node format required by SWMM. In addition, the system facilitates the formulation, via computer mapping software, of SWMM-formatted data for drainage catchments which are not included in the data base. The system was applied to a drainage catchment in Kobe and acceptable results were obtained.
