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This paper presents a remote sensing and Geographic Information Systems (GIS) based approach for using US EPA's Storm Water Management Model (SWMM) in urban environment. Cartosat-1 PAN + IRS-P6 LISS-IV merged product was used to map land cover in part of Surat city at 1:10,000 scale. Cartosat-1 stereo pair was used for deriving Digital Elevation Model (DEM) of the study area. Geo-informatics based methods were developed for delineation of sub-catchment areas, assignment of subcatchment outlets, and estimation of characteristic width. It was observed that 59% of the developed area in the study region was directly or indirectly connected to the storm water drainage network. Furthermore, dynamic rainfall-runoff simulation on 3 day rainfall indicated that the average runoff coefficient on the urbanised sub-catchment areas which were directly connected to the drainage network was 0.92 as against 0.88 on those urbanised sub-catchments without having direct access to storm water drainage.

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