HYDROLOGICAL MODELING USING REMOTE SENSING AND GIS; A CASE STUDY OF BATA RIVER BASIN

Abstract

A Hydrological model was developed for the Bata River basin, which is one ofthe tributaries of the Yamuna River, Infiltration and losses, unit hydrograph andriver routing are the main model components. ILWIS and Auto CAD softwarewere used to hydrological modeling. Satellite Remote Sensing and GIS techniqueswere used to estimate the relevant spatial parameters, which are used as input tothe hydrological model. SOl topomap, data collected from the field work, IRSLISS-lll temporal satellite data for rabi and khari f seasons and IRS PAN data areused as input for the model. SCS curve number method is used for the infiltrationlosses and synthesis of unit hydrographs. Complete watershed is divided to 10subareas. Ten hydrographs were developed as one for each subareas.Characteristics of the watershed were evaluated by modeling the watershed as awhole as well as subarea basis by routing the unit hydrographs along the riverreach. Muskingum hydrologica routing method is used for river routing. Theconstructed model is capable of forecasting the runoff for the particular event ofrainfall and derives hydrographs for required time duration.