To model rainfall runoff relationship for the basin, HEC-HMS
was used. The basin model for HEC-HMS was prepared using
Geospatial Hydrologic Modeling Extension (HEC-Geo HMS),
which uses ArcView and the Spatial Analyst extension of it.
Using meteorological data, HEC-HMS model for the Kalu-
Ganga River is developed. The model parameters were
calibrated and verified on event basis using the rainfall runoff
data available. Runoff data required for the HEC-RAS was
computed using this calibrated and verified model.