Department of Soil and Water Conservation Engineering, G. B. Pant University of Agriculture and Technology, Pantnagar-263 145, (Uttaranchal).
A geomorphologic instantaneous unit hydrograph (GIUH) model has been applied to predict the direct runoff hydrograph from the Chaukhutia watershed, a hilly sub-watershed of the Ramganga reservoir catchment in Uttaranchal (India). Using the kinematic-wave theory and Horton's stream-order ratios, the travel times for the overland and stream-flows of the watershed were probabilistically determined to develop the GIUH. The performance of the GIUH model was evaluated by comparing the predicted and observed direct runoff hydrographs for eight storm events.
Stream-order laws, GIUH, Hilly Watershed, runoff, kinematic-wave theory
