Runoff Estimation in Ungauged Basin (Hydrogeomorphological Approach): Interaction of Hydrology & Geomorphology

Runoff estimation of ungauged river basins has long been recognized as a subject of scientific investigations. Catchments in many parts of the world especially in developing and underdeveloped countries are ungauged or poorly gauged, and in some cases existing measurement networks are declining. Association of Hydrological Sciences (IAHS) launched a new programme named Predictions in Ungauged Basins (PUB) aimed at formulating and implementing appropriate science programme to engage and energize the scientific community, in a co-ordinated manner, towards achieving major advances to make predictions in ungauged basins. In India, good hydrologic network exists in some parts while in many other parts; networks suffer from lack of skilled manpower and proper measurement techniques. Thus the measurable hydrological and geomorphological parameters have potential to describe some important drainage basin properties and it also provides a simple means for hydrologic simulation, hydrograph synthesis, and quantification of flow process and to understand the rainfall-runoff relationship particularly of ungauged basin.