Dr. M. L. GaurEr. NIRAVKUMAR J. BUTANI2021-07-312021-07-312019https://krishikosh.egranth.ac.in/handle/1/5810171247The planning, design and management of any water resources projects require good estimates of stream flow and peak discharge at certain points within a basin, which in fact comprised watersheds of varied sizes. To achieve it the observed meteorological and stream flow data are invariably needed for understanding various hydrological processes/response on such watersheds. Majority of the watersheds of the world are remains genuinely ungauged, whereas others poorly gauged or previously gauged, where measurement discontinued due to instrument failure or termination of a measurement program. Situation is graver under tropical situations like India, and the tribal regions, wherenumerous associated factors makes the condition bad to worse. These factors include uncertain and limited rains with high temporal and spatial variability, marginal land holdings, sharp and frequent land use changes, intensive cultivation on small land holdings/smaller micro watersheds, and above all the dearth of relevant hydro-climatological data. The only option remains to bridge such gap is by using plethora of simplistic models and approaches with which adequately accurate predictions of surface runoff are feasible. Only thing requires to achieve such goals remains the availability of regional values for key input parameters of such models.EnglishThesis