Title: Yield assessment of reservoirs for ungauged catchments using rainfall data

Abstract

The present study proposes an empirical technique for the prediction of tentative yield expected from a reservoir propounded at any site in the study area. The proposed methodology was validated in two parts considering India as the case study region. In the first part, seventeen major river catchments of the country were examined to establish an empirical relationship between peak flow rate and average flow rate. The former was calculated using the rational formula while the latter was acquired from the WRIS portal. The generated equation provided the average streamflow value by using only the rainfall data of an aspiring reservoir location. In the second part of the validation, a mathematical model was established for computing the yield from a reservoir. The dependent variables were computed using the streamflow dataset of 212 sites, spread widely, across the country’s geography. The results of the present study may prove to be beneficial for the reconnaissance planning of a reservoir. The proposed methodology may also be applied to other countries/regions to achieve similar results.