Comparative Study of Flood and Long-term Mean Monthly Flow Estimation Approaches: Case Studies of Six Basins in Nepal


 Most of Nepal's river basins have poor hydro- meteorological databases, with several being ungauged. Thus, hydrological parameters need to be estimated using different types computation methods. The primary goal this study is identify the most accurate method for calculating peak flood and long-term mean monthly flow among commonly used methods in Nepal. We compared calculated various formulas, such as Hydest, Modified MHSP (Medium Hydropower Study Project) 1997, Dickens, PCJ (Prem Chandra Jha) 1996, Rational, Specific Discharge, gauged discharge data frequency analysis. find that it wise use Hydest khokana basin all Return Periods (RPs) Belkot (for RP ≤ 100 years), Discharge Jamu basin, 1997 years) Bagasoti Gaun 20 years). 1996 having lowest cumulative value Root Mean Square Error (RMSE) six studied catchments suitable Rabhuwa Bazar > 50 >20 Similarly, Dickens years. This paper also shows performance estimation suggests coefficients or constants MIP Irrigation Project), obtain more reliable flows. Overall, our will help designer choose a design estimation. obtained from even needs adjusted. As result, intensive research required adjust previous develop new one.