Regional Flow Duration Curves for Wang River Basins

Abstract

In this studies, the regional flow duration curves were prepared for Wang River Basins. More than 10-year daily flow records of 10 selected gauging stations in these river basins (catchment areas ranging from 95.7 to 10,442 square kilometers) were used in the analysis. The flow duration curves and dimensionless flow duration curves were construced at the gauging stations. In the regional analysis, river basins were devided into 3 subregions of similar hydrological condition. The regional flow duration curves models were constructed for each subregion, in which an equations for predicting the mean dischage and the maximum percent of time from physical parameters of the catchment were proposed for each subregion .The curves and equations obtained from this study could be used to estimate the design flow duration curve of any specified percent of time at any location, gauged or unguaged, within these river basins.