Hydrological Analysis of Extreme Rain Events in a Medium-Sized Basin

The hydrological response of a medium-sized watershed with both rural and urban characteristics was investigated through event-based modeling. Different meteorological event conditions were examined, such as events high precipitation intensity, double peak, mainly normal to wet antecedent moisture conditions. Analysis the hydrometric features conducted by comparing different rainfall time intervals, total volume water, precedent soil moisture. Parameter model calibration validation performed for under similar conditions, examined in pairs, order verify two models, lumped HEC-HMS (Hydrologic Engineering Center’s Hydrologic Modeling System model) semi-distributed HBV-light (a recent version Hydrologiska Byråns Vattenbalansavdelning model), at exit six individual gauged sub-basins. Model verification achieved using Nash–Sutcliffe efficiency error index. concentration (Tc) formulas are better applied sub-watersheds respect dominant land uses, classifying Tc among most sensitive parameters that influence appearance magnitude peak modeled flow model. maximum water content box (FC) affects via model, whereas MAXBAS parameter has greatest effect on displayed discharge. modeling results show had less compared their pairs. higher precipitated produced rest satisfactorily models. April July is flood hazard period will be worsened climate change. suggested calibrated severe can used prediction future features. above resources management basin.