Integrated Hydrological Modeling to Analyze the Effects of Precipitation on Surface Water and Groundwater Hydrologic Processes in a Small Watershed

The main objective of this study is to evaluate the performance integrated hydrological model, MIKE SHE in a small watershed analyze effect two different precipitation sources on model outputs (groundwater elevation and surface water flows). was calibrated validated with observed groundwater elevations flows measured at United States Geological Survey (USGS) gage stations basin. calibration for (R = 0.80, MAE= 0.20 m3/s, BIAS ?0.14 NSE 0.59) 0.74, MAE 0.45 m, 0.08 0.35) showed that able predict processes based forcing variables watershed. analysis did not show nearer (NOAA-Edwardsville) gauge station has better than farther (NOAA-St. Louis). quantitative analyses most sensitive output variable suggested uncertainties had noticeable impacts (0.81% 11.19%), (0.06% 0.07%), an average 6.71% 0.66%, respectively. Our results differences simulated spring (12.9%) winter (36%) seasons compared summer (11.4%) fall (4.6%) as result difference (6% 18%) precipitation, which indicated impact vary seasons. have shown affects care should be taken while selecting input datasets (i.e., precipitation) performance, specifically flows.