How to Constrain Multi-Objective Calibrations of the SWAT Model Using Water Balance Components

摘要: Accurate discharge simulation is one of the most common objectives hydrological modeling studies. However, a good not necessarily result realistic processes within catchment. We propose an evaluation framework that considers both and water balance components as criteria for calibration Soil Water Assessment Tool (SWAT). In this study, we integrated average annual values surface runoff, groundwater flow, evapotranspiration in model procedure to constrain selection runs Little River Experimental Watershed Georgia, United States. For evaluating dynamics, Nash-Sutcliffe efficiency (NSE) percent bias (PBIAS) were used. addition, ratio root mean square error standard deviation measured data (RSR) was calculated individual segments flow duration curve identify best terms magnitude. Our results indicate statistics do guarantee simulations components. Therefore, recommend constraining ranges achieve more entire system, even if tradeoffs between reasonable amounts are unavoidable. Editor's note: This paper part featured series on SWAT Applications Emerging Hydrologic Quality Challenges. See February 2017 issue introduction background series.