Simulating streamflow and water table depth with a coupled hydrological model

Water Science and Engineering

Alphonce Chenjerayi Guzha¹  Thomas Byron Hardy² 

[1] Department of Agricultural and Biological Engineering, Southwest Florida Research and Education Center, University of Florida, Immokalee, FL 34142, USA;River Systems Institute, Texas State University, San Marcos, Texas 78666, USA;

关键词: hydrological modeling;    model coupling;    streamflow;    groundwater;    TOPNET model;    MODFLOW model;    Big Darby Watershed;   

DOI  :  10.3882/j.issn.1674-2370.2010.03.001

来源: DOAJ

【 摘 要 】

A coupled model integrating MODFLOW and TOPNET with the models interacting through the exchange of recharge and baseflow and river-aquifer interactions was developed and applied to the Big Darby Watershed in Ohio, USA. Calibration and validation results show that there is generally good agreement between measured streamflow and simulated results from the coupled model. At two gauging stations, average goodness of fit (R2), percent bias (PB), and Nash Sutcliffe efficiency (ENS) values of 0.83, 11.15%, and 0.83, respectively, were obtained for simulation of streamflow during calibration, and values of 0.84, 8.75%, and 0.85, respectively, were obtained for validation. The simulated water table depths yielded average R2 values of 0.77 and 0.76 for calibration and validation, respectively. The good match between measured and simulated streamflows and water table depths demonstrates that the model is capable of adequately simulating streamflows and water table depths in the watershed and also capturing the influence of spatial and temporal variation in recharge.

【 授权许可】

Unknown