Contribution of hydrological modeling to the water resources assessment using soil-moisture accounting model: the case of the wadi Taria (Macta basin, NW Algeria)

摘要

This study concerned the contribution of HMS soil-moisture accounting (SMA) model to the water resources assessment in the case of uncertainty regarding gauged discharges. The wadi Taria catchment in Macta basin (NW Algeria) is considered in this study. Due to public insecurity (terrorism acts) during 1990s in Algeria, the quality of gauged flow rate was affected. The SMA model was calibrated from 09/01/1975 to 08/31/1975, and has been validated from 09/01/1985 to 08/31/1990 on a daily continuous time scale. The model results indicate that overall estimation of Taria streamflow during the calibration and validation periods is good and therefore may be accepted for correcting the wrong discharge data. For the calibration period, the model performance was very good with a percentage error in volume (PEV) = 4.76%, Nash-Sutcliffe efficiency (NSE) = 0.90, coefficient of determination R-2 = 0.90 and index of agreement d = 0.97. Similarly, the model performance for the validation period ranges from very good to good with PEV = 1.3%, NSE = 0.66, R-2 = 0.67 and d = 0.89. The wrong measured flow data collected from 09/01/1990 to 08/31/1998 underestimate annual flow volume with over 20% compared with the model results. This study ended-up optimistic result for the rainfall-runoff modeling. The SMA model can be used to simulate the rainfall-runoff process in the Macta basin.