Evaluation of artificial groundwater recharge using mathematical methods

Gareh Bygone floodwater spreading initiated in 1982 on the Gareh Bygone Plain, 50 km south east of Fasa, Fars Province, Iran. The object of this study is to evaluate the project in terms of groundwater recharge. Due to insufficient data on groundwater fluctuation, groundwater simulation was used in evaluation of the project. Some limited data, like soil moisture in 3 sites of flood schemes, data on wells in 1993 and approximation of the groundwater level in 1978, was used to validate numeric models. In order to estimate groundwater recharge, two mathematical models were applied. The average annual recharge to the ground, and average annual discharge were estimated. The models applied are three dimensional models of the MODFLOW, and one dimensional model of the SWATRE. MODFLOW was also used in predicting the groundwater table for the next 6 years.