Estimation of Groundwater Recharge, Through Base Flow Analysis by PART andRORA Programs in Honifaghan Station, Fars

Estimation of groundwater recharge has an essential role in water resources management. Base flow component of stream flow is one of the main recharge sources. Base flow is sometimes used as an approximation of recharge when underflow, evapotranspiration from riparian vegetation, and other sources of ground water transfer to/ or from the watershed are minimal. In this research, Honifaghan station on Honifaghan River with 415 km2 watershed area in 110 km southwestern Shiraz was selected. Recharge estimates were made using streamflow records collected during 1353-1384.The base flows were predicted by PART Program and groundwater recharges were predicted by RORA program. The result shows that PART and RORA programs show the same results with high correlation to each other. Also it is found that baseflow component shows about 87 percent of streamflow in average. The study shows the importance of managing surface and groundwater together.