It is necessary for the sustainable use of groundwater resource to understand the water balance between groundwater recharge rate and pumping rate in order to avoid groundwater level lowering and ground subsidence. In this paper, it was shown that the groundwater recharge rate from Ibi river evaluated by the river discharge observation on an alluvial fan in the Nobi plain was about 14m3/s during the period of water shortage. Then, the flow path of groundwater recharged from the river was evaluated based on the groundwater recharge rate from the river and on the resemblance of the ions data between the groundwater and the river water. It was revealed that the main groundwater flow path was located along the former river channel of Ibi river.
