小流域河川の地下水-表流水間の相互作用を考慮した水循環解析
―大原川を事例としてー
キーワード:
interaction between surface and subsurface water,
222Rn,
groundwater flow model river flow discharge
2019 年 25 巻 p. 7-12
詳細
2019 年 25 巻 p. 7-12
Around the Ito campus of Kyushu University, located in western Fukuoka city, groundwater is a major source for drinking water and industrial greenhouse water supplies. For a better management of available water resources in this area, a combined study of a field tracer test and numerical simulations was made to investigate the interaction between groundwater and surface water in the Obaru river basin. These results revealed an active exchange between groundwater and surface water. So, a new numerical analysis model is developed by adding the following the two conditions:1) the existence of former channel of the Obaru river, and 2)phenomenon of groundwater flow out to river. As a results, the calculated river flow discharge and its observed value showed good correlation at the observation point.
