Abstract: In order to efficiently utilize the groundwater resources in the Yong'an-Dahu Basin, Fujian, the methods of field investigation, data analysis, numerical simulation and hydrological analysis were used to analyze the basin's water storage capacity and possible environmental geological problems under exploitation conditions. Considering the constraints of reservoir regulation and coordinated control of environmental and geological issues, a suitable exploitation area was delineated with an area of about 37.38 km². The available storage capacity of this area was calculated to be 1.362×10⁷ m³, and the adjustable storage capacity was 8.03×10⁶ m³. On this basis, numerical simulation and hydrological analysis methods were used to calculate that the allowable exploitation quantity were 40 619.45 m³/d and 36 957.48 m³/d, respectively. Four ways (zoned mining, dual water supply, rainwater resource utilization, and water saving)were proposed to improve the utilization rate of groundwater resources realize the balance of comprehensive allocation of water resources, and control environmental geological disasters in Yong'an-Dahu Basin. The research will provide a basis for the efficient use of local water resources, and a reference for water resources exploitation in similar areas.

Key words: groundwater, reservoir regulation and storage, groundwater exploitation with disaster control, allowable exploitation quantity, efficient utilization