Abstract: Large quantity of continuously groundwater pumping in an area forms regional groundwater depression cone, and overexploitation leads to a series of environmental and geological problems. Groundwater level can be recovered by artificial regulation of water resource in the empty underground space of the depression cone. Artificial regulation in groundwater depression cone is significant to Daqing, where groundwater is the main water supply resource. The authors designed and simulated four artificial regulation projects in the depression cone zone in west of Daqing, which are current pumping, reduced pumping, and artificial recharge based on current and reduced pumping. The result indicates that reducing the exploitation quantity and using artificial recharge methods can accelerate the recovery of depression cone. When reducing the quantity of groundwater pumping by 5% every year and executing artificial recharge(0.45×10⁸m³/a), the recovery effect of groundwater level is more obvious than other projects, and groundwater level of the centre of depression cone will be recovered by 7.7-10.3 m up to the end of 2010.

Key words: depression cone, artificial regulation, artificial recharge, west of Daqing