Abstract: The middle reaches of Yinma River,located 50 km east to Changchun in Jilin Province, is a potential place to build a pore groundwater reservoir,which will be an important strategic water resources field for Changchun City. Based on conditions of satisfying local water demand and no occurrence of environmental side effects, regulated water resources of 1.88×10⁸m³/a can be obtained from saved discharge and induced recharge, but it will change largely over time. Maximal regulation volume is 8.21×10⁸m³ and potential regulation volume is 4.98×10⁸m³ for the objective aquifer composed of Quaternary sands and grits. In the case of artificial engineering for water exchange, groundwater reservoir in the middle reaches of Yinma River can supply water resources of 8 197.9×10⁴m³/a theoretically.Just as a case study, this paper shows an overall idea about how to analyze and assess the feasibility of groundwater reservoir,from three aspects: sources,distribution, quality and quantity of regulated water; confined boundaries, structure and volume of regulating space; sites, ways and capacity of artificial exchanging engineering.

Key words: groundwater reservoir, regulated water, regulating space, water exchange conditions