Application of Analytic Hierarchy Process in Optimization Selection of Groundwater Artificial Recharge Methods in Sanjiang Plain

With the rapid increase of paddy area, the groundwater level of well irrigation paddy area in Sanjiang Plain has widely declined in recent years, which has led to more and more "hanging pump", partial overpumping and a series of water environmental problems. Therefore, the groundwater resource dynamic balance in Sanjiang Plain needs to be recovered urgently. In order to solve above-mentioned problems, taking Hongxinglong branch bureau of Heilongjiang state farm for example, this paper optimizationally selects and sorts groundwater artificial recharge methods with the analytic hierarchy process (AHP for short), and proposes large-diameter well recharge is the optimum method. The study can provide scientific gist for groundwater artificial recharge practice and sustainable development of agriculture in Hongxinglong branch bureau and even the entire Sanjiang Plain.