近些年来,由于水田面积迅速增加,导致三江平原井灌水稻区地下水位普遍下降,“吊泵”、局部超采现象时有发生.为解决上述问题,以853农场为例,对实测年降水资料进行差分和标准化处理,采用小波理论和随机水文学方法进行耦合分析,建立了年降小波随机耦合模型,精度检验结果表明,模型有效性和可靠性较高.该模型揭示了区域年降水量的时间变化规律,为853农场乃至整个三江平原充分利用天然降水、合理制定水稻灌溉制度以及地下水资源的恢复和可持续利用提供了科学依据. In recent years, due to the rapid increase of paddy field area, groundwater levels in well-irrigation paddy fields in Sanjiang Plain have generally dropped, and the phenomenon of “overspending pump” and local over-mining have occurred frequently.To solve the above problems, taking 853 farm as an example, The precipitation data were processed by difference and standardization, and the coupling analysis by wavelet theory and stochastic hydrology method was used to establish the stochastic coupling model of annual reduction wave. The accuracy test results show that the model is effective and reliable. The model reveals the annual precipitation The results showed that it provided a scientific basis for making full use of natural precipitation in 853 farms and even the entire Sanjiang Plain, rationally formulating rice irrigation system and the recovery and sustainable utilization of groundwater resources.