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中文摘要：
近年来,由于水田面积迅速增加,导致三江平原低湿地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,因此,三江平原的地下水资源平衡急需恢复。为解决上述问题,以853农场为例,应用小波理论对853农场实测年降水时间序列的多时间尺度变化特征及突变特征进行分析,揭示该区年降水变化的主要周期及旱涝变化趋势,为853农场乃至整个三江平原充分利用天然降水、地下水资源恢复及可持续利用提供科学依据。
英文摘要：
The rapid increase of paddy field acreage has led to widely descending of groundwater level in well irrigation paddy area of low-lying wetland in the Sanjiang Plain recent years. More and more ＂hanging pump＂ and partial overpumping have been occurring in well irrigation paddy area of low-lying wetland. Therefore, the groundwater resource balance in the Sanjiang Plain need to be recharged urgently. In order to solve above-mentioned problems, the authors took Farm 853 as example, analyzed the multi-time scales variation characteristics and jump characteristics of actual annual precipitation time series in Farm 853 through using the wavelet theory, and the main periods of annual precipitation change and variation trend of drought-flood in this area were revealed. The study can provide scientific gist for fully utilizing natural precipitation, groundwater resource recharge and sustainable utilization in Farm 853 so much as the entire Sanjiang Plain.
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