基于样本熵的区域地下水埋深序列复杂性分析

In order to describe the complexity characteristics of regional groundwater depth series，taking Jiansanjiang branch bureau as sample，the complexity of groundwater depth series in nine production teams of five farms in Jiansanjiang branch bureau was analyzed by the sample entropy method. The results show that the complexity order of each groundwater depth series from big to small as follows：12th production team of Farm Hongwei，2nd production team of Farm Chuangye，1st production team of Farm Hongwei，10th production team of Farm Shengli，2nd district of Farm Honghe，31th production team of Farm Shengli，8th district of Farm Honghe，3rd district of Farm Erdaohe，6th district of Farm Erdaohe. The key driving factor in causing the complexity of the groundwater depth series is the groundwater exploitation. The change of groundwater depth condition can be reflected by the sample entropy method which needs less data and is sensitive and steady. The research achievements reveal the complexity of local groundwater resources system，and provide scientific basis for rationally utilizing and developing groundwater resources in Jiansanjiang branch bureau and even in the whole Sanjiang Plain.