鲁西北平原深层地下水动力场时空演化

深层地下水是鲁西北平原区特有的含水系统，具有分布范围广、埋藏深和开采恢复能力差等水文地质特征。近30年来的人工开采使天然流场发生了较大改变，形成多个规模不一、形态各异的超采漏斗。利用多年来区域研究成果和实测资料，在研究区域地下水循环系统的基础上，分析开采初期和开采条件下特征年份深层地下水动力场特征，研究鲁西北平原深层地下水演化程度。研究发现，近30年来，区域水头整体下降，地下水动力场发生了显著变化。除黄河三角洲全咸水区、莘县阳谷、嘉祥凸起周围降幅较小外，其余地区均大于20m，其中德州一武城、滨州-博兴、菏泽城区降幅均在60m以上，德州、滨州漏斗中心降幅大于100m。目前已造成德州、滨州、东营、菏泽、济宁等城区不同程度的地面沉降。

Space and Time Evolution of Groundwater Dynamic Field in Northwest Plain in Shandong Province

Deep groundwater is unique aquifer system of northwest plains. It has the hydrogeological characteristics of wide distribution, buried deep and poor mining recovery. Due to labor exploitation in 30 years, natural flow field has changed a lot, and formed several over--exploitation funnels with different size and different patterns. By using regional research and measured datas in many years, on the basis of studying regional groundwater circulation system, deep groundwater dynamic field characteristics of early years or in the characteristics year under exploitation condition, the evolution degree of deep groundwater in northwest plains has been studied. As showed by the study result, it is found that nearly 30 years, regional water head had been overall declined, and groundwater dynamic field had a significant change. Amplitude reductionln is small in the whole salt water area in the Yellow River Delta , Shenxian--Yanggu area and Jiaxiang uplift, while it is over than 20m in other areas. In Dezhou--Wucheng, Binzhou-Boxing and districts in Heze city, the amplitude reduction are over 60m, while its is more than 100m in Dezhou and Binzhou funnel center. At present, ground subsidence has been caused in Dezhou, Binzhou, Dongying, Heze and Jining city.