华北平原典型区地下水动态变化趋势及其区域响应

根据1985～2007年的华北平原典型区-邢台地区的地下水埋深数据以及近37年的气象数据,运用线性回归法、相关性分析、5年滑动平均法等方法,分析该地地下水位变化趋势,比较不同地质单元地下水对气候变化的响应,结果表明:邢台平原区浅层地下水以0.89 m/a的速率下降,深层地下水以南官为例下降速率为0.78 m/a,产生地面沉降、漏斗扩大、地裂缝产生负效应,其原因在于研究区的气候趋于暖干化和人类的生产生活活动导致地下水长期处于采补失衡状态.各地质水文单元地下水与气候因素相关性存在明显差异.研究区暖干化趋势明显,影响地下水位的变化,而人为因素是本区地下水下降的主导因素.

The Tendency of Groundwater Dynamic Variation and Regional Response in Typical Area of North China Plain

According to the data of groundwater depth and meteorological data during the year 1972-2008,about the typical area,Xingtai,located in North China Plain,using the regression analysis and correlation analysis as well as the five-yearmoving average,it was found that shallow groundwater declined in the rate of 0.89 m/a and deep groundwater descended in the rate of 1.53 m/a,which brought about land subsidence,tundish enlargement and interstices emergence.The real reasons are the climate warming up and the human activity.There is significant difference of the corelation between hydrogeological units' groundwater levels and the climate factors.It is certain that the climate warming has influenced on the groundwater variation.But the study believes the dominant element is human activity.