邯郸地形变与地下水位动态相互关系研究

Research on Relationship between the Ground Deformation and Dynamic Groundwater Level in Handan, Hebei

摘要:

依据邯郸地区地质构造及20多年的观测资料,系统研究了地下水位、地壳形变的正常与异常动态变化及其相互关系。本区地形变的主控因素是西部太行山隆起和东部华北平原大幅度沉降的继承性运动,造成地形变向东南方向倾斜;在大区域的周期性强降水后由于地质构造因素地形变向西北向倾斜,形成水位和形变的正常动态变化。采用有效的定量方法提取异常,显示一部分反向西北倾斜的异常与华北的中强震有较好的对应关系。故强降水引起的地倾斜变化不应看作干扰,而是一种引起地壳变形地震前兆的外动力因素,应予高度关注。

Abstract:

Based on the geological structure of Handan area of Hebei province and the observation date more than 20 years, the normal and abnormal dynamic variations of ground deformation and groundwater as well as their relationship are analyzed. The main two control factors for the ground deformation in Handan area are Taihang mountains rising at west and the continual settlement movement of the northern China plain at east, which caused deformation slan to southeast. But after regional periodic heavy rainfall the deformation slan to northwest, because of the difference of geological structure. Both are normal variations. The anomalies in the deformation and groundwater level are extructed by effective methods, the result indicats that there was a good correspondence between a part of anomalies of opposing northwest slant and northern China plain moderate and strong earthquakes. So it should not be set dowe as interference that the ground lean with a wide and periodic hesvy rainfall. In a sence, it is a factor from out side to induce ground deformation and earthquake. So we shoule attach great importance to the factor.