关中中部近10a地下水动态变化的区域响应分析--以咸阳市为例

An Analysis on Regional Responses of the Dynamic Variations of Groundwater in the Middle Areas of Guanzhong Plain in Recent Decades——A Case Study of Xianyang

通过分析关中中部典型地区-咸阳近十年来的典型井的地下水逐月数据,采用平均值法,回归分析法,相关分析法等方法发现咸阳近十年来降水呈缓慢增加的趋势,而气温则是在1998年后比较稳定而有降低的趋势,说明关中中部气候有湿润的迹象。分别研究咸阳市不同地貌区地下水的变化情况,发现渭河阶地区地下水在十年中呈明显的线型下降趋势,降水对它的影响并不明显;黄土台原区地下水位呈波动下降的趋势,水位的下降与降水量基本呈正相关,但在降水突变年,地下水位的变化具有滞后性,一般在下一年才体现出来;黄土高原丘陵沟壑区地下水位在2003年以前下降斜率很大,明显大于降水的下降斜率,2003年后水位有所回升,但2006年又开始下降。地下水下降导致本区出现多处漏斗区;产生了11处地裂缝;并且地下水硬度与矿化度明显升高,水质变坏。分析认为人为因素是本区地下水下降的主导因素,应该采取及时有效的措施。

According to the results of average method,regression analysis method,correlation analysis method,it was found that precipitation increased gradually,and tempuature kept stable and had a falling tendency after 1998.It was indicated that climate became wet in the middle areas of Guanzhong Plain.Study of groundwater variations showed that groundwater in terrace of Wei He dropped remarkably with linetype,it was not related with precipitation;Groundwater in Huangtu Taiyuan region showed the tendency of fluctuan...