昌平区地下水位变化特征分析

Analysis on variation characteristics of groundwater level in Changping District

昌平区近年来水资源的需求量持续增加,供水主体仍然为地下水,然而地下水资源的可利用量却有所降低。利用GIS技术,结合昌平区的水文地质条件,分析了昌平区地下水位年内变化、年际变化特征和地下水埋深的空间分布变化规律。结果表明,地下水位的年内波动较大;年际来看,2009—2015年地下水位逐年下降,自2016年起开始恢复和抬升;与2009年相比,2019年地下埋深大于30 m的区域面积明显增加,小于20 m的区域面积明显缩减,水位平均下降3.62 m,最大下降深度13.86 m,西部降深较大,东部降深较小,八仙庄、东二旗地区水位有所回升。此研究对昌平区地下水资源管理和利用具有重要意义。

The demand for fresh water in Changping District continues has continued to increase inrecent years,and the main water supply is still groundwater,however,the amount of groundwaterresources has decreased.Based on the GIS and combined with the hydrogeological conditions ofChangping District,this paper analyzed the intra-annual and inter-annual variation of the groundwaterlevel as well as the spatial distribution characteristics and change rules of groundwater depth.The resultsshowed that the groundwater level experienced a greater fluctuation during the year.It decreased year byyear from 2009 to 2015 and began to recover and rise from 2016.Compared with 2009,in 2019,the areawith groundwater depth greater than 30 m increased significantly,while which is less than 20 mdecreased obviously.The groundwater level generally declined in 2019,with an average drawdown of3.62 m and a maximum drawdown of 13.86 m,a larger drawdown in the west,and a smaller drawdown inthe east.The groundwater level in Baxianzhuang and Dongerqi areas rose to some extent.This paper hasimportant significance for the study and utilization of groundwater resources in Changping.