拉萨市河谷平原区地下水位动态特征及影响因素  

Analysis of groundwater level dynamic characteristics and influencing factors in Valley Plain of Lhasa City

作　　者：王丹 唐蕴[1] WANG Dan;TANG Yun(China Institute of Water Resources and Hydropower Research,Beijing 100038,China;The Nuclear Industry 247 Bridge of Tianjin North China Geological exploration,Tianjin 301800)

机构地区：[1]中国水利水电科学研究院,北京100038 [2]天津华北地质勘查局核工业二四七大队,天津301800

出　　处：《地质通报》2024年第6期971-983,共13页Geological Bulletin of China

基　　金：国家科技部项目《艾丁湖流域地下水合理开发及生态功能保护研究与示范》(编号:2017YFC0406102);水利部项目《重点地区地下水水位控制指标研究》(编号:WR0145B502016)。

摘　　要：为加强拉萨市河谷平原区地下水资源的合理开发和可持续利用,以拉萨市城关区为例,对拉萨市河谷平原区地下水位动态特征及影响因素进行分析。对1996—2015年拉萨城关区地下水位进行了年内与年际变化特征分析,运用反距离加权法(IDW)进行空间插值,得出地下水位空间分布及变幅。利用Pearson相关分析法及灰色关联分析法对城关区地下水位动态的影响因素及各因素影响程度进行了分析。分析结果显示,城关区地下水位具有东高西低,中间高南北低的空间分布特征。1996—2015年间地下水位逐年下降,下降范围为0.2~3.7 m,年均降幅为0.01~0.19 m。地下水位动态受降水量、气温、开采量、建设用地面积的共同影响,影响程度为:气温>降水量>建设用地面积>开采量。In this paper,taking Chengguan District of Lhasa City as an example,the dynamic characteristics and influencing factors of groundwater in the valley plain of Lhasa City are analyzed.The intra-year and inter-annual variation characteristics of groundwater level from 1996 to 2015 in Chengguan District are analyzed,and the spatial interpolation of inverse distance weighting method(IDW)is used to obtain the spatial distribution and amplitude of groundwater level.The Pearson correlation analysis method and the Grey correlation method are used to analyze the influencing factors of groundwater level dynamics in Chengguan District and the degree of influence of each factor.The analysis results show that the groundwater level has the distribution characteristics of high in the east and low in the west,high in the middle,and low in the north and south.From 1996 to 2015,the groundwater level decreased year by year,with a decline range of 0.2~3.7 m,and an average annual decline is between 0.01 m and 0.19 m.The groundwater level is jointly affected by precipitation,temperature,extraction and the construction land area.The degree of influence is:the temperature>precipitation>the construction land area>the amount of groundwater extraction.

关 键 词：拉萨市河谷平原区 降水量 地下水位动态 影响因素 

分 类 号：P641.2[天文地球—地质矿产勘探]