吐鲁番市地下水功能评价

Evaluation of groundwater function in Turpan City

吐鲁番地处内陆,干旱缺水,地下水是其经济发展和环境维持的重要支撑,为了合理开发和利用吐鲁番地下水,急需开展地下水功能评价。本文以吐鲁番地下水为研究对象,选取地下水开采潜力、生态敏感性、土壤盐渍化程度为评价因子,采用ARCGIS软件对各指标进行空间分析,运用层次分析法确定各指标权重值,对地下水的资源、生态和地质环境功能综合评价。结果表明,北盆地沿火焰山一带及南盆地艾丁湖乡、恰特克勒乡、迪坎乡一带,地下水可持续开发利用;北部天山山区、北盆地、托克逊县南部地下水的综合功能一般,可利用性一般,不宜再大规模开采;南部山区及库木塔格沙漠地下水功能弱,地下水不宜开采利用。

Turpan is located in the inland,which is dry and short of water.Groundwater is an important support for its economic development and environmental maintenance.In order to rationally develop and uti⁃lize Turpan groundwater,it is urgent to carry out groundwater function evaluation.Taking the groundwater in Turpan as the research object,the groundwater exploitation potential,ecological sensitivity and soil sali⁃nization extent are selected as the evaluation factors.ARCGIS software is used to carry out spatial analysis for each index,and analytic hierarchy process is used to determine the weight value of each index,so as to comprehensively evaluate the resources,ecological and geological environment functions of groundwater.The results show that the groundwater can be used sustainably in the northern basin along the area of the mountain of Flames,and the area of Aydingkol lake township in southern basin,Chatterley township and Dikan township in the southern basin.The comprehensive function of groundwater in the northern Tianshan mountain area,the northern basin and the southern part of Toksun county is general,and the availability is general,so it is unsuitable for large-scale exploitation.The groundwater function in the southern moun⁃tainous area and the Kumutage desert is weak,and it is unsuitable for exploitation and utilization.