阿里第四系地下水资源形成控制因素研究

Formation and controlling factors of groundwater resources in quaternary of Ali Area

西藏自治区阿里地区地处藏西北,位于世界屋脊之巅,地貌上以高原湖盆地带为主,属于极端缺水的贫困地区。干旱缺水严重制约了当地农牧业的发展,因此迫切需要查明该地区地下水资源的分布规律。文中从青藏高原隆升这个大的地质背景入手,详细分析阿里地质与水文地质条件,通过对阿里第四系地下水系统分析认为:本区受水汽运移、第四系松散堆积物成因、水系空间展布以及气温的影响,第四系地下水资源分布规律为分布不均,从南往北依次减少,中北部大范围地区为干旱地区。

Ali area lies in the northwest of the Tibet Autonomous Region,which locates at the peak of the world ridge.The topography of Ali area is dominated by altiplano lake basin terrain,and it belongs to the extreme water-scarcity poverty backwater area.The truth of extreme water-scarcity restricts the development of local agriculture and livestock production seriously,so it is imperative for us to find out the regularities of the groundwater resource distribution.Begining with the geological background of the uplift of Qinghai-Tibet plateau,and based on the synthesis detailedly research of the hydrogeology condition and groundwater system in Ali area,we draw an overall conclusion that the distribution of water resource in quaternary is not well-proportioned,is controlled by the water vapor transport、different kinds of deposit cause of formation、the distribution of river and the temperature,from southern to northern are sequence reduce,therefore the great mass of midland and northern region belong to drought areas.