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鄂尔多斯遗鸥自然保护区属于典型的半干旱区高原内陆湖泊湿地,地下水是其重要水源之一。本文以遗鸥湿地所在的泊江海子流域为研究对象,系统分析了地层岩性、含水系统及富水性、地下水流场特征、地下水水化学特征等基础水文地质条件,并计算了地下水系统的水均衡。结果表明:泊江海子流域主要有松散岩类孔隙含水层和碎屑岩类孔隙裂隙含水层,松散岩类孔隙地下水严格受闭流盆地地形条件控制;碎屑岩类孔隙裂隙地下水主要受区域地形及水文系统控制;大气降水补给和侧向径流补给是泊江海子流域地下水的主要补给源,两者约占总补给量的85%,而潜水蒸发和人工开采是地下水的主要排泄方式,约占整个系统排泄量的89%,1996年-2005年,泊江海子流域地下水总的年均补给量为6358.9×104m3/a,总排泄量为7418.2×104m3/a,地下水均衡差为-1059.3×104m3/a;桃-阿海子接受的地下水补给量约为142.5×104m3/a,占桃-阿海子湖泊总补给量的22%,是桃-阿海子湖泊的一个重要的补给来源。
Ordos Relict Gull Nature Reserve belongs to typical inland lake wetland of semi-arid plateau, and groundwater is one of the important water sources. Based on the analysis of the basic hydrogeological conditions such as lithology, aquifer system, water-rich characteristics, groundwater flow characteristics and groundwater hydrochemical characteristics, the paper analyzes the water quality of groundwater system balanced. The results show that there are loose aquifer pore aquifer and clastic rock pore aquifer in Pojiang Haizi catchment. The unconsolidated rock pore water is strictly controlled by the topography of the closure basin. The clastic rock pore fissure groundwater is mainly affected by the regional topography And the control of hydrological system. Atmospheric precipitation recharge and lateral runoff recharge are the main recharge sources of groundwater in Pojiang Haizi catchment, accounting for about 85% of the total recharge, while submersible evaporation and artificial extraction are the main ways to discharge groundwater, accounting for about The total amount of system discharge was 89%. From 1996 to 2005, the total average annual groundwater recharge in Pizhou River Basin was 6358.9 × 104m3 / a and the total discharge was 7418.2 × 104m3 / a. The groundwater balance difference was -1059.3 × 104m3 / a; Peach - A Haizi groundwater recharge is about 142.5 × 104m3 / a, accounting for 22% of the total supply of peach - Ahai Lake lakes, is an important source of Peach - Ahai Lake replenishment.