中文摘要：

在分析河套灌区适宜埋深的基础上，利用数值模拟模型分析了不同开采系数下灌区地下水埋深动态变化，确定了不同水质分区的地下水合理开采系数：矿化度≤3g·L^-1区域的开采系数为0．7，矿化度〉3g·L^-1区域的开采系数为0．5．

英文摘要：

With decreasing total amount of irrigation water taken from the Yellow River, conflict between demand and supply in water use will be more acute. To use groundwater more efficiently to control groundwater table are 2 key factors to ensure sustainable use of water resources to prevent soil salinization and desertization. Groundwater dynamics at a reasonable depth was simulated under different withdrawal coefficients for Hetao irrigation district. Data showed that the reasonable allowable withdrawal coefficients for areas of total dissolved solid ≤3g·L^-1 was 0.7 and 〉3g·L^-1 was 0.5.