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为研究不同地下水位下的干旱区河谷林水分动态变化、消耗规律及维持河谷林正常生长的临界地下水埋深及其年内变化过程,利用HYDRUS-1D软件建立了河谷区地下水—土壤—植物—大气连续体(GSPAC)水分传输模型,对新疆额尔齐斯河干流河谷林水分动态过程进行模拟分析。结果表明:河谷林实际腾发量随地下水位的降低而减小,维持河谷林正常生长的临界地下水埋深(河谷林各月旬最小耗水比例达到70%时的地下水埋深)随时间变化,河谷林生长期4～10月临界地下水埋深分别为6.2m、4.2m、2.8m、3.5m、9.5m、12.2m和8.3m。
In order to study the dynamic changes and consumption patterns of water resources and the critical groundwater depth and its variation during the year in different valleys of arid valleys, HYDRUS-1D software was used to establish the groundwater-soil-plant-atmosphere Continuous body (GSPAC) moisture transfer model to simulate the dynamic process of forest water in the valley of Irtysh River in Xinjiang. The results showed that the actual evapotranspiration of the river valley decreased with the decrease of the groundwater level, and the critical groundwater depth (the groundwater depth at the minimum monthly water consumption of 70% of the river valley in each month) to maintain the normal growth of the river valley changed with time The critical depth of the groundwater from April to October in the valley was 6.2m, 4.2m, 2.8m, 3.5m, 9.5m, 12.2m and 8.3m respectively.