内陆河流域植被变化与地下水运动的耦合关系

以流域水量均衡为基础，以植被变化对地下水的影响作为源汇项，建立了内陆河流域二维地下水运动模拟模型。根据荒漠植被区的气候条件，依地下水埋深划分并合并植被变化方式为几种类型，以面状因子处理源汇项。绿洲区的灌水、抽水等源汇因子对地下水影响最大，根据不同作物的灌溉制度详细计算随时间变化的源汇量。其他植被变化类型上的源汇因子相对次要，主要是有限的降水和凝结水入渗及蒸散，具体数量分配在某一时段。用GIS处理区域植被变化的空间数据，与专业计算地下水流的FEFLOW软件结合，模拟了植被变化对地下水位的影响。结果表明：扇缘带上部地下水位仍然保持下降，冲洪积平原地下水位继续上升的趋势；其结果将是扇缘带上部植被有趋于退化，冲洪积平原土壤盐化进一步发展的趋势。

Coupling relationship between vegetation evolution and groundwater flow in internal continent river basin

The GIS is applied to combine with FEFLOW, the special software modeling groundwater flow with finite element method,to model groundwater flow affected by vegetation in Sangong River basin, Xinjiang Autonomous Region, China. The spatial variation of vegetation change is regarded as source/sink factors of groundwater.The result shows that the model successfully simulates the effect of vegetation with different types on groundwater table. It is indicated that the groundwater table of upper area of oasis will descend, but in the lower area will rise continuously. This situation will result in the regression of vegetation in the upper area and salinization becomes more serious in lower area.