塔里木河上游荒漠河岸林土壤水分与浅层地下水分布规律研究

发布时间：2019-03-29 12:28

【摘要】：【目的】为研究荒漠河岸林生态系统的耗水规律。【方法】本研究选择塔里木河上游流域作为研究区,通过采集不同土层的土壤样品测定其含水量,并量测不同覆盖度的浅层地下水埋深,分析了荒漠河岸林土壤水分、浅层地下水埋深时空变化规律及二者之间关系。【结果】不同覆盖度土壤水分差异显著,覆盖度越高,土壤保墒能力越强,土壤含水量越高;覆盖度越低,土壤水分活跃程度越高;同一覆盖度不同月份土壤含水量随深度的变化趋势大致相同,各覆盖度土壤含水量垂直变化特征总体满足随着土层深度的增加而增大;覆盖度高的各层土壤含水量随时间变化范围小。【结论】各覆盖度由表层到底层土壤含水量变化幅度与覆盖度有关,植被和地下水埋深越深可以有效控制土壤水分变化,而河道侧渗对地下水的补给却具有一个延迟作用。
[Abstract]:[objective] to study the water consumption law of desert riparian forest ecosystem. [methods] the upper reaches of Tarim River were selected as the study area, and their water content was determined by collecting soil samples from different soil layers. The spatial and temporal variation of soil moisture and shallow groundwater depth in desert riverbank forest and the relationship between them were analyzed by measuring the depth of shallow groundwater with different coverage. [results] the difference of soil water in different coverage was significant, and the higher the coverage was, the higher the soil water content was, and the higher the soil water content was, the higher the soil water content was. The stronger the soil moisture preservation ability, the higher the soil moisture content; The lower the coverage is, the higher the soil moisture activity is, and the change trend of soil water content with depth is approximately the same in different months with the same coverage, and the vertical variation characteristics of soil water content in each coverage degree generally increase with the increase of soil depth. [conclusion] the variation range of soil water content from surface layer to bottom layer is related to the coverage degree, and the deeper the vegetation and ground water depth, the more effective the soil moisture change can be controlled by vegetation and groundwater depth. However, river lateral seepage has a delayed effect on groundwater recharge.
【作者单位】：塔里木大学植物科学学院;
【基金】：国家自然科学基金(31260140);国家自然科学基金(31260140) 兵团青年科技创新资金专项(2012CB020)2016-10-17资助项目;兵团青年科技创新资金专项(2012CB020)
【分类号】：S714

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