新疆恰拉水库下游土壤非冻结期水盐动态分析

Analysis of Soil Water-Salt Dynamic during Non-Freezing-Period in Qiala Reservoir Downstream in Xinjiang

以位于内陆干旱平原区的新疆尉犁县恰拉水库下游荒地水盐动态为研究对象,依据为期1年的定点监测资料,对监测点的地下水位、地下水矿化度和土壤含盐量结果进行分析。分析显示,水库的大量渗漏是导致下游地下水位上升和土壤次生盐渍化的根本原因。为减轻平原水库对下游水土环境不利影响,关键是修建防渗、截渗和排水等辅助工程设施。

In this paper, the water-salt transport dynamic of downstream barren land of Qiala reservoir in the inland arid area of Yuli County, Xinjiang, is studied. According to one-year fixed-point monitoring data, the groundwater levels, total dissolved solids and soil salt content are analyzed. The result indicates that large leakage of the reservoir is the basic reason for phreatic rise of reservoir downstream and soil secondary salinization. To mitigate the adverse effect of plain reservoir on downstream soil and water environment and avoid aggravation of salinization in surrounding areas, the key measure should be taken is building auxiliary engineering fa- cilities including anti-seepage, cutting infiltration and drainage engineering.