沙漠绿洲区平原水库下缘盐荒地水盐动态规律

发布时间：2018-05-08 23:41

  本文选题：平原水库 + 盐荒地　； 参考：《干旱区研究》2017年05期

【摘要】：为揭示平原水库周边无灌溉盐荒地及防风林生长区水盐分布特征,在沙漠绿洲区多浪水库南库区周围布设了地下水监测井和土壤监测点,进行了为期2 a的逐月地下水埋深监测和土壤含水率及含盐量的定点取样测定试验。结果表明:库区周边盐荒地地下水埋深随监测时段变化变幅不大,2 a内均值为1.28 m;不同土壤含水率整体随土层深度增加呈升高趋势,其中60~100 cm的土壤含水率较其他土层波动较大。2 a间盐荒地的土壤含盐量在0.48~8.86 g·kg~(-1)之间变化,不同土壤总盐含量随土层深度增加呈减小的趋势,0~40 cm土层含盐量变化较为明显,具有显著的盐分表聚现象,其中,防风林地土壤含盐量在0~40 cm土层内较天然生态林地明显降低。
[Abstract]:In order to reveal the distribution characteristics of water and salt in no-irrigated wasteland and windbreak growing area around the plain reservoir, groundwater monitoring wells and soil monitoring points were set up around the south reservoir area of Dulang Reservoir in the desert oasis area. The monitoring of groundwater depth and the determination of soil moisture content and salt content were carried out for 2 years. The results showed that the groundwater depth of salt wasteland around the reservoir area changed little with the monitoring period, the mean value within 2 years was 1.28 m, and the whole soil moisture content increased with the increase of soil depth. The soil moisture content of 60 ~ 100 cm soil fluctuated more than that of other soil layers. The salt content in the saline wasteland varied from 0.48 to 8.86 g kg 路kg ~ (-1). The total salt content of different soils decreased with the increase of soil depth. The change of salt content in the soil layer of 40 cm was more obvious than that of the other soil layers, and the soil salt content in the saline wasteland varied from 0. 48 to 8. 86 g 路kg ~ (-1). The results showed that the salt concentration in the soil of windbreak forest was significantly lower than that of the natural ecological forest in the 0 ~ 40 cm soil layer.
【作者单位】： 塔里木大学水利与建筑工程学院;
【基金】：塔里木大学校长基金硕士项目“沙漠绿洲区平原水库周边土壤水盐动态变化研究”(TDZKSSZD201404)资助
【分类号】：S156.4
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本文编号：1863629