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【目的】了解玛纳斯河流域土壤水分的空间分布规律,为玛纳斯河流域灌溉水的高效利用、土壤盐渍化的改良提供更为精确的理论参考和科学依据。【方法】以玛纳斯河流域内的玛纳斯灌区和莫索湾灌区为例,在灌区农田内,利用GPS技术定点、采集土壤样品;利用室内分析技术测定出其土壤水分含量;并应用地统计学和传统统计学的方法对土壤水分空间分布特征进行分析。【结果】玛纳斯河流域农田0~20与20~40cm深度土壤含水量的最小值、最大值的变化趋势是随着深度的增加而增加,均属于强空间相关性,且0~20cm深度的结构性好于20~40 cm。0~20 cm深度土壤水分空间变异较大,而20~40 cm深度土壤水分空间变异不大。【结论】玛纳斯河流域农田0~20 cm与20~40 cm层土壤含水量属于中等变异程度,且0~20 cm深度土壤水分空间变异程度大于20~40 cm深度。
【Objective】 The objective of this study was to understand the spatial distribution of soil moisture in the Manas River basin and to provide a more accurate theoretical and scientific basis for the efficient utilization of irrigation water in the Manas River basin and the improvement of soil salinization. 【Method】 Taking Manas Irrigation Area and Moso Bay Irrigation Area in Manas River Basin as an example, soil samples were collected by GPS technology in farmland of irrigation area. Soil moisture content was determined by indoor analysis technique. Statistical and traditional statistical methods to analyze the spatial distribution characteristics of soil moisture. 【Result】 The results showed that the minimum value and the maximum value of soil water content in 0 ~ 20 and 20 ~ 40 cm soil depths in Manasi River watershed increased with the increase of depth, belonging to the strong spatial correlation. The depth of 0 ~ 20 cm The structure is better than 20 ~ 40 cm. Spatial variability of soil moisture at 0-20 cm depth was larger, while spatial variability of soil moisture at 20-40 cm depth was not significant. 【Conclusion】 Soil moisture in 0 ~ 20 cm and 20 ~ 40 cm layers of farmland in Manas River Basin belongs to medium degree of variability, and spatial variability of soil moisture in 0 ~ 20 cm depth is greater than 20 ~ 40 cm depth.