克里雅绿洲地下水埋深与土壤盐分时空分异及耦合分析

Coupled analysis of spatio-temporal variability of groundwater depth and soil salinity in Keriya Oasis

在干旱区绿洲平原地带,地下水埋深与土壤盐分时空分异明显,且二者存在高度的交互耦合关系。为实现分时段、分区域对地下水进行综合利用及对土壤盐渍化进行有效治理,以克里雅绿洲为研究区,根据20个地下水样点及8个土壤样点的监测数据,采用经典统计学方法、地统计分析法及GIS技术对研究区地下水埋深与土壤盐分的时空分异进行了研究,并运用耦合系数模型计算了二者之间的耦合度。结果表明:地下水埋深夏秋季较深,冬春季较浅且研究区西北浅,东南深,由西北向东南递增;土壤盐分含量夏秋季快速下降,冬春季迅速上升且研究区西高东低,由西向东呈条带状递减分布;地下水埋深与土壤盐分含量之间存在交互耦合的关系。

In arid oasis plains,the depth of groundwater varies with the season,which makes the discretion of the soil salt produced variations,the groundwater depth and soil salt differentiation in time and space is obvious,and there is a high degree of interaction between the coupling relationship. In order to study the coupling mechanism of the depth of the groundwater and soil salt,realizing the period of time,area for the comprehensive utilization of groundwater and effective governance for the soil salinization,the paper chose the Keriya Oasis,South Xinjiang,China,as the study area,and 20 points of the groundwater and 8 points of soil salt were monitored for a long time and continuous monitoring data were got. With some classical statistical methods,statistical analysis and GIS in the study area,the paper analyzed the groundwater depth and soil salt of spatio-temporal variability rules and the coupling coefficient model,calculated by the coupling between them. The results show that the embedded depth of groundwater is deeper in the summer half year,shallow in winter half year,especially in northwest,deep in southeast,increased from the northwest to the southeast. Soil salt content is higher in summer half year and lower in winter half year,from west to east of diminishing distribution. Interaction between groundwater depth and soil salt content of the coupling relationship,both the coupling of the mean by coupling model calculation is in 0.7 above,the coupling degree is higher,and it is convenience for monitoring the groundwater depth and soil salt content in future. The effective measures to alleviate soil salinization,increase crop yield,increase the economic income and improve living standards quality,need to strengthen the groundwater management,reasonable control the buried depth. The result of the paper is basically identical with the predecessors’ studying,which may reflect the actual situation of the study area truly,and also make it more content to monitor the depth of groundwater and the salt of soil.