塔里木河下游地下水位空间变异性研究

Research on underground water level spatial variability on the lower reaches of the Tarim River

塔里木河下游干旱缺水,地下水资源是生态健康的基本保障。本文采用线性回归法对塔里木河下游地下水位进行回归分析,并采用地统计学方法对当地地下水位的空间变异规律进行分析。结果表明:塔里木河下游各月地下水位与其测点空间坐标呈线性关系,具有很强的空间相关性;对于局部变化剧烈的地下水位,采用克里金平滑效应修正法可明显减小克里金插值所带来的平滑效应,但整体插值精度略低于普通克里金与泛克里金法。

The lower reaches of the Tarim River is dry and lack of water. Groundwater resources are the basic guarantee of ecological health. In the paper,linear regression method is adopted for regression analysis on underground water level on lower reaches of the Tarim River. Statistical method is adopted to analyze spatial variation law of local underground water level. The results show that underground water level on the lower reaches of the Tarim River has linear relation with spatial coordinates at the measuring points each month,which has strong spatial correlation. Kriging smoothing effect correction method is adopted for prominently reducing the smoothing effect brought by Kriging interpolation aiming at underground water level with sharp partial change. However,overall interpolation precision is slightly lower than ordinary Kriging and universal Kriging method.