吐鲁番盆地地下水埋深的时空变异特征

Spatial-Temporal Variability of Groundwater Level in Turpan Basin

根据吐鲁番盆地绿洲内布设的34眼长期观测井2007—2013年的地下水埋深监测数据,在ArcGIS10.1的支持下,运用地统计学方法研究了地下水埋深的时空变异特征,利用普通克里格插值法分别绘制了2007年和2013年地下水埋深的空间分布图,并进行了比较分析。结果表明:半变异函数的指数理论模型所预测的指标完全反映了吐鲁番盆地地下水的空间结构和变异特征;2007年具有中等强度的空间相关性,而2013年具有较强的空间相关性;吐鲁番盆地地下水埋深在空间上东西方向具有明显的变化趋势;从整体上看,吐鲁番盆地地下水位具有继续下降趋势,主要受自然环境因素和人为因素的影响。

Based on the groundwater monitoring data of 34 long-term monitoring wells in Turpan Basin oasis from 2007 to 2013, with the sup-port of ARCGIS10.1,spatial-temporal variability of groundwater has been explored for 7 years by using geological statistics. It also used ordi- naiy kriging interpolation to draw,spatial distribution maps of 2007 and 2013 respectively and used projection transformation to calculate the control area of groundwater which was analyzed with spatial distribution maps. The results show that the index predicted by index theory model of semi-variance totally indicates the spatial structure and spatial-temporal variability of groundwater in Turpan Basin; there is a middle mod-erate intensity of spatial correlation in 2007, while a high intensity of spatial correlation in 2013; there is an apparent variation tendency from east to west in space in terms of the depth control area of groundwater in Turpan Basin ; overall, there is a downtrend of the groundwater depth in Turpan Basin,which is mainly effected by natural environment factors and human factors.