基于地统计的额济纳绿洲地下水位埋深空间异质性研究

The spatial heterogeneity of groundwater level depth in Ejina oasis based on Geostatistics

利用地统计学方法定量研究了额济纳绿洲地下水位埋深的空间异质性。结果表明:额济纳绿洲地下水位埋深分布有较大的空间异质性,地下水位埋深的理论模型为球体模型;额济纳绿洲地下水位埋深主要受结构性因子的影响;地下水位埋深的变程在22.6km左右。地下水位埋深的空间分布总体上表现为从南到北,从西向东逐渐增大的分布格局。局部分布上,在垂直河流方向地下水埋深呈两头深中间浅的"V"型结构,在平行河流方向地下水埋深呈逐渐变深的递增趋势。

Spatial heterogeneities of groundwater level depth was studied with the combination of methods of geo-statistics and spatial analysis function of GIS in the Ejina oasis.Results showed that groundwater level depth had the significant spatial heterogeneity.The spatial variation in groundwater level depth was best fitted by spherical model.Groundwater level depth was greatly affected by structure factors.The variation range of groundwater level depth was about 22.6 km.The spatial distribution pattern of groundwater level depth was general manifested as increases gradually from south to north,from west to east.In partial distribution,groundwater level depth in the vertical direction showed ＂V＂ type structure,groundwater level depth in horizontal direction presented a gradually increasing trend.