| 1. | Based on the data of the depth to groundwater table below land surface with observational wells in 1975 , 1980 , 1985 , 1990 , 1995 , 2000 of the hebei plain , adopting gis technic and kriging interpolation method , this paper analyzes the spatio - temporal change of groundwater level in the past 25 years in hebei plain 根据1975 1980 1985 1990 1995 2000年的地下水位观测资料,利用gis技术,采用kriging插值方法,分析了近25年来河北平原地下水位的动态变化过程,揭示了地下水位的时空演变规律,并探讨了地下水位下降的原因。 |