土地利用变化对地下水位空间分布的影响

为研究土地利用变化与地下水位的关系,基于吉林西部大安市不同时期的遥感影像,利用转移矩阵计算土地利用变化的转移量.结合大安市地下水监测井数据及地统计学,得到地下水位及土地利用类型空间分布图,并分析了地下水位的时空变异特性及土地利用变化对地下水位影响.结果表明:地下水位变化呈明显的空间分布特征,且人为因素对地下水位空间变化的影响比重增大;该区土地利用类型存在剧烈的时空转换,土地利用类型变化剧烈的地区均是地下水位急剧变化的区域,说明土地利用类型的变化和地下水位空间分布存在正相关性.

Impact of Land Use Changes on Spatial Distribution of Groundwater Level

In order to study the relationship between land use changes and groundwater level， based on the TM(thematic mapper) image of Da′an city in the west of Jilin province， the transformation matrix of the land use was calculated. By using the groundwater level data observed from monitoring wells and the knowledge of geostatistics， the relationship between the land use changes and the groundwater levels was analyzed. Results show that the changing of groundwater level takes on an obvious spatial characteristic and the influnence of human factors on the changing of groundwater level is gradually increased. The land use of Da′an city is dramatically changed in that if there is a rapid change of groundwater level， there is a rapid change of land use， which indicates there is a positive correlation between the land use and the spatial distribution of groundwater level.