摘要
选取敦煌盆地东湖保护区稀少地下水控制点区域为研究区,以潜水埋深数据为例,利用克里金、反距离加权法和径向基函数法等3种插值方法获取地下水潜水埋深栅格图像,并通过交叉验证和拟合分析对插值结果进行比较,分析总结3种插值方法在缺少足够控制点区域获取插值图像的适用特点及差异性,结果认为:在干旱半干旱地区艰苦环境下,利用取之不易的少量地下水控制点通过克里格插值方法模拟区域地下水位埋深结果是可靠的,同时对于空间相关性较强的类似空间变量,利用克里格插值可以较好地获取区域变量空间分布趋势。
The buried depth of groundwater table of Dunhuang Basin was selected as an example, using Kriging, Inverse Distance Weighting（IDW） and Radial Basis Function（RBF）, and through cross validation and fitting analysis on interpolation results to compare and summarize the three kinds of interpolation method and acquire interpolation image characteristics and differences. It shows that in arid and semi-arid regions difficult circumstances, using a small amount of groundwater by kriging to simulate regional groundwater depth and the results are reliable, while for similar strong spatial correlation variables, the use of kriging interpolation can get a better spatial distribution trends.
出处
《甘肃地质》
2017年第4期77-81,共5页
Gansu Geology
基金
中国地质调查局"东北边境地区基础地质遥感解译(No.12120115063201)"
关键词
地下水
稀少控制点
空间插值
东湖
敦煌
groundwater
scarce control points
spatial interpolation
the East Lake
Dunhuang Basin
