GIS空间插值方法在湖泊水质评价中的应用效果比较研究

采用Kriging和径向基函数等2种GIS空间插值方法对梁子湖的水质污染现状进行分析研究,结果表明,梁子湖的大片水域水质都处于Ⅱ类和Ⅲ类,在湖泊的中部以及宁港附近的水域起水质可以达到Ⅱ类甚至Ⅰ类水质标准。通过对2种插值方法的应用效果进行比较,得出在研究区的空间尺度及采样规模下,Kriging具有较高的精度,其插值分析结果较为接近实地数据,可以作为梁子湖水质评价的主要空间插值方法。

Comparison of Application Effect of GIS Spatial Interpolation Method in Lake Water Quality Evaluation

The present water pollution situation of Liangzi Lake was analyzed ,using two kinds of GIS spatial interpolation method ,such as Kriging and radial basis function. The results showed that most of lake water quality was in class II and III ,and the water in middle of Liangzi Lake and nearby Ning Port reached class II and even class I standard. Through comparison of application effect of the two kinds of interpolation methods ,it′s concluded that under the spatial scale and sampling scale,Kriging had high precision,the interpolation analysis results were close to the field data,and it could be regarded as the main spatial interpolation method for water quality evaluation of Liangzi Lake.