南水北调中线核心水源区土壤氟空间变异特征与污染风险评价
谭力, 王占岐, 薛志斌, 杨斌

Spatial variability and pollution risk assessment of soil fluorine in the core area of the Middle Route of the South-to-North Water Transfer Project
TAN Li, WANG Zhanqi, XUE Zhibin, YANG Bin
图7 以单因子指数表示的表层土壤氟污染空间分布
Figure 7 Spatial distribution of pollution degree of single factor index of topsoil fluorine