三江平原湿地区域生态风险评价研究
王辉, 宋长春
Regional ecological risk assessment of wetlands in the Sanjiang Plain
Hui WANG, Changchun SONG
表1
环境脆弱性指标分级标准
Tab.1
Index system of eco-environmental vulnerability assessment
因子
等级赋值
权重
1
2
3
4
坡度/(°)
<2.6541
2.6541~7.1207
7.1207~12.6363
>12.6363
0.3
植被覆盖/%
>85.20
85.20~73.20
73.20~35.60
<35.60
0.3
干燥度
<0.844
0.844~0.928
0.928~0.989
>0.989
0.2
土壤可蚀性(
K
值)
<0.2648
0.2648~0.3235
0.3235~0.3823
>0.3823
0.2
修正：生态脆弱区(是,否)
是=1, 否=0