风险等级 Risk level

风险指数范围 Risk Index Range

面积 Area km²

占比 Proportion%

低风险区I Low risk area I

≤12

16.4078

5%

中低风险区II Medium and low risk area II

≤13

62.2180

19%

中风险区III Medium risk area III

≤14

133.0773

41%

中高风险区IV Medium and high risk area IV

≤15

99.0541

30%

高风险区V High risk area V

≤20

15.4394

5%