流域分区
River
分类河长占评价河长百分比(%) Classify River length of Evaluate Length (%)
评价河长
(千米)
Evaluate
Ⅰ类
Ⅱ类
Ⅲ类
Ⅳ类
Ⅴ类
劣Ⅴ类
Length
GradeⅠ
GradeⅡ
Grade Ⅲ
Grade Ⅳ
Grade Ⅴ
Worse
(km)
than
GradeⅤ