China Mudflow Disaster Online Map.

Risk Zoning of Debris Flow Disasters

I The Great Dangerous Debris Flow Area in the Southwest Indian Ocean Basin

1A Nujiang River Most Dangerous Zone

2B Yarlung Zangbo River Medium Risk Zone

II Most Dangerous Debris Flow Areas in the Southeast Pacific Basin

3A Most Dangerous Areas of Jinsha River and Lancang River

4A Minjiang River Most Dangerous Zone

5A Most Dangerous Area of Jialing River

6A Most Dangerous Zone of Yalong River

7B Middle Dangerous Zone of Yangtze River

8C Pearl River Dangerous Area

III Dangerous Debris Flow Region in Northeast Pacific Basin

9B Jinghe and Luohe Medium Dangerous Areas

10B Middle Dangerous Zone in the Upper Reaches of the Yellow River

11A Most Dangerous Zone in the Middle Reaches of the Yellow River

12B Yellow River, Huaihe River and Haihe River Medium Risk Zone

13C Dangerous Zone of Songhua River and Liaohe River

IV Inland Flow and Arctic Basin Areas of General or Non-hazardous Debris Flow

14D Inland Flow Weak or Hazardous Areas in Xinhai, Tibet and Inner Mongolia

Weak Dangerous Zone of 15D Ertiz River

Subregional risk classification

A Most dangerous

B Medium dangerous

C More dangerous.