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长江上游资源丰富，人口众多，生态环境脆弱，泥石流活动强烈，为了长江上游的资源开发和经济建设，开展了泥石流危险度的区划工作。区划采用综合研究与重点研究相结合，区域总体研究与典型区研究相结合，因素分析与相关分析相结合，间接自然指标与直接自然指标相结合，以及自然危险度与经济发展程度相结合的方法，将长江上游划分为五级泥石流危险程度不同的类型区。
The upper reaches of the Yangtze River is rich in resources, has a large population, fragile ecological environment and strong debris flow activities. Zoning for the risk of debris flow is carried out for resource development and economic construction in the upper reaches of the Yangtze River. The division adopts a combination of comprehensive study and key research, a combination of regional overall study and typical district study, a combination of factor analysis and correlation analysis, a combination of indirect natural indicators and direct natural indicators, and a combination of natural hazard and economic development , The upper reaches of the Yangtze River is divided into five types of debris flow hazard areas of different types.