Distribution of the geological hazards in the upper reaches of the Minjiang River, Sichuan

The existing 284 sites of geological hazards are developed in the lower, intermediate and higher mountain areas in the upper reaches of the Minjiang River, Sichuan, with a density of 7.3/100 km², 2.3/100 km² and 0.64/100 km², respectively, and making respectively up 6.7%, 70.7% and 20.8% of the total numbers of the geological hazards throughout the study area. The stratal lithology and slope architectures are considered as important controlling factors, and earth quakes and precipitations as major triggers for the geological hazards in the study area. The statistical analysis of the geological hazards may provide the useful approach to the sustainable economic development and the planning of precaution and reduce of geological hazards along the Minjiang River.