Abstract:

Based on RS interpretation and field surveying, both investigation and assessment on geological hazards in Yajiang city have been carried out. Four conclusions are drawn as follows. Seven geological hazards have been checked out in Yajiang city, including 1 debris flow, 3 landslides, 2 potential unstable slopes and 1 dangerous rockmass. The safety of residents from 83 families and operation of G318 national highway and Yajiang middle school are threatened by these geo-hazards. Stability assessment indicates that all geo-hazards are at unstable condition. Landslide and rock collapse consist of the main hazard source in Yajiang city. As far as the principle of geo-hazard prevention in Yajiang city, priority should be given to engineering control and professional monitoring measures. Finally, corresponding prevention suggestions were brought forward in detail for every geological hazard. The study can provide geological reference both for geo-hazard prevention and for the construction and development of Yajiang city.

Key words: geological hazard, characteristic, stability assessment, countermeasure, Yajiang city