Due to complex geological

geomorphic

and hydro-meteorological conditions

numerous geo-hazards occur in Huili County. The "8?30" earthquake induced a large number of new geo-hazards

as well as the intensification of old hazards in Huili County. With the help of sending geo-hazard census list

remote sensing

and expert inquiry

55 new geo-hazards triggered by the "8?30" earthquake are identified

including 8 rock-falls

25 landslides

2 debris-flows

and 20 unstable slopes

which are mostly in the south of the county

particularly in the region of Chinsha River. Based on the results from survey

the zoning on susceptibility level of geological disasters in Huili County is made in a unit grid of 2 km×2 km. The areas of high-susceptibility

mid-susceptibility

and low-susceptibility occupy 42.4%

37.1%

and 20.5% of the total area of the county

respectively. Additionally

some countermeasures are proposed

including setting a network of disaster prevention and mitigation

making the emergency treatment of some sudden hazards or the comprehensive treatment of important geological hazards

and enhancing the preventive management of geo-environmental disasters.