Wenchuan earthquake caused a variety of secondary mountainous hazards.Risk assessment regarding secondary hazards is therefore very important for reconstruction projects in the affected areas.Based on regional data analysis

assessments of dangerousness

vulnerability

and risk were carried out.A linear relationship was found between dangerousness degree and disaster density.Assessment results show that highly dangerous regions concentrated along Longmengshan fault

accounting for 39.8%of the total area.Regions of high and extremely high vulnerability mainly surrounded the cities of Chengdu

Mianyan

Deyang

and Ya'an

accounting for 13.1%of the total area.Regions of high risk

accounting for 11%of the total area

occupied the transitional zone between Longmeng Mountain and the piedmont plain

which had high dangerousness degree and high vulnerability

respectively.Special attention should be paid to the regions of high risk and vulnerability during the reconstruction.However

the regions of moderate should also be cared as the risk and vulnerability of these areas could be potentially deteriorated due to the rapid expansion of the reconstruction areas.