The 5.12 Wenchuan M 8.0 Earthquake caused great damage and economic losses to the reservoirs of Luojiang county in Deyang city.However

it would have made a greater loss

if the dam failure had been caused.Based on the studies on the earthquake damage to 19 high-risk reservoirs in Luojiang county

it is found that the typical damage mainly includes fracture

seepage

wave screen damage

as well as injuries of discharge structures and subsidiary facilities.According to the previous defect investigation on the earth dam of reservoir

it could be seen that the reservoirs ran in defective state before earthquake. The main factors influencing the operation of the reservoir during earthquake are poor qualities of the earth materials and earth filling

dam foundation problem

unreasonable design of dam body

ant damage

and the lack of earthquake instrumentation and so on.Based on the post-earthquake destruction pattern of earth dam of reservoir

the influence of the pre-earthquake defect on the damage is analyzed

which could provide basic data for seismic design of dam in the future.