Debris flow has a wide distribution and frequent occurrence in reservoir of hydropower station

which is located in the Meigu River of Jinshajiang.The survey results show that there are 31 debris flow valleys with different types in the reservoir zone.Among them

4 debris flow valleys belong to high hazard level

and 15 moderate hazard level.The debris flow hazards have a great impact on the hydropower station during engineering construction period.The important parameters of debris flow with high activity

such as volume weight

designed velocity

designed discharge

potential depositional amount

are calculated for 12 debris flow valleys.Activity status and development trend of these debris flow are also further analyzed after the reservoir works.The study results indicate that debris flow hazards have great influence on reservoir construction.After the hydropower station begin to work

most debris flow hazards will reduce to acceptable level

which have no obvious impact on working order of the hydropower station.