关键词: 泥石流；地质灾害；排导渠, 拦渣坝

Abstract: Fujian is located at southeast coastal area of China with majority of the rolling hill topography throughout the entire province. In the mountains of the northwest part of the province, geohazards, such as, shallow rock collapse and landslides, are frequently encountered. Triggered by heavy precipitations within a short period, the colluvium is accumulated at the bottom of the valley and forms mud flow slides that containing large quantity of soils and rock blocks. These potential mud flows are in the widely distributed mud source area with short passing zone or without passing zone and usually have the characteristics of potentially affecting a large damage area and with significant potential damage. The mud flow mitigation design should be based on the development of the mud flow mechanism and topographic characters of the mud flows. The engineering mitigation measures include reinforcing the source zone, blocking the passing through zone or placing energy dissipation steps and installing discharging channels in the accumulation zone. The best design should consider the sitespecific conditions and select the most effective available solutions.

Key words: mudflow, geological hazards, discharge channels, check dams