天水地区罗峪沟泥石流基本特征

The Basic Characteristics of Debris Flow in Luoyugou of Tianshui Area

天水市秦州区北部的罗峪沟是泥石流易发地区,该泥石流固体物质的来源主要是滑坡。流通区的堆积物以中粒为主,分选中等,偏度为极正偏。暴雨是诱发灾害的关键因素,主要发生在每年7—9月。该泥石流灾害治理应采用水土保持、谷坊建设、淤地坝、拦挡工程、排洪渠、加强监控管理、加强灾害宣传教育等措施。

Luoyugou in the north of Qinzhou District in Tianshui City is debris flow prone area and the solid matter mainly comes from landslide.The deposits in flowing area are medium grain and the skewnesses are positive.Rainstorm is the key factor of disaster, which mainly occurs between July and September every year.Some measures, including conservation of water and soil, construction of check dam, warp land dam and floodway, strengthening monitoring management and disaster education, should be used for debris flow control.