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云南省丽江永胜县大安乡是泥石流高发带,区内山高坡陡,坡度一般在35°~55°。地貌类型主要为山区剥蚀地貌,分布于整个流域,地形以斜坡为主,主沟两岸主要为耕地,塌岸侵蚀较为强烈,水土流失严重。区内降水充沛,年均降水高达967mm。雨季日降水量较大及单点暴雨多见等降水特征以及构造运动易诱发区内潜在滑坡、崩塌点发生。本文通过对研究区可能参与泥石流运动的潜在物源量进行了计算,对区内可能发生的泥石流进行评价并提出预防、治理措施。
Tai’an Township, Yongsheng County, Lijiang, Yunnan Province is a high debris flow belt with high and steep slopes. The slope is generally between 35 ° and 55 °. The main types of landforms are mountainous denuded landforms distributed throughout the river basin. The terrain is mainly slope. The main banks of the main trench are cultivated land, and the bankruptcy erosion is more intense with serious soil erosion. Precipitation in the area is plentiful, with an average annual rainfall of up to 967mm. Rainy days, large precipitation and single rainstorm and other precipitation characteristics and the tectonic movement easily induced potential landslides, collapse occurred. Based on the calculation of the potential sources of debris flow that may be involved in the study area, this paper evaluates the potential debris flow in the area and puts forward prevention and treatment measures.