基于光美大箐泥石流潜在物源特征研究

STUDY ON THE POTENTIAL SOURCE CHARACTERISTICS OF GUANGMEI DAQING DEBRIS FLOW

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。

In Yongsheng County in Lijiang City, Yunnan Province, debris flow occurred extremely frequently and the zone characterized by high mountains with steep slope and the slope generally ranges between 35° and 55°. The main types of landforms are eroded landforms in the mountains that were distributed in the whole basin, and the terrain is mainly shown as slope. On both sides of the main channel are mainly cultivated land and bank ero- sion is relatively intense, accompanied by serious soil erosion. The area is abundant in rainfall, with an average annual rainfall of 967 mm. The precipitation characteristics such as large daily precipitation in the rainy season and common single point of rain, and the tectonic movement are prone to induce potential landslide and collapse point. In this paper, the potential sources of debris flow that may involve the movement in the study area are calculated. Combined with the evaluation of potential debris flows in the area, we put forward preventive and control measures.