摘要
经综合研究,结合GIS数据分析,对崇州市地质灾害特点和发育规律进行了分析和总结。结果表明:滑坡规模以小型为主,均为土质滑坡、新滑坡,以浅层滑坡为主;滑坡集中分布于地形坡度15°~25°、高程560~800m、半坚硬砂泥岩岩组(N、E、K_(2g))、半坚硬—坚硬岩组(J_(3p)、J_(2sn)、J_(2s)、J_(1-2z))内;崩塌集中分布于45°以上的坡度、高程800~1200m、薄层状半坚硬砂页岩岩组、中厚层中等岩溶化坚硬石灰岩岩组及厚层半坚硬砂泥岩岩组内;泥石流集中分布于地形坡度多介于10°~35°之间、高程在800~1200m之间。断层是崩塌、泥石流发育的主控因素,在0.5km范围内,崩塌达39处,密度为18.79处/100km^(2);泥石流达17处,密度为8.1/100km^(2)。
This paper has a discussion on characteristics and development regularity of geohazards in Chongzhou,Chengdu based on comprehensive study and GIS data.The study indicates that most of landslides in Chongzhou are new shallow soil landslide and small on scale and are developed in semi-hard sandstone mudstone(N,E,K_(2g))and hard and semi-hard rock(J_(3p),J_(2sn),J_(2s),J_(1-2z))with slope of 15°~25°and elevation of 560~800m.Most of avalanches are developed in thin-bedded semi-hard sandstone shale formation,medium-thick bedded hard limestone and thick bedded semi-hard sand mudstone with slope of more than 45°and elevation of 800~1200 m.Most of debris flows are developed in the section with slope of 10°~35°and elevation of 800~1200 m.The avalanche and debris flow are controlled by fault.There are 38 avalanches and 17 debris flows within a 0.5 km^(2) range,with density of 18.79/100 km^(2) and 8.1/100 km^(2),respectively.
作者
王若飞
鄢发斌
张铁硬
武荣华
WANG Ruo-fei;YAN Fa-bin;ZHANG Tie-ying;WU Rong-hua(Regional Geological Surveying Team,BGEEMRSP,Chengdu 610213)
出处
《四川地质学报》
2021年第S01期113-121,共9页
Acta Geologica Sichuan
关键词
崇州
地质灾害
分布规律
GIS分析
geohazard
distribution regularity
GIS
Chongzhou,Chengdu
