茂县城区后山龙洞沟泥石流形成条件及防治方法探讨  

FORMATION CONDITIONS AND CONTROL METHODS OF MUD FLOW IN LONGDONGGOU GULLY BEHIND MAOXIAN COUNTY TOWN

作　　者：罗永忠[1] 潘向东 郝红兵[1] 

机构地区：[1]四川省华地建设工程有限责任公司一○一分公司,四川广汉618300 [2]赤峰建筑勘察设计研究院,赤峰024000

出　　处：《地质灾害与环境保护》2001年第4期9-12,共4页Journal of Geological Hazards and Environment Preservation

摘　　要：茂县位于川西北地区 ,为我国羌族居住地。城区后山龙洞沟为老的泥石流沟 ,流域面积为14 .6 3km2 ,主沟长 9.9km,有三条支沟 ,主、支沟沟床比降大。流域内出露地层岩性为志留系茂县群灰色、灰绿色、黑色千枚岩 ,风化严重。近年来 ,由于对后山森林植被破坏 ,加之灌渠渗漏 ,致使龙洞沟两岸发生多处崩塌滑坡 ,在暴雨季节曾多次发生大规模泥石流。龙洞沟泥石流应视其形成特征 ,采取以拦挡、排导等工程措施为主 ,结合植树造林、预警预报。The longdonggou gully behind the county town of Maoxian is a mud flow gully, of which the watershed area is about 14.63 km2, and the main one of three branch valleys is 9.9 km long. The slope ratio of valleys' beds are rather high and rocks on slope are weathered seriously. In recent years the destruction of vegetation and water leakage from irrigation channels have caused rock falls and sliding on slopes in many places and in raining period the large scale debris flows happened for many times. It is necessary to take comprehensive measures to control the debris flows.

关 键 词：龙洞沟 泥石流 形成条件 防治方法 茂县 拦挡工程 植树造林 

分 类 号：P642.23[天文地球—工程地质学]