甘肃省金塔县中丰沟泥石流形成条件分析及流体特征研究  

Analysis of formation conditions and fluid characteristics of debris flow in Zhongfenggou,Jinta County,Gansu Province

作　　者：冯丽娟 薛文灏 简鹏 FENG Lijuan;XUE Wenhao;JIAN Peng(The Second Geology and Mineral Exploration Institute of Gansu Provincial Bureau of Geology and Mineral Exploration and Development,Lanzhou 730020,Gansu,China;Gansu Hydrological and Engineering Geology Investigation Institute Co.,Ltd.,Lanzhou 730020,Gansu,China;Tianshui Mineral Exploration Institute,Gansu Bureau of Non-Ferrous Geology,Tianshui 741020,Gansu,China)

机构地区：[1]甘肃省地质矿产勘查开发局第二地质矿产勘查院,甘肃兰州730020 [2]甘肃水文地质工程地质勘察院有限责任公司,甘肃兰州730020 [3]甘肃省有色地勘局天水矿产勘查院,甘肃天水741020

出　　处：《资源信息与工程》2024年第1期18-21,共4页Resource Information and Engineering

摘　　要：研究区位于甘肃省金塔县航天镇中丰沟流域,流域面积和沟谷纵比降较大,物源补给充足,在暴雨等极端天气下,极易形成暴雨型泥石流。该泥石流流域面积23.8 km^(2),物源补给方式中的滑坡和崩塌占总补给储量的2.73%;坡面冲蚀、切蚀、坍塌形成的松散堆积物占总补给储量的85.82%;沟道堆积物占总补给储量的11.45%。该泥石流的主要危害区域是沟谷下游至堆积扇前缘,危害方式以淤埋和冲毁为主。根据泥石流的形成、发育特点,拟采用“以排为主,辅以沟道加固、局部沟道清淤”的方案进行治理。The study area is located in Zhongfenggou Watershed of Hangtian Town,Jinta County,Gansu Province.The basin area is large,the longitudinal gradient of gullies is large,and the provenance supply is sufficient.In the case of rainstorm and extreme weather,it is easy to form rainstorm debris flow.The debris flow basin covers an area of 23.8 km^(2),and the provenance replenishment methods include landslide and collapse replenishment,accounting for 2.73%of the total replenishment reserves.The loose deposits from erosion and collapses of the slope accounted for 85.82%of the total reserves.Gully deposit replenishment accounts for 11.45%of total replenishment reserves.The main damage area of the debris flow is from the lower reaches of the gully to the front of the accumulation fan.According to the formation and development characteristics of debris flow,it is proposed to adopt the scheme of"drainage is the main,supplemented by ditch reinforcement and local ditch dredging"as the treatment.

关 键 词：金塔县 中丰沟 泥石流 形成条件 

分 类 号：P642.2[天文地球—工程地质学]