摘要
2010年6月14—18日,福建省顺昌县发生连续强降雨事件,致使多处地区发生滑坡、泥石流等群发性地质灾害,宝庄村是重灾区之一。在群发性滑坡灾区,往往很容易导致沟谷泥石流地发生。为了探索泥石流发生与滑坡物源之间的关系,选择了宝庄村43个流域,通过卫星遥感解译获取滑坡面积和流域面积的数据集,进而分析浅层滑坡诱发沟谷型泥石流的物源临界值,提出了一个经验模型来分析群发性滑坡引起的沟谷型泥石流的触发条件。结果表明,所提出的模型适用于福建省浅层滑坡诱发的沟谷型泥石流的物源分析。经验模型简单,输入的数据是容易测量的流域面积(A)和滑坡划痕面积(A_(0))。因此,该方法可以用于分析其他地区浅层滑坡诱发的沟谷型泥石流。
Continuous heavy rainfall occurred in Shunchang County,Fujian Province,China,from June 14 to 18,2010,causing many landslide hazards.Among Shunchang County districts,Baozhuang Village is one of the hardest-hit areas and suffered severe losses.A detailed analysis of the relationship between the catchment area and the area of landslides was carried out to explore the relationship between debris flow occurring and the provenance provided by landslides.An empirical model was presented to analyze gully-type debris flows caused by hillslope debris flow everywhere.Forty-three catchments in the Baozhuang Village area were selected and investigated using Google Earth Pro satellite image to estimate the area of landslides in the catchment area.The thresholds for gully-type debris flow caused by shallow landslides were defined in terms of the area of the landslides(A_0) and the catchment(A).A_0-A threshold models were constructed for debris flow catchment in Baozhuang Village using the empirical data set of debris flow by shallow landslides.The validation suggests that the proposed models are suitable for analyzing the initiation mechanism of debris flow caused by shallow landslide(or hill slope debris flow) in Fujian Province.The empirical models are simple,and the data necessary for the input are easily measurable catchment and landslide scar areas in a catchment.Owing to its simplicity and low cost-benefit rate,the approach may be applied to analyzing gully-type debris flow caused by shallow landslides in other areas.
作者
陈文鸿
余斌
吴雨夫
郭朝旭
柳侃
叶龙珍
叶鹏
马煜
CHEN Wen-hong;YU Bin;WU Yu-fu;GUO Chao-xu;LIU Kan;YE Long-zhen;YE Peng;MA Yu(State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,China;Key Laboratory of Geohazard Prevention of Hill Mountain,Ministry of Natural Resources,Fuzhou 350002,China;Nanjiang Hydrogeological Engineering Geological Team,Chongqing Bureau of Geology and Mineral Resources Exploration and Development,Chongqing 401147,China;Jiangxi Mineral Resources Guarantee Service Center,Nanchang 330025,China)
出处
《科学技术与工程》
北大核心
2024年第26期11067-11073,共7页
Science Technology and Engineering
基金
国家自然科学基金(U21A2032)
福建省自然资源科技创新项目(KY-070000-04-2023-010)。
关键词
浅层滑坡
泥石流
统计模型
福建
shallow landslide
debris flow
statistical model
Fujian
