摘要
汶川地震分布着大量的泥石流沟,在强降雨条件下诱发了大量的泥石流。通过野外调查和遥感解译发现,震区泥石流沟形成区的平均坡度为35.9°,平均形状系数值为0.26,强震区泥石流纵比降与泥石流沟的面积呈负相关。在此基础上,初步定义强震区急陡沟道泥石流为平均纵比降为400‰的沟道泥石流。为震区泥石流类型的认识提供参考。
A large number of debris flow gullies are distributed by heavy precipitation conditions after Wenchuan earthquake.It is found based on field investigation and remote sensing interpretation that the average grade of formation area of debris flow gullies in studied area is 35.9°,and the average shape coefficient value was 0.26.There is a negative correlation between the longitudinal gradient and the drainage area of debris flow gullies.On the basis,the average longitudinal slope of 400‰of channeled debris flows has been preliminary defined as urgent steep-channel debris flows.It provides reference and research direction for the understanding of debris flow types in earthquake area.
作者
屈永平
肖进
QU Yong-ping(Sichuan College of Architectural Technology,Deyang Sichuan 618000,China)
出处
《长春工程学院学报（自然科学版）》
2018年第4期57-61,共5页
Journal of Changchun Institute of Technology：Natural Sciences Edition
基金
四川省教育厅重点项目(18ZA0326)
关键词
汶川
流域面积
沟道纵比降
形状系数
急陡沟道泥石流
Wenchuan
watershed area
vertical drop of channel
shape coefficient
urgent steep-channel debris flows
