科学分类是泥石流研究的重要内容, 也是科学认识泥石流这一自然现象的重要基础。地貌位置或流域形态是 目前泥石流类型划分的重要依据之一, 在泥石流按地貌特征、流域形态类型分类研究现状分析的基础上, 讨论了目 前基于地貌特征的泥石流分类方案在泥石流识别方面存在的差异, 包括坡面型泥石流的定性识别方法、坡面型泥石 流与沟谷型泥石流的判定指标以及形成机理等; 进而从科学性和实践性出发, 提出可结合斜坡地貌与沟谷侵蚀演化 过程, 将泥石流划分为坡面型泥石流、冲沟型泥石流和沟谷型泥石流的划分方案。

Scient ific classificat ion is o ne of the impor tant r esear ch contents on debr is f low and also cr ucial fo r the scientific under2 standing of debris flow phenomeno n. Geomo rpholog ical lo cation or water shed mo rpholog y is one o f the im po rtant bases t o clas2 sify debr is flow . Accor ding t o the analysis of debr is flow classificatio n based on the g eomo rpho lo gical char acter istics and water2 shed mo rpholo gy , the differences in the identificatio n of debris flow using differ ent classificat ion schemes wer e discussed, inclu2 ding the qualitative identificatio n metho d of slope2type debris flow , and evaluatio n index es and formatio n mechanism o f slope2 type and gully2type debr is flow s. In this paper , based on the slope g eomor pho log y and gully ero sion pro cess, debris flow was fur2 ther classified int o three ty pes scientifically and pr act ically, including the slope2type debris flow, g ro ov e2t ype debr is flow, and gully2t ype debris flow .

国家自然科学基金项目( 41102226) ; 科技基础性工作专项( 2011FY1101002 1)