CAJ | 학술논문

以长江上游陇南地区405条泥石流沟为例,经统计分析,得出沟道汇水面积为2~15 km2、沟道比降为5%~35%、沟长度为1~15 km的沟道最容易发生泥石流。同时泥石流沟的汇水面积、沟道比降和沟道长度均存在明显的分形特征,3个形态要素与沟道数目之间具有良好的非线性关系,其分形维数依次为1.124,1.489和1.239,分维的大小反映了不同形态要素对系统所起作用的差异。其结果对长江上游流域泥石流灾害的进一步研究与防治提供了新的思路。
이장강상유롱남지구405조니석류구위례,경통계분석,득출구도회수면적위2~15 km2、구도비강위5%~35%、구장도위1~15 km적구도최용역발생니석류。동시니석류구적회수면적、구도비강화구도장도균존재명현적분형특정,3개형태요소여구도수목지간구유량호적비선성관계,기분형유수의차위1.124,1.489화1.239,분유적대소반영료불동형태요소대계통소기작용적차이。기결과대장강상유류역니석류재해적진일보연구여방치제공료신적사로。
A statistical analysis is carried out for 405 debris flow gullies in Longnan area, upper Yangtze River, and it is re-vealed that the gullies with several characteristics are most likely to develop debris flow, especially for the gullies with a drainage area of 2~15 km2, gully gradient of 5% ~35% and main gully length of 1~15 km. Simultaneously, there is obvious fractal characteristics in the these morphological factors with fractal dimension of 1. 124, 1. 489 and 1. 239, all which have fine nonlin-ear correlation with the number of gullies. Different morphological factors play different roles in the gully system, which can be reflected by the amplitude of fractal dimension.