CAJ | 학술논문

堆积层滑坡是库区常见的滑坡类型之一，而地形坡度是滑坡发育的重要内因，研究地形坡度与堆积层滑坡发生概率之间的关系对水库型堆积层滑坡的危险性评价具有重要意义。以三峡库区及丹江口库区的139处堆积层滑坡为例，首先，将滑坡地形坡度以每隔5°划分为一个区间，总共分为7个区间；在此基础上，采用贡献率方法，定量研究了地形坡度分别对滑坡数量、面积、体积的贡献率；最后，通过迭加统计，得到了不同坡度区间对滑坡发生的综合贡献率。结果表明，15°～25°的地形坡度对水库型堆积层滑坡的贡献率最高，10°～15°及25°～30°的地形坡度对水库型堆积层滑坡的贡献率中等，小于10°及大于30°的地形坡度对水库型堆积层滑坡的贡献率最小。研究结果可为具有类似地质背景的水库型堆积层滑坡危险性评估及防治规划提供参考依据。
퇴적층활파시고구상견적활파류형지일，이지형파도시활파발육적중요내인，연구지형파도여퇴적층활파발생개솔지간적관계대수고형퇴적층활파적위험성평개구유중요의의。이삼협고구급단강구고구적139처퇴적층활파위례，수선，장활파지형파도이매격5°화분위일개구간，총공분위7개구간；재차기출상，채용공헌솔방법，정량연구료지형파도분별대활파수량、면적、체적적공헌솔；최후，통과질가통계，득도료불동파도구간대활파발생적종합공헌솔。결과표명，15°～25°적지형파도대수고형퇴적층활파적공헌솔최고，10°～15°급25°～30°적지형파도대수고형퇴적층활파적공헌솔중등，소우10°급대우30°적지형파도대수고형퇴적층활파적공헌솔최소。연구결과가위구유유사지질배경적수고형퇴적층활파위험성평고급방치규화제공삼고의거。
Debris landslide is one of the most common types of landslides in reservoir region.Slope gradient is an important internal cause of the development of landslides.The relation between slope gradient and probability of occurrence of debris landslide in reservoir region has important significance to debris landslide risk assessment in reservoir region.This paper takes 1 39 debris landslides in the Three Gorges Reservoir region and Danjiangkou Reservoir region as example.Firstly,it divides the slope gradient into 7 intervals.Each adjoining 5°is an interval. Based on above,the influence that slope gradient contributes to landslide growth is quantitatively analyzed by contribution rate method.The results show that,the slope gradients of 1 5°~25°have the maximum contribution rate.The slope gradients of 1 0°~1 5°and 25°~30°have the intermediate contribution rate.The slope gradients greater than 30°and less than 1 0°have the minimal contribution rate.The results can provide potential gist to risk evaluation for debris landslide in reservoir region.