城市地质2025，Vol.20Issue(2)：212-220,9.DOI:10.3969/j.issn.2097-3764.2025.02.009
弃渣对沟谷型泥石流易发性的影响分析
Analysis of influence of waste slag on debris flow susceptibility in a gully:Take Baiyangcheng Gully in Changping as an example
摘要
Abstract
Human engineering activities in mountainous areas discard a large amount of wastes,which can change the surface morphology of the gullies and increase the amount of loose material,thus affecting the drainage capacity of the gullies and increasing the likelihood of landslides and mudflows.During construction of the Tizhiyu Tunnel of the Jingli Expressway,a huge amount of tunnel waste was deposited along the bottom of the Baiyangcheng Gully in the middle and lower reaches.By remote sensing and on-site investigation,this study finds that the wastes changed the slope and gully morphology of the Baiyangcheng Gully in the middle and lower reaches,and affected the drainage capacity of the gully.Evaluation of the susceptibility of mudflow gullies shows that the wastes significantly increased the susceptibility of the Baiyangcheng Gully to mudflows.Joint analysis of the professional monitoring data of rainfall and mud-water level in the gully during"23·7"rainstorm finds that the cumulative rainfall curve of the process is complexly correlated with the mud-water level curve.Based on the changes in the gully erosion before and after the rainfall,the critical rainfall conditions for the occurrence of mountain torrents and debris flows in this gully this time are a continuous rainfall duration of 48 hours,a total rainfall of 394.6 mm,an average rainfall intensity of 8.22 mm·h-1,and a maximum rainfall intensity of 55.8 mm·h-1 during this period.关键词
泥石流/弃渣/易发性/"23·7"特大暴雨Key words
debris flow/waste slag/susceptibility/"23·7"extremely heavy rainfall引用本文复制引用
全瑶,吴彬,丁桂伶..弃渣对沟谷型泥石流易发性的影响分析[J].城市地质,2025,20(2):212-220,9.基金项目
京津冀协同发展交通网络地质安全监测预警系统项目(BJJQ-2020-197-02)资助 （BJJQ-2020-197-02）
