水文地质工程地质2025，Vol.52Issue(3)：186-196,11.DOI:10.16030/j.cnki.issn.1000-3665.202411008
拒马河上游极端降雨引发的地质灾害特征与链生演化过程
Characteristics and chain-generated processes of extreme rainfall-induced geohazards in the upper reaches of the Juma River
摘要
Abstract
From July 29 to August 2,2023,a historically rare extreme rainfall event occurred in North China,which triggered a large number of geohazards in the mountainous areas of western Beijing and Hebei,resulting in serious casualties and property losses.This study analyzed the characteristics of geohazards under the extreme rainfall of"23·7"in Beijing-Hebei region,using on-site investigation,UAV aerial photography,and numerical simulation methods.The analysis focused on the geohazard characteristics in the upper reaches of the Juma River,examining the formation and evolution process and movement characteristics of the geohazards chain in Xita village.The results show that the sudden geohazards in the Beijing-Hebei region exhibited a clustered pattern,with frequent shallow surface collapses and landslides,which often became the source of mudslides,forming of a complete disaster chain of shallow surface landslide-mudslide-river blockage-failure together.The geological disaster chain in the upper reaches of the river shows the characteristics of long chain evolution and multiple sources of material accumulation.The length of a single disaster chain can reach 1.2～1.5 km,with the sources of shallow avalanches and slides replenishing both in the formation area and circulation area of the disaster chain,amplifying the scale of the disaster.Numerical simulation results show that the movement speed of the geohazards chain in Xita Village reaches up to 9.1 m/s.The maximum accumulation thickness in the two ditches was 7.1 m and 6.2 m when activated individually,and 8.6 m in the case of simultaneous activation,with the movement process showing typical multi-source accretion and amplification.This study provides valuable insights for risk prevention and management of sudden geohazard chains under extreme rainfall in northern mountainous areas.关键词
极端降雨/地质灾害链/灾链体/放大效应/京冀西部山区Key words
extreme rainfall/geohazards chain/numerical simulation/amplification effect/Beijing-Hebei west mountain area分类
天文与地球科学引用本文复制引用
朱贺,张永双,任三绍,陶昶旭,刘明学..拒马河上游极端降雨引发的地质灾害特征与链生演化过程[J].水文地质工程地质,2025,52(3):186-196,11.基金项目
国家自然科学基金项目(42342055) （42342055）
河南省自然科学基金重点项目(252300421291) （252300421291）
