西北工程技术学报2026，Vol.25Issue(2)：159-167,9.DOI:10.26974/j.cnki.XBGC.2026.02.008
宁夏贺兰山贺兰沟"8·21"泥石流运动分析与易发性评价
Analysis of the 8·21 Debris Flow and Susceptibility Assessment of Helan Valley in Helan Mountains,Ningxia
杨有贞 1马逸舒 1邓检良 2张驰 1李学军 3左娜 3马韵琪 3刘葳4
作者信息
- 1. 宁夏大学 土木与水利工程学院,宁夏 银川 750021
- 2. 上海交通大学 船舶海洋与建筑工程学院,上海 200240
- 3. 贺兰山岩画管理处,宁夏 银川 750200
- 4. 宁夏大学 数理统计学院,宁夏 银川 750021
- 折叠
摘要
Abstract
On August 21,2016,a debris flow disaster occurred in Helan Valley,Helan Mountain,Ningxia.Therefore,based on DEM elevation and high-precision images,an ArcGis computational model was established to obtain parameters such as bulk density,flow velocity,flow rate,and total volume of the debris flow process in Helan Valley.The Massflow software was used to simulate the movement characteristics of the debris flow in Helan Valley and analyze the variations in sediment depth and flow velocity.By combining the topography,material sources,and water sources,the susceptibility characteristics of the debris flow were evaluated.The results showed that the 8·21 debris flow in Helan Valley was a rare debris flow triggered by short-duration heavy rainfall,with flow velocities primarily below 6 m/s.The sparse vegetation in Helan Valley resulted in minimal resistance,leading to higher flow velocities;the average sediment depth ranged from 1 to 6 m,with a maximum sediment depth exceeding 10 m.The sediment depth was greatest in the middle of the valley and gradually decreased along the sides of the valley;the total volume of a single debris flow event was 4.81×105 m3,indicating a moderate susceptibility to debris flows.关键词
贺兰沟/泥石流/Massflow/成灾特征/易发性Key words
Helan Valley/debris flow/Massflow/disaster characteristics/susceptibility分类
天文与地球科学引用本文复制引用
杨有贞,马逸舒,邓检良,张驰,李学军,左娜,马韵琪,刘葳..宁夏贺兰山贺兰沟"8·21"泥石流运动分析与易发性评价[J].西北工程技术学报,2026,25(2):159-167,9.
