摘要
Xinqiao Gully is located in the area of the 2008 Wenchuan M_(s)8.0 earthquake in Sichuan province,China.Based on the investigation of the 2023"6-26"Xinqiao Gully debris flow event,this study assessed the effectiveness of the debris flow control project and evaluated the debris flow hazards.Through field investigation and numerical simulation methods,the indicators of flow intensity reduction rate and storage capacity fullness were proposed to quantify the effectiveness of the engineering measures in the debris flow event.The simulation results show that the debris flow control project reduced the flow intensity by41.05%to 64.61%.The storage capacity of the dam decreases gradually from upstream to the mouth of the gully,thus effectively intercepting and controlling the debris flow.By evaluating the debris flow of different recurrence intervals,further measures are recommended for managing debris flow events.
基金
supported by the project of the China Geological Survey(No.DD20221746)
the National Natural Science Foundation of China(Grant Nos.41101086)。
作者简介
First author:Chang Yang,E-mail address:yangchang21@mails.ucas.ac.cn;Corresponding author:Yong-bo Tie,E-mail address:tyongbo@mail.cgs.gov.cn。
