灾害学2025，Vol.40Issue(2)：198-204,7.DOI:10.3969/j.issn.1000-811X.2025.02.030
雅江县土窝沟火后泥石流物源动储量预测与灾变过程研究
Prediction of Post-Fire Debris Flow Source Storage and Dynamic Processes in the Slope Erosion of Tuwogou,Yajiang County
摘要
Abstract
Based on the post-fire debris flow in Tuwogou,Yajiang County,Sichuan Province,and by utilizing the Xichang burn scar empirical model,slope erosion depth and dynamic source storage in the Tuwogou watershed under different rainfall intensities are predicted.By integrating terrain conditions,dynamic source storage,and rainfall fre-quencies of 20%,5%,2%,and 1%,dynamic evolution simulations are conducted based on the OpenLISEM model.The results show that under rainfall frequencies of 20%,5%,2%,and 1%,the maximum slope erosion depths in the Tuwogou watershed are 9.89 mm,10.69 mm,11.09 mm,and 11.38 mm,respectively,with corresponding dy-namic source storage amounts of 3.41,3.83,3.98,and 4.08×104m3.The results indicate that under rainfall fre-quencies of 20%,5%,2%,and 1%,the maximum flow velocities are 2.5,4,5,and 6 m/s,and the maximum deposition depths are 1.5,2.7,3.5,and 4.4 m,respectively.Under rainfall frequencies of 2%and 1%,debris flows carry a large amount of solid material,and some of the material rushes out of the gully and participates in river evo-lution,which can raise the riverbed and create a semi-blocked state in the Yalong River.关键词
火后泥石流/坡面侵蚀/物源动储量/OpenLISEM/灾变过程/雅江县土窝沟Key words
post-fire debris flow/slope erosion/material dynamic storage/OpenLISEM/catastrophic process/Yajiang County Tuvogou分类
环境科学引用本文复制引用
周康驰,常鸣,张宁,尹道龙,李林泽..雅江县土窝沟火后泥石流物源动储量预测与灾变过程研究[J].灾害学,2025,40(2):198-204,7.基金项目
国家自然科学基金"强震区泥石流服役拦砂坝损伤机制与减灾效果评价方法研究"(42477173) （42477173）
四川省自然科学基金"泥石流松散物源侵蚀起动与输移演进研究"(2024NSFSC0071) （2024NSFSC0071）
四川省中央引导地方科技发展专项项目"消防管效应"下强震区泥石流动力侵蚀演进过程研究"(2024ZYD0121) （2024ZYD0121）
