Discharge evolution law of debris flow based on a sharp bend physical modeling test  

作　　者：LU Ming SUN Hao LIU Jinfeng Abrar HUSSAIN SHANG Yuqi FU Hang 

机构地区：[1]Key Laboratory of Mountain Hazards and Earth Surface Process,Chinese Academy of Sciences,Chengdu 610041,China [2]Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,Chengdu 610041,China [3]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Journal of Mountain Science》2024年第6期1904-1915,共12页山地科学学报（英文）

基　　金：funded by the National Natural Science Foundation of China(Grant No.42201095);the Second Tibetan Plateau Scientific Expedition and Research(STEP)Program(Grant No.2019QZKK0902);the Postdoctoral Special Funding Project of Sichuan Province(Funding No.TB2023028).

摘　　要：For the basins with debris flow development,its channel terrain exhibits a tortuous shape,which significantly restricts the movement of debris flows and leads to severe erosion effects on the concave bank.Therefore,this study aims to analyze the shear force of debris flows within the bend channel.We established the relationship between the shear force and bend curvature through laboratory experiments.Under the long-term erosion by debris flows,the curvature radius of bends gradually increases,however,when this increasing trend reaches an equilibrium state with the intensity of debris flow discharge,there will be no significant change in curvature radius.In general,the activity pattern and discharges of debris flows would remain relatively stable.Hence,we can infer the magnitude of debris flow discharges from the terrain parameters of the bend channel.

关 键 词：Debris flow discharge Erosion effect Bend channel Curvature radius 

分 类 号：P642.23[天文地球—工程地质学]