干旱区研究2025，Vol.42Issue(9)：1660-1670,11.DOI:10.13866/j.azr.2025.09.10
雅鲁藏布江中下游宽谷风蚀区风沙运移
Characteristics of wind-sand transport in wide valley wind erosion area in the middle and lower reaches of the Yarlung Zangbo River
摘要
Abstract
The wide valley wind erosion area in the middle and lower reaches of the Yarlung Zangbo River is one of the areas with the most frequent wind-sand activities in the Qinghai-Xizang Plateau.Therefore,it is of great significance to study the sand emission law of different underlying surface in this area during the wind-sand sea-son for windbreak and sand fixation and sustainable development of the ecological environment.In this study,four typical underlying surfaces in the Linzhi section of the middle and lower reaches of the Yarlung Zangbo Riv-er Basin were identified.The characteristics of wind-sand transport on different underlying surfaces were system-atically revealed through simultaneous observation of the gradient anemometer and multichannel sand sampler.The main findings are summarized as follows.(1)Affected by the surface vegetation,the near-surface wind speed profile conforms to the logarithmic function;however,the parameters are significantly different.(2)The sediment particle size is spatially differentiated.The proportion of silt in the mobile sand land of the river beach(37.93％)was significantly higher than that of the other underlying surfaces,whereas the riparian sand land was dominated by fine-medium sand(83.49％).(3)The sand transport process has significant underlying surface dependence,and the wind-sand flow structure conforms to the exponential-power function composite model.(4)The order of sand transport per unit area in the wind-sand season is riparian sandy land(96.16t·d-1)＞footh ill sandy land(77.65 t·d-1)＞beach sandy land(69.87t·d-1)＞sparse forest land(5.23 t·d-1).关键词
雅鲁藏布江/风速廓线/风沙流结构/输沙通量Key words
Yarlung Zangbo River/wind speed profile/wind-sand flow structure/sediment discharge引用本文复制引用
刘昊,宫航,丁国栋..雅鲁藏布江中下游宽谷风蚀区风沙运移[J].干旱区研究,2025,42(9):1660-1670,11.基金项目
内蒙古自治区"揭榜挂帅"项目(2024JBGS0013) （2024JBGS0013）
