水土保持通报2026，Vol.46Issue(2)：43-52,10.DOI:10.13961/j.cnki.stbctb.2026.02.017
黄河中游沙家湾小流域风沙环境特征及其入沟过程
Characteristics of wind-sand environment and gully entering process in Shajiawan small watershed in middle reaches of Yellow River
摘要
Abstract
[Objective]The amount of wind-blown sand entering gullies and its migration paths and deposition processes within the gully slopes in the coarse sand area in the middle reaches of the Yellow River were analyzed in order to provide a scientific basis for wind and sand prevention and control in the Yellow River basin.[Methods]Taking the Shajiawan small watershed as the study area,sand drift potential(DP)was calculated based on field monitoring and laboratory analysis using sand samplers,and the actual wind erosion potential(DPa)was derived by incorporating the rainfall inhibition effect.The wind-sand deposition amount in the gully was estimated using a function fitting method.Combined with the soil particle size characteristics of the gully slopes,the wind-sand transport paths and sedimentary characteristics were systematically analyzed.[Results]① The Shajiawan small watershed was characterized by a high wind energy environment.The annual sand drift potential was 441.95 VU,with a directional variability index of 0.42.The direction of the annual synthetic sand drift potential was perpendicular to the main channel,and the annual wind erosion modulus of the channel was-0.40 t/hm2.Sand drift potential and wind-sand deposition were highest in spring,accounting for 53.74％and 40.25％of the annual total,respectively.② The annual actual wind erosion potential(DPa)considering rainfall suppression was 293.04 VU,which was 27％lower than the sand drift potential.The suppression effect was most pronounced when high wind speeds occurred simultaneously with heavy rainfall.③ As the slope position decreased,the sediment composition changed from silt(76.20％)to predominantly fine sand(74.70％),with the average particle size changing from 5.52 φ to 2.89 φ.The soil particles became significantly coarser,and the movement mode changed from suspension to saltation.[Conclusion]The process of wind-blown sand entering gullies occurs under the combined effects of high wind energy and gully terrain obstruction,with sediments entering the gullies through saltation.关键词
输沙势/风蚀模数/风沙入沟/土壤粒径/多沙粗沙区Key words
sand drift potential/wind erosion modulus/wind-blown sand entering gullies/soil particle size/coarse sand area分类
天文与地球科学引用本文复制引用
郭志文,秦富仓,张铁钢,张晓明,郭乾坤,董菲菲..黄河中游沙家湾小流域风沙环境特征及其入沟过程[J].水土保持通报,2026,46(2):43-52,10.基金项目
国家重点研发计划项目"风沙侵蚀动力特征及空间分布"(2022YFF130080102) （2022YFF130080102）
