水资源与水工程学报2026，Vol.37Issue(3)：109-116,126,9.DOI:10.11705/j.issn.1672-643X.2026.03.13
十大孔兑地区风沙运动及沉积特征数值模拟
Numerical simulation of aeolian sand movement and deposition characteristics in the Ten Tributaries region
摘要
Abstract
The Ten Tributaries region in Inner Mongolia,shaped by alternating wind and water erosion,has developed a stepped gully landform and become a major sediment source for the Yellow River.To in-vestigate the transport and deposition patterns of aeolian sand under complex topography,we extracted typical profile characteristics based on three-dimensional aerial photogrammetry data to establish a simpli-fied geomorphic boundary,and then used the discrete phase model(DPM)in Computational Fluid Dy-namics to simulate the sand deposition process in gullies at various channel locations.The results demon-strate that the stepped gully significantly alters the near-surface wind field;its steep slopes induce strong airflow separation and reverse vortices,leading to a sharp dissipation of kinetic energy at the gully bottom and forming a highly efficient"sediment trap".Concurrently,the shielding and blocking effects of the terrain intensify as the gully deepens and widens,resulting in a significantly increasing trend in cumula-tive sand deposition from the end to the root of the channel,and making the channel root the primary core area for aeolian sand accumulation.This mechanism verifies the"source-sink"conversion function of the gully terrain—storing sand during the dry season and transporting sand during the rainy season.This indicates that controlling aeolian sand accumulation at the channel root is a crucial link in managing the sediment load entering the Yellow River.关键词
风沙运动/沉积特征/沟壑地形/黄河泥沙/数值模拟/十大孔兑Key words
aeolian sand transport/deposition characteristics/gully topography/sediment load in the Yellow River/numerical simulation/Ten Tributaries分类
天文与地球科学引用本文复制引用
仲崇宇,李慧,张宁,蒋学玮..十大孔兑地区风沙运动及沉积特征数值模拟[J].水资源与水工程学报,2026,37(3):109-116,126,9.基金项目
国家自然科学基金项目(41201262、52208207) （41201262、52208207）
内蒙古自治区科学技术厅"揭榜挂帅"项目(2024JBGS0016) （2024JBGS0016）
西安市科技计划项目(2024JH-CLYB-0117) （2024JH-CLYB-0117）
