干旱区研究2025，Vol.42Issue(9)：1650-1659,10.DOI:10.13866/j.azr.2025.09.09
回字形固沙体系固沙效应的风洞模拟试验
Wind tunnel simulation test on sand-fixing effect of the nested-square sand-fixing system
摘要
Abstract
This study proposes an innovative sand-checkerboard barrier system based on optimized,stead-state di-mensions(height-to-length ratio=0.1-0.2),constructed using locally sourced sand to create barriers with a height and length of 20 cm and 100 cm,respectively.Although these sand checkerboards are efficient and cost-effective to construct,they are susceptible to aeolian erosion.To overcome this limitation,we developed a nested-square protection system that integrates sand checkerboards with peripheral barriers made of fiber netting or brush straw checkerboards.Through wind tunnel simulations,we systematically evaluated three configurations:standalone sand checkerboards,fiber-net+sand-checkerboard combinations,and brush-straw-checkerboard+sand-checker-board composites.The quantitative analyses included sediment flux density profiles,surface erosion/deposition patterns,and functional modeling of height-dependent sand transport.The main findings of this study are summa-rized as follows.(1)Standalone sand checkerboards effectively reduce sediment flux density within 0-10 cm height but increase transport at higher levels.(2)Front flexible barriers significantly attenuate aeolian kinetic en-ergy,with brush straw checkerboards outperforming fiber nets in transport reduction(84.6％＞80.6％).(3)Front barriers effectively maintain barrier integrity at 10 m·s-1,whereas brush straw checkerboard demonstrates superi-or protection under extreme winds than the fiber net counterpart(The height of sand-checkerboard decreased by 2-8 cm vs.3-9 cm).(4)Synergistic interactions in the composite systems enhance overall sediment retention and extend service life compared to the standalone configurations.The superior performance of the brush straw check-erboard barriers is attributed to their three-dimensional structure,which creates turbulent microzones for en-hanced energy dissipation and their lower comprehensive cost.Moreover,this study offers a scientifically ground-ed framework for optimizing the barrier design,promoting"local-material utilization"and"sand-combatting-sand"strategies in the desertification control.The proposed nested-square system offers a scalable solution that balances ecological sustainability with engineering effectiveness for arid land management.关键词
回字形固沙体系/沙方格沙障/纤维网沙障/刷状草方格沙障/风洞模拟试验Key words
nested-square sand-fixing system/sand-checkerboard barrier/fiber net barrier/brush straw checker-board barrier/wind tunnel simulation test引用本文复制引用
屈建军,朱志昊,申保收,高永平,李宏..回字形固沙体系固沙效应的风洞模拟试验[J].干旱区研究,2025,42(9):1650-1659,10.基金项目
内蒙古自治区科技重大专项"揭榜挂帅"项目(2024JBGS00130203) （2024JBGS00130203）
