| 干枯植被覆盖对公路沿线地表风沙流结构的影响 |
| |
| 引用本文： | 冬梅,图雅,李巨河.干枯植被覆盖对公路沿线地表风沙流结构的影响[J].水土保持通报,2023,43(4):17-23. |
| |
| 作者姓名： | 冬梅 图雅 李巨河 |
| |
| 作者单位： | 内蒙古农业大学 能源与交通工程学院, 内蒙古 呼和浩特 010018;内蒙古农业大学 机电工程学院, 内蒙古 呼和浩特 010018 |
| |
| 基金项目： | 内蒙古自治区自然科学基金项目“半干旱地区草原公路沿线地表土壤风蚀研究”(2020MS03050);内蒙古自治区科技重大专项专题项目(2020ZD0009-4);内蒙古自治区科技计划项目(2020GG0078) |
| |
| 摘 要： | 目的] 以内蒙古S105草原公路沿线地表为研究对象，探讨挟沙风作用下干枯植被覆盖度对风沙流结构的影响，旨在为防治公路两侧土壤风蚀提供理论参考依据。方法] 采用风洞模拟试验，在0%，20%，40%和50%覆盖度水平下测定输沙率。结果] 在挟沙风作用下，输沙率随干枯植被覆盖度的增大而递减，最大输沙率点的高度层不断上升。覆盖度为0%时，输沙率随高度的增加呈指数函数规律降低；覆盖度为20%，40%和50%时，输沙率随高度的增加呈递减→递增→递减→趋于平缓的变化规律；在85 mm高度以下符合多项式函数关系，85 mm高度以上符合指数函数关系。随覆盖度的增大总输沙量递减，最大抗风蚀效率达65.73%。结论] 干枯植被覆盖显著影响地表风沙流结构，可削弱挟沙风侵蚀力，是抑制公路沿线地表土壤风蚀沙化的有效措施。
|
| 关 键 词： | 公路沿线环境 土壤风蚀 挟沙风 干枯植被覆盖 风沙流结构 |
| 收稿时间： | 2022/10/6 0:00:00 |
| 修稿时间： | 2022/12/5 0:00:00 |
Effect of Dry Vegetation Cover on Surface Sand-carrying Wind Structure Along Highways |
| |
| Dong Mei,Tu Y,Li Juhe.Effect of Dry Vegetation Cover on Surface Sand-carrying Wind Structure Along Highways[J].Bulletin of Soil and Water Conservation,2023,43(4):17-23. |
| |
| Authors: | Dong Mei Tu Y Li Juhe |
| |
| Institution: | College of Energy and Transportation Engineering, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, China;College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, China |
| |
| Abstract: | Objective] The influence of dry vegetation cover on the structure of wind-blown sand flow under the action of sand-carrying wind of S105 in Inner Mongolia Autonomous Region was studied in order to provide a theoretical reference for the prevention of soil wind erosion on both sides of a grassland highway. Methods] Sediment transport rates were measured at 0%, 20%, 40%, and 50% vegetation cover levels by wind-tunnel simulation tests. Results] Under the action of sand-carrying wind, the sediment transport rate decreased as dry vegetation cover increased, and the height of the maximum sediment transport rate rose as cover increased. When vegetation cover was 0%, the sediment transport rate decreased exponentially as height increased. As vegetation cover increased to 20%, 40%, and 50%, the sediment transport rate decreased, then increased, then decreased, and then tended to be flat as height concurrently increased. These results can be described by a polynomial function below 85 mm height and by an exponential function above 85 mm height. Total sediment discharge decreased as vegetation coverage incrased, and the maximum anti-wind erosion efficiency was 65.73%. Conclusion] Dry vegetation cover significantly affected the structure of surface wind-blown sand flow, which can weaken the erosion force of sand-carrying wind. Dry vegetation cover is an effective means of inhibiting wind erosion and desertification of surface soil along highways. |
| |
| Keywords: | highway environment soil wind erosion sand-carrying wind dry vegetation cover structure of wind-blown sand flow |
|
| 点击此处可从《水土保持通报》浏览原始摘要信息 |
| 点击此处可从《水土保持通报》下载免费的PDF全文 |
|
