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| Wind Protection and Sand Fixation Effects of Soil Coagulant Sand Barrier |
| Dong Zhi1,Li Hongli2,Zuo Hejun3,Ding Guodong1,Sun Baoping1 |
| 1 Beijing Forestry University, 100083, Beijing; 2 Forestry College of Shan Dong Agricultural University, 271018, Taian, Shandong; 3 Ecology and Environment College of Inner Mongolia Agricultural University, 010019, Huhhot: China |
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Abstract The wind erosion characteristics of soil coagulant sand barrier with different concentration treatments were measured under wind tunnel test in the testing wind velocity of 7.0m/s,15.0m/s and 20m/s. The results showed that the strongest wind erosion resistance was sand fixing sampling of 40% concentration treatment, and the 20% sampling treatment was worst, but 30% treatment sampling was more practical. The soil coagulant sand barriers, which consisted of 1×1m,1.5×1.5m and 2×2m etc., with 30% concentration spraying was built on shifting sand dune at brim of oasis in northeast of Wulanbuhe desert. Based on the investigation of wind velocity, roughness, structure value ( λ ) of wind sand current, erosion and deposit conditions of sand barrier, the results showed that the best ability of deposition and erosion resistance of sand barrier was 1×1m scale, 1.5×1.5m was worse, and 2×2m was the worst. The ability of erosion resistance of barrier at different parts of sand dune was different. The erosion rate and erosion degree were strongest in windward slope of dune.
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Received: 27 November 2003
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