[1]王翔宇,原鹏飞,丁国栋,等.不同植被覆盖防治土壤风蚀对比研究[J].水土保持研究,2008,15(05):38-41.
　WANG Xiang-yu,YUAN Peng-fei,DING Guo-dong,et al.Study on Mechanism Between Natural Shrub-grass and Soil Wind Erosion[J].Research of Soil and Water Conservation,2008,15(05):38-41.
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不同植被覆盖防治土壤风蚀对比研究

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 15 期数: 2008年05期 页码: 38-41 栏目: 出版日期: 2008-10-20
Title:
Study on Mechanism Between Natural Shrub-grass and Soil Wind Erosion
作者:
王翔宇1, 原鹏飞1, 丁国栋1, 尚润阳2, 孙保平1, 张宇清1, 吴斌1, 马士龙3
1. 北京林业大学 水土保持学院, 教育部水土保持与荒漠化防治重点实验室, 北京 100083;
2. 海河水利委员会, 天津 300170;
3. 中水北方勘测设计研究有限责任公司, 天津 300222
Author(s):
WANG Xiang-yu1, YUAN Peng-fei1, DING Guo-dong1, SHANG Run-yang2, SUN Bao-ping1, ZHANG Yu-qing1, WU Bin1, MA Shi-long3
1. Key Laboratory of Soil and Water Conservation and Combating Desertification, Ministry of Education, College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;
2. Haihe River Water Conservancy Committee, Tianjin 300170, China;
3. The Medium North of the Water Surveys the Design Research Limited Liability Company, Tianjin 300222, China
关键词:
土壤风蚀; 植被盖度; 地表粗糙度; 输沙率; 风沙流结构
Keywords:
soil wind erosion; vegetation coverage; aerodynamic roughness; rate of sand transporting; the structure of wind-sand flow
分类号:
S157
摘要:
通过对毛乌素沙地不同下垫面上风速、地表粗糙度、临界起沙风速、风沙流结构的观测，发现植被覆盖可以有效防止地表风蚀：植被盖度为40%的固定沙地近地表0.2 m高度平均风速比流动沙地降低45%，侵蚀风的持续时数降低83%，临界起沙风速提高70%，地表粗糙度提高190倍；当风沙流速度相同时，20%覆盖度的半固定沙地较流动沙地可平均降低输沙79.4%；而植被盖度为40%的固定沙地较流动沙地可平均降低输沙95.6%。实验证明，单株植物同样可以降低风速。疏透结构和透风结构的单株沙蒿分别可以使植株后0.5 m高度的风速较植株前方平沙地同高度的风速下降59.4%和19.8%。
Abstract:
Through field investigation on wind speed, aerodynamic roughness, rate of sand transporting and the structure of wind-sand flow on different underlying surfaces, we found that vegetation cover can prevent soil wind erosion effectively. Compared the fixed sandland whose vegetation coverage is 40% to the drifting sand dune which has no coverage, the average wind speed at the height of 0.2 m reduced 45%, the time of threshold wind velocity of soil erosion kept on reduced 83%, while the threshold wind velocity of soil erosion increased 70% and aerodynamic roughness increased 190 times; Compared to the drifting sand dune, when the speed of wind-sand flow is similar, the rate of sand transporting on semi-fixed sandland reduced 79.4%, while fixed sandland reduced 95.6%. The results indicated that a single plant can reduce wind speed too. Two single Artemisia ordosica could reduce wind speed at the height of 0.5 m by 59.4% and 19.8%.

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备注/Memo

收稿日期:2007-11-7。
基金项目:国家科技支撑课题（2006BAD26B0702）;国家科技支撑课题（2006BAD26B03）
作者简介:王翔宇（1983- ），男，在读博士;研究方向：荒漠化防治。E-mail：ylhlllxzx@163.com
通讯作者:丁国栋（1963- ），男，内蒙古赤峰人，教授，主要研究方向：荒漠化防治。E-mail：dch1999@163.net

更新日期/Last Update: 1900-01-01