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以新疆塔里木盆地垦区为例,研究不同地表粗糙度下垫面对风蚀起沙的临界摩擦速度和起沙风速的影响。根据Shao的方法计算不同下垫面起沙风速,结果表明:塔里木盆地垦区所选的小麦、棉花、红枣这3种地类2m高度临界摩擦速度(u*t)分别为棉花地0.40m/s,红枣地0.43m/s,小麦地1.85m/s;2m高度临界起沙风速(ut)分别为棉花地5.3m/s,红枣地5.7m/s,小麦地7.5m/s,小麦地较其他2种地类更具有抵抗风蚀的作用。
Taking the reclamation area of Tarim Basin in Xinjiang as an example, the effects of different surface roughness on the critical friction velocity and the wind speed of sediment during sandstorm initiation and sedimentation were studied. According to Shao’s method, the wind speed at different underlying surface was calculated. The results showed that the 2m height critical friction velocity (u * t) of wheat, cotton and red jujube in the reclamation area of Tarim Basin was 0.40m / s , Red dates of 0.43m / s, wheat 1.85m / s; 2m height of the critical wind speed (ut) were cotton 5.3m / s, jujube 5.7m / s, wheat 7.5m / s, The other two kinds of land use are more resistant to wind erosion.