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在实验风洞里利用木棍模拟植物,研究侵蚀量与风速、植物密度、植物高度、植物直径的关系。为使测定方便采用可移动的沙盘,直径为3mm、7mm,高50、150、250mm的木棍,以模拟谷物等植物,密度为20~400根/m~2。然后对有“植被”的土地和裸露土地进行土壤侵蚀试验比较。实验表明:风烛量(SL)与风障调节后的速度(υ_h),起沙临界风速(υ_t)、木棍密度(N)、直径(D)、高度(H)的关系可用方程SL=298(υ_h-υ_t)/(?)NDH-3.396来表示,其变差范围为82%。研究说明即使植被很稀少也能明显地减少风蚀量。
In the experimental wind tunnel, a wooden stick was used to simulate plants, and the relationship between erosion amount and wind speed, plant density, plant height and plant diameter was studied. In order to facilitate the determination of removable sand table, the diameter of 3mm, 7mm, 50,150,250 mm high wood sticks to simulate plants such as grains, the density of 20 ~ 400 / m ~ 2. Then compare the soil erosion test between “vegetation” land and bare land. Experiments show that the relationship between the amount of windshield (SL) and the speed (υ_h), the critical wind speed (υ_t), the density (N), the diameter (D) and height (H) 298 (υ_h-υ_t) / (?) NDH-3.396, the variation range is 82%. Research shows that wind erosion can be significantly reduced even with very few vegetation.