Plants can reduce the effects of wind erosion on erodible surfaces by absorbing momentum near sandy surfaces. We used models having the same cross-sectional shape as three common plants in the arid regions of Mongolia and carried out tests in a wind tunnel equipped with a turbulence generator and a piezoelectric blown-sand meter. We studied the effects of plant shape and coverage on the sand accumulation amount, roughness length, and blown-sand flux. With a cone array or an inverted truncated cone array, roughness length increased as the modeled plant coverage increased up to 21.1%, similar to the accumulation amount trend. With a cylinder array, however, roughness length reached a maximum at 6.6% coverage and then gradually decreased. The accumulation amount also trended downward at coverages greater than 15.4%, a change we attributed to changes in the wake distribution. In addition, the wind-blown-sand flux results showed that a cylinder array had a strong inhibitory effect on the blown-sand flux at heights above 10 cm, whereas the inhibitory effect of a cone array was small. Moreover, with an inverted truncated cone array, the suppression effect on the flux below 10 cm was similar to that with the cone array, and the suppression effect on the flux above 10 cm was more pronounced than that with a cylinder array. Our results can be applied to evaluate how shape affects the suitability of a plant for reducing wind erosion in southern Mongolia and potentially in other arid and semi-arid regions.

植物可以通过吸收沙质表面附近的动量来减少风蚀对易蚀表面的影响。我们使用了具有与蒙古干旱地区三种常见植物相同的横截面形状的模型，并在配备了湍流发生器和压电吹沙计的风洞中进行了测试。我们研究了植物形状和覆盖度对沙粒积累量，粗糙度长度和吹沙通量的影响。对于圆锥阵列或倒截头圆锥阵列，随着建模植物覆盖率的增加，粗糙度长度会增加，最高可达21.1％，这与累积量趋势相似。但是，对于圆柱阵列，粗糙度长度在覆盖率达6.6％时达到最大值，然后逐渐减小。覆盖率大于15.4％时，累积量也呈下降趋势，我们将其归因于唤醒分布的变化。另外，风沙通量结果表明，圆柱阵列对高度大于10 cm的吹沙通量具有较强的抑制作用，而圆锥阵列的抑制作用较小。而且，对于倒截头圆锥阵列，对10cm以下的通量的抑制效果与圆锥阵列相似，并且对10cm以上的通量的抑制效果比圆柱阵列更明显。我们的结果可用于评估形状如何影响植物在蒙古南部以及其他干旱和半干旱地区减少风蚀的适宜性。风吹砂通量结果表明，圆柱阵列对高度大于10 cm的吹砂通量具有较强的抑制作用，而圆锥形阵列的抑制作用较小。而且，对于倒截头圆锥阵列，对10cm以下的通量的抑制效果与圆锥阵列相似，并且对10cm以上的通量的抑制效果比圆柱阵列更明显。我们的结果可用于评估形状如何影响植物在蒙古南部以及其他干旱和半干旱地区减少风蚀的适宜性。风吹砂通量结果表明，圆柱阵列对高度大于10 cm的吹砂通量具有较强的抑制作用，而圆锥形阵列的抑制作用较小。而且，对于倒截头圆锥阵列，对10cm以下的通量的抑制效果与圆锥阵列相似，并且对10cm以上的通量的抑制效果比圆柱阵列更明显。我们的结果可用于评估形状如何影响植物在蒙古南部以及其他干旱和半干旱地区减少风蚀的适宜性。并且对10 cm以上的通量的抑制作用比圆柱阵列的抑制作用更明显。我们的结果可用于评估形状如何影响植物在蒙古南部以及其他干旱和半干旱地区减少风蚀的适宜性。并且对10 cm以上的通量的抑制作用比圆柱阵列的抑制作用更明显。我们的结果可用于评估形状如何影响植物在蒙古南部以及其他干旱和半干旱地区减少风蚀的适宜性。