standing vegetation drag coefficient 直立植被阻力系数
When applied separately, standing vegetation and clods can increase drag coefficient effectively.
在分别应用时，直立植物和砾石覆盖均可以有效地增大阻力系数。
It is a indubitable fact that the deterioration of soil environment in loess plateau is caused by the long — standing destruction of vegetation and the serious erosion of soil and water.
由于长期的植被破坏和严重的水土流失黄土高原土壤环境的恶化是无容置疑的事实。
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