total impedance

Based on the function of forest ecological system,local slope flow losses and its total friction are amalyzed to offer theoretical base for research on control of non point source pollution transportation in forest.

采用运动波方程 ,用矩阵理论推导出坡面流的一般方程 ,结合森林生态系统的功能 ,分析了坡面流的局部损失和总阻力 ,为研究森林控制非点源污染输移提供了理论依据。

The overall drag coefficient and roughness length were derived by a curve-fitting method.

在风洞中用圆柱形木棒模拟直立植被，研究了地表总阻力系数ＣＤ、直立植被阻力系数Ｃｆ和粗糙度ｚ０及其影响因素。