交错和矩形布置对树状植被地表剪应力和输沙率的影响

张萌, 亢力强, 王晓美

Effect of staggered and square arrangements on surface shear stress and sand transport rate on tree vegetated surface

Meng Zhang, Liqiang Kang, Xiaomei Wang

表2 交错布置时平均地表剪应力、粗糙元分担的剪应力和总剪应力与矩形布置的比值

Table 2 Ratios of average surface shear stress， shear stress acting on roughness elements and total shear stress in staggered array to that in square array

植株密度 /(株·m^-2)	u_f0 /(m·s^-1)	$\frac{τ_{s, 交错}^{'}}{τ_{s, 矩形}^{'}}$	$\frac{τ_{R, 交错}}{τ_{R, 矩形}}$	$\frac{τ_{交错}}{τ_{矩形}}$
18	8.0	0.915	1.035	1.017
	9.3	0.899	1.038	1.017
	10.8	0.902	1.037	1.018
	12.2	0.903	1.037	1.018
	13.6	0.881	1.040	1.017
32	8.0	0.862	1.071	1.050
	9.3	0.844	1.064	1.042
	10.8	0.836	1.055	1.035
	12.2	0.839	1.049	1.029
	13.6	0.835	1.043	1.024
50	8.0	0.828	1.101	1.081
	9.3	0.833	1.102	1.083
	10.8	0.846	1.103	1.086
	12.2	0.835	1.105	1.088
	13.6	0.847	1.105	1.089