Effect of Shrub Planting on Runoff and Sediment under Simulated Rainfall

Abstract:

Effect of shrub on runoff and sediment yield and its hydraulic mechanism of shrub were studied under rainfall intensities of 45, 87 and 127mm/h with 20°slope gradient using simulated rainfall experiment. the results showed that average runoff rates ranged from 39.7 to 126.0 L/min for bare plots and 0.77 to 4.83 L/min for shrub plots, and the runoff rates from shrub plots were much less than from bare plots. Average sediment yields varied from 3636.7 to 9436.3 g/min for bare plots and from 28.0 to 421.6 g/min for shrub plots. The critical flow shear stress of 1.65 N/m2 on shrub slope and 0.861 N/m2 on bare slope were got under experiment condition. The sediment yield increased with the increase of flow shear stress. The experiment results are meaningful for quantifying runoff and sediment reduction and deepening soil erosion mechanical process also.

• Periodical: Applied Mechanics and Materials (Volumes 212-213)
• Pages: 141-144
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.212-213.141
• Online since: October 2012
• Authors: Pei Qing Xiao, Wen Yi Yao, Chang Gao Wang
• Keywords: Flow Shear Stress, Runoff, Sediment Yield, Shrub

References

[1] Ziegler, A.D. and Giambelluca T.W. Influence of revegetation efforts on hydrologic response and erosion, Kaho'olawe Island, Hawai'i. Land Degradation and Developmen.Vol. 9, No. 3(1998), pp.189-206

DOI: 10.1002/(sici)1099-145x(199805/06)9:3<189::aid-ldr272>3.0.co;2-r

[2] Wainwright J., Parsons A.J. and Abrahams A.D. Plot-scale studies of vegetation, overland flow and erosion interactions: case studies from Arizona and New Mexico. Hydrological Processes Vol. 14, No.16-17 (2000), pp.2921-2943

DOI: 10.1002/1099-1085(200011/12)14:16/17<2921::aid-hyp127>3.0.co;2-7

[3] Neave M. and Abrahams A.D. Vegetatition influences on water yields from grassland and grassland ecosystems in the Chihuahuan Desert. Earth Surface Processes and Landforms, Vol. 27, No. 9 (2002), pp.1011-1020

DOI: 10.1002/esp.389

[4] Pan C.Z. and Shangguan Z.P. Influence of forage grass on hydrodynamic characteristics of slope erosion. Journal of Hydraulic Engineering, Vol. 36, No. 3 (2005), pp.371-377 (in Chinese)

[5] Li M.,Yao W.Y., Chen J.N. and Ding W.F. Experiment study on runoff resistance of hill-gully slope with grass coverage. Journal of Hydraulic Engineering, Vol. 38, No.1 (2007), pp.112-119 (in Chinese)

[6] Wu S.F., Wu P.T., Feng H. and.Li M. Effects of forage shrub on the reduction of runoff and sediment and the hydrodynamic characteristic mechanism of slope runoff in the standard slope plot. Journal of Beijing Forestry University, Vol. 29, No. 3(2007), pp.99-104 (in Chinese).

[7] WANG L.L., YAO W.Y., SHEN Z.Z. Effects of shrub coverage on shallow flow hydraulic parameters and sediment reduction. Science of Soil and Water Conservation，Vol. 7, No. 7(2009), pp.80-83 (in Chinese).

[8] Braud I., VichA A.I.J., Zuluaga J., Fornero L. and Pedrani A. Vegetation influence on runoff and sediment yield in the Andes region: observation and modeling. Journal of Hydrology, Vol. 254, No.1-4(2001), p.124–144

DOI: 10.1016/s0022-1694(01)00500-5

[9] Nearing M.A., Norton L.D., Bulgakov, D.A., Larionov, G.A., WesL.T.t., and Dontsova K.M. Hydraulics and erosion in eroding rills, Water Resources Research，Vol. 33, No. 4(1997), pp.865-876

DOI: 10.1029/97wr00013