Runoff producing characteristics of vegetation carpet greening technology at different rainfall intensities
Yue Huanbi,Yang Jianying,Yang Yang,Shi Changqing,Zhao Ping,Shen Yi
1. College of Soil and Water Conservation, Beijing Forestry University,100083,Beijing,China;2. Beijing Orient Landscape Co. ,Lt. , 100087,Beijing,China;3. Institute of Highway Since, Ministry of Transport of the People‘s Republic of China,100088,Beijing,China
Abstract：The objectives of this study were to explore the applicability of vegetation carpet technology in different climate conditions, and analyze the impact of different rainfall intensities on runoff, infiltration coefficients and infiltration depth. We set up three rainfall intensities (0.56, 1.01, 2.02 mm/ min), filled earth into erosion boxes and arranged various types of vegetation carpets, and simulated construction slope. Non-coverage control groups were set up, and simulated rainfall was conducted over the erosion boxes in the tangential spraying hall. The results showed that: 1) Vegetation carpet could increase runoff infiltration; at the rainfall intensity of 1.01 mm/ min, wheat straw vegetation carpet and coconut fiber vegetation carpet can increase the infiltration by 27.7% and 28%, respectively. 2) There were significant differences in runoff process of the vegetation carpets made by different materials; at the rainfall density of 0.56 and 1.01 mm/ min, infiltration coefficient of wheat straw was higher than that of coconut fiber, while the opposite was true at 2.02 mm/ min. 3) There were marked differences between the total runoff of the vegetation carpets made by the same material but different masses; for the same material, the vegetation carpet with a mass of 200 -300 g/ m2 had better water retention performance at the three rainfall densities than the vegetation carpets of other masses.
2015, Vol. 13 
