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| Comparison study on hydrodynamic parameters of plant-covered road and earth-covered road on the Loess Plateau |
| Wang Hao1,2,Wang Wenlong1,3,Jin Jian4,Wang Zhen1,Che Xiaoli3,Luo Ting3 |
1.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau,Institute of Soil and Water Conservation,CAS and
MWR,712100,Yangling,Shaanxi;2.Graduate University of Chinese Academy of Sciences,100049,Beijing;3.Northwest Sci-technological University of Agriculture and Forestry,712100 Yangling,Shaanxi;4.Xifeng Soil and Water Conservation Experimental Station,745000,Qingyang,Gansu:China |
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Abstract The condition of road erosion was extremely serious on the Loess Plateau,which caused great inconvenience to the agricultural production and transportation.At present,the plant-covered road was the most effective and economical way to prevent the road erosion.The scouring experiments were conducted to contrastive analyze the relationships between soil detachment rate and hydrodynamic parameters of plant-covered road and earth-covered road.The results showed that with the range of slope gradient from 3° to 9°,compared to the earth-covered road,the soil detachment rate of the plant-covered road reduced by 64.68%;Significant correlation exits between soil detachment rate and the hydrodynamic parameters,and the flow power has the highest significant correlation with soil detachment rate;There was a power function relationship between the soil detachment rate and the flow shear stress,and there was a linear relationship between the soil detachment rate and the flow power,energy consumption of unit width;It had important significance to get a further analysis on the mechanism of erosion reduction of plant-covered road.
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Received: 15 December 2009
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