Huang Peng-Fei, Wang Wen-Long, Luo Ting, Wang Zhen, Wang Zheng-Li, Li Ren
Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, Shaanxi, China.
Ying Yong Sheng Tai Xue Bao. 2013 Feb;24(2):497-502.
By the method of field runoff washout experiment, a simulation study was conducted on the relationships between the soil detachment rate and the hydrodynamic parameters on unpaved road, and the related quantitative formulas were established. Under the conditions of different flow discharges and road gradients, the averaged soil detachment rate increased with increasing flow discharge and road gradient, and the relationships between them could be described by a power function. As compared with road gradient, flow discharge had greater effects on the soil detachment rate. The soil detachment rate had a power relation with water flow velocity and runoff kinetic energy, and the runoff kinetic energy was of importance to the soil detachment rate. The soil detachment rate was linearly correlated with the unit runoff kinetic energy. The averaged soil erodibility was 0.120 g m-1.J-F-1, and the averaged critical unit runoff kinetic energy was 2.875 g.m-1.J-1. Flow discharge, road gradient, and unit runoff kinetic energy could be used to accurately describe the soil erosion process and calculate the soil erosion rate on unpaved road.
通过田间径流冲刷试验方法，对未铺砌道路上土壤剥离率与水动力参数之间的关系进行了模拟研究，并建立了相关定量公式。在不同流量和道路坡度条件下，平均土壤剥离率随流量和道路坡度的增加而增大，二者关系可用幂函数描述。与道路坡度相比，流量对土壤剥离率的影响更大。土壤剥离率与水流速度和径流动能呈幂函数关系，径流动能对土壤剥离率至关重要。土壤剥离率与单位径流动能呈线性相关。平均土壤可蚀性为0.120 g·m⁻¹·J⁻¹·F⁻¹，平均临界单位径流动能为2.875 g·m⁻¹·J⁻¹。流量、道路坡度和单位径流动能可用于准确描述未铺砌道路上的土壤侵蚀过程并计算土壤侵蚀速率。
