Overland Flow Erosion Capacity
Soil erosion caused by water flow is a complex problem. Both empirical and physically based approaches were used for the estimation of surface erosion rates. Their applications are mainly limited to experimental areas or laboratory studies. The maximum sediment concentration overland flow can carry is not considered in most of the existing surface erosion models. The lack of erosion capacity limitation may cause over estimations of sediment concentration. A correlation analysis is used in this study to determine significant factors that impact surface erosion capacity. A bounded regression formula is used to reflect the limits that sediment concentration cannot be less than zero nor greater than a maximum value. The coefficients used in the model are calibrated using published laboratory data. The computed results agree with laboratory data very well. A one dimensional overland flow diffusion wave model is used in conjunction with the developed soil erosion equation to simulate field experimental results (Barfield et al., 1983). This study concludes that the non-linear regression method using unit stream power as the dominate factor performs well for the analysis of overland flow erosion capacity.
overland flow erosion capacity
Chih TedYang Hui-Ming Shih
Department of Civil and Environmental Engineering, Colorado State University, Fort Collins, Colorado 80523, USA
国际会议
山东东营
英文
10-24
2007-10-16（万方平台首次上网日期，不代表论文的发表时间）