摘要
该文介绍一种解析方法 ,由细沟剥蚀率与含沙量关系以及剥蚀率与水流含沙量及沟长的微分物理表达式 ,推求出了含沙量与沟长关系数学表达式。提出了一种侵蚀细沟含沙量量化计算的新方法。并将用该方法计算得到的两种流量下细沟水流含沙量结果与由试验值进行了比较 ,结果表明 :两者相关密切 ,得到的 R2值均很高 ,最低为0 .81,验证了此解析式的有效性。
A analytic method was advanced for determining the relationship of sediment concentration change with rill length, from the relationship of the detachment rate of eroding rill with sediment concentration and the derivative function of detachment rate. The computed results from this analytic method was compared with those obtained directly from experiment, for the purpose of validating the method. And statistic analysis of the results under different slope and flow rate conditions showed very high correlative coefficients, with the lowest square correlative coefficient of 0.81. The results imply the validation of the analytical method advanced and that of the detachment rate function as related to sediment concentration in the flowing water, advanced in the related research.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2001年第6期5-8,共4页
Transactions of the Chinese Society of Agricultural Engineering
基金
中国科学院"百人计划"项目资助 ( 982 60 2 )
教育部资助项目 (重大 0 1-10 )
关键词
细沟侵蚀
解析法
含沙量
陡坡
估算方法
rill erosion
analytical method
sediment yield
steep slope
