摘要
示踪法经验系数可能受坡度、水流速度、流量等多种因素的影响 ,该文经过流量法和盐液示踪法的实验结果比较发现 :泥沙含量较低时 ,随流速增加而增大 ,泥沙含量较高 ,其值基本不变 ,但经验系数与速度的相关性都较差 ,而各种坡度下测量经验系数的平均值与泥沙含量具有较好的正相关性 。
The empirical coefficient may be affected by slope, flow velocity, discharge and other factors. Compared with the velocities measured by salt tracer and discharge method, the empirical coefficients increased with the velocity enhance in lower sediment concentration flow, vary little when the sediment concentration was high enough, but the correlation between the velocity and coefficient was not good enough. The mean coefficients in different slopes were right interrelated strictly to the sediment concentration, so the sediment concentration is the main factor affecting the coefficient of tracer flow.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2003年第4期97-100,共4页
Transactions of the Chinese Society of Agricultural Engineering
基金
国外杰出人才基金 (982 60 2 )
国家自然科学基金(40 1 71 0 62 )
中科院知识创新重要研究方向项目 (KZCX3- SW- 4 2 2 )
关键词
薄层水流
水流速度
示踪法
经验系数
laminar flow
flow velocity
tracer method
empirical coefficient
