摘要
推移质输沙规律研究是泥沙基本理论的重要内容。在对前人主要研究成果开展述评的基础上,进一步从能量平衡观点及能耗图形出发,全面考虑影响河流推移质运动的因素,合理确定不同条件下的泥沙起动流速、摩阻参数A65与水下休止角,建立了物理图形清晰、结构合理、便于使用且适用性更强的推移质输沙率公式。采用大江大河与中小河流资料以及试验室实测资料对公式的检验结果表明,文章建立的公式(19)在不同条件下均能同实测点据接近,有效提高了推移质输沙率公式的计算精度和工程实用价值。
The study of bed--load transport rate is an important subject of fluvial hydraulics. Based on the discussion of previous research, this paper established a new bed--load transport equation from the point of view of energy balance and consumption, featured by clear physical graphics, reasonable structure, and practical applicability. Moreover, this equation took all fac tors affecting bed-load transportation into account, of which threshold velocity of sediment in different conditions, the friction parameter A65, and the angle of repose were rationally determined. The comparison between calculations and measurements showed that the present equation is in good agreement with the measured data, which considerably improves the accuracy of bed-load transport rate and applicability in engineering
出处
《南水北调与水利科技》
CAS
CSCD
2011年第6期140-145,共6页
South-to-North Water Transfers and Water Science & Technology
基金
国家自然科学基金委重点项目(51039003)
关键词
推移质运动
输沙率
公式
泥沙运动
bed-load transport
sediment discharge
sediment transport
