泥沙粒径对推移质输沙率的影响  

THE INFLUENCE OF SEDIMENT DIAMETER ON BED-LOAD TRANSPORT RATE

作　　者：黄才安[1] 肖怀香 梅小文[1] 

机构地区：[1]扬州大学水利与建筑工程学院水利水电工程系,江苏扬州225009 [2]江苏省江都昭关自流灌区管理处,江苏江都225200

出　　处：《扬州大学学报（自然科学版）》2003年第3期71-74,共4页Journal of Yangzhou University：Natural Science Edition

基　　金：江苏省高校省级重点实验室开放课题(KJS01060);江苏省教育厅自然科学基金(00KJB570002)

摘　　要：根据近1000组推移质输沙试验资料,用多元回归的方法就泥沙粒径对推移质输沙率影响的问题进行了研究.结论为:当无因次粒径较小时,随无固次粒径的增大输沙率减小;而当无因次粒径较大时,输沙率与无因次粒径无关.并给出了一个考虑泥沙粒径影响的推移质输沙率公式.According to near 1 000 sets bed-load transport data, the problem about the influence of sediment diameter on bed-load transport has been analyzed by multi-regression method. The results show that sediment transport rate is smaller with greater sediment diameter when the dimensionless sediment diameter is below 500, and sediment transport rate is almost unvaried with varied sediment diameter when the dimensionless sediment diameter is above 500. In addition, a bed-load sediment transport rate equation which takes account the effect of sediment diameter is given out.

关 键 词：泥沙粒径 推移质 输沙率 有效切应力 

分 类 号：TV142.2[水利工程—水力学及河流动力学]