弯道环流悬移质横向输沙公式研究  

Suspended Load Transverse Transportation Formula Induced Bend Circulation

作　　者：李志威[1] 方春明[1] 

机构地区：[1]中国水利水电科学研究院泥沙研究所,北京100048

出　　处：《人民黄河》2011年第8期25-27,共3页Yellow River

基　　金：国家自然科学基金资助项目(10772201)

摘　　要：为解决现有的弯道悬移质横向输沙公式形式复杂、不便使用的问题,对Odgaard线性环流流速公式进行了简化,同时,以简化的环流流速公式和Laursen悬移质含沙量公式为基础,推导了弯道悬移质横向输沙率公式。公式验证结果表明:①简化后的线性环流流速公式形式简单,与实测资料符合较好;②推导得到的弯道悬移质横向输沙率公式变量较少且形式简单,在无高精度计算弯道悬沙横向输移的要求下,可用于实际工程的近似计算;③弯道环流引起的下部输沙量始终大于上部的输沙量。In order to figure out the problem of complex format and pool application of bend transverse transport sediment formula,it is necessary to simplify and validate Odgaard＇s linear circulation velocity formula.Simultaneously,making use of the modified circulation formula and Lauren＇s concentration formula,transverse transport sediment rate formula of bend suspended load is acquired.The new formula has simple format and fewer variables.The results are presented that the modified circulation formula well accords with experiment data,and the transverse transport sediment rate formula exists small deviation with other two formulas and can be used to appropriate computation of practical engineering without the high precision demand of calculating transverse transportation sediment.Sediment transport rate of the bottom zone induced by bend circulation is always more than the upper zone because of the bottom zone concentration of suspended load being higher than that of the upper zone.

关 键 词：横向输沙率 悬移质 环流流速 公式 弯道环流 

分 类 号：TV147[水利工程—水力学及河流动力学]