河渠水面线计算中几个关键问题探讨  

Study on a Few Key Problems in the Calculation of Water Level Line of River and Channel

作　　者：刘曾美[1] 吴俊校[2] 陈明[2] 肖素芬[2] 

机构地区：[1]华南理工大学水利水电工程系,广州510640 [2]广东省水利水电建设管理中心,广州510600

出　　处：《灌溉排水学报》2010年第5期121-125,共5页Journal of Irrigation and Drainage

基　　金：广东省防洪减灾研究项目

摘　　要：从应用角度出发探讨可能导致河渠水面线计算误差的几个关键问题:①应用条件的控制与水面线计算结果精度的把握,并以实例探讨河道底坡、计算河段的长度Δs和起推水位对结果精度的影响;②弯道水流的横向和纵向水面线计算;③扩散河段、收缩河段以及有支流汇入的河段在不同缓急状态下是否计入局部水头损失对水面线结果的影响。这些探讨可为堤防工程规划设计提供参考。This study which exactly proceeds from the angle of application has pointedly probed into a few key problems existing in the calculation of water surface line as bellows： ①to grasp application condition and the calculated results accuracy of the water level line,moreover,by examples,this thesis probe into how the results of water level line influenced by riverway bottom slop and the length of the calculated reach ＂Δs＂ and the ascertained water level;②to explore the calculation methods of the transverse and longitudinal water surface line in curving watercourse;③to compute and compare the difference of the results of water surface line between considering and neglecting the local head loss in diversified water current state for diffused reach,shrinkage reach and the reach in which there is afflux of anabranch.The study can provide a reference for planning design of dike engineering.

关 键 词：水面线 计算精度 弯道水流 局部水头损失 

分 类 号：TV133[水利工程—水力学及河流动力学]