摘要
采用Ｋｎｉｇｈｔ等推导的计算断面流速分布的解析解，得出天然河道断面流速分布计算的公式。该模型计及了滩槽间的动量交换、边界阻力及断面上二次流的影响。天然河道的不规则断面形状用若干段折线表示。计算结果与前人的实验资料比较表明，该模型能够较好地给出断面流速分布。
By using the analytical model of Knight et al,the analytical solution of the distribution of depth averged velocity along the transverse direction is obtained.The model includes the effects of bed-generated turbulence,lateral shear turbulence and secondary flows.The irregular cross section of natural river is represented by a series of linear lines.Comparison of the analytical results with the experime￣tal data shows that the model predicts the velocity and discharge of overbank flow correctly.
