【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。更多还原

【Abstract】 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.更多还原