嫩江白沙滩至三岔河口江段中小洪水河床糙率分析

Analysis of bed roughness during middle and small floods from Baishatan to Sanchahekou for Neijiang river

文章通过对嫩江白沙滩至三岔河口江段中小洪水不同级别条件下河床糙率变化规律分析,得出哈尔淖主槽糙率变化规律,糙率随水位的上升而逐渐变小,而水位在130.4 m以上洪水全面跑滩,糙率增大。

The paper analyzes the change law of the bed roughness of river reach f from Baishatan to Sanchahekou or Neijiang river under different degree of middle and small floods, obtains the main channel roughness change law of the HaerNao. The roughness becomes smaller while the water level rising. when the water level is above 130.4 m and the floods over the bank, the roughness will increase.