For a given channel geometry slope and roughness and a specified value of discharge a unique value of depth occurs in steady uniform flow.
对于给定的河道几何形状、坡度、粗糙度以及规定排水量，均匀稳流中出现唯一深度值。
2
Rutting is one of the major deterioration forms of high level asphalt pavement for channel traffic and the significant factor to affect the roughness, performance, driving safety and comfort.