Experimental study on distribution properties of velocity in rectangular open channel

Through the flume experimental research,the velocity distribution formulas for rectangular open channel have been found,including parabola form of velocity distribution on the vertical and power form of mean velocity distribution on the transverse direction;meanwhile,the means of ascertaining correlative coefficient have been given in this paper.Validation of the observing velocity data in different channels indicates that the velocity-distribution law given by authors is in accordance with the real velocity-distribution perfectly in open channel;and the relative error between observing value and calculating value of point velocity is small,which can satisfy the precision requirement in the calculation of velocity distribution and discharge in open channel.