Some measurements were conducted in a suddenly expanding flume with a rough bottom. In the approach flume, the friction velocity was determined in three ways and the distributions of turbulence intensities and Reynolds stress in a vertical were obtained. The measurement of the separating turbulent flow comprised the distribution of depth-averaged velocity and turbulence quentities (u', v', -uv and u^2 +v^2) in the separation region and the vertical distribution of turbulence quentities in the mixing layer. To measure instantaneous velocity components a Laser Doppier Velocimeter and a Data Acquisition System were employed. The data were processed using a digital filter.