The paper presents and interprets results on observations of water velocity and turbulence obtained in a tidal channel by use of a high resolution Doppler sonar. The observations are presented in the form of vertical profiles of Doppler spectra expressed with a velocity resolution of 0.2 cm s-1 and obtained continuously through several days, thereby covering numerous tidal cycles. Vertical profiles of mean longitudinal water flow expressed with a water depth resolution of 3.5 cm are presented and discussed. The vertical profiles of spectral variance are also calculated and interpreted in terms of the presence of turbulence generation, dissipation and transport. the observed velocity variance involves contribution from scales extending from the scattering dimension (3 to 15 cm) to possibly less than 0.5 cm, depending on the concentration of the targets. There is a striking organization and repeatibility of the velocity structures during successive tidal cycles. An attempt to separate the contribution to spectral variance due to a possible covariance between horizontal and vertical velocity components, is presented.