STRUCTURE OF RIVER TURBULENCE BEHIND WARM-WATER DISCHARGE

The paper presents special measurements of the turbulence characterist ics in the river reach just behind the discharge of warm water from a thermal-electric power plant. The measurements of the values of instan taneous longitudinal velocities were taken with special micropropeller meters in 54 different verticals (simultaneously in six points at a v ertical). The main characteristics of turbulence and basic hydraulic a nd morphometric quantities are computed and the analysis of different physical phenomena in the river reach is presented. The analysis conce rns the spatial distributions of velocity and water-temperature values , kinetic energy of turbulence, turbulence intensity, and the dissipat ion rate of energy. The quantitative estimations of the scales of turb ulence were carried out on the basis of analysis of frequency spectra, autocorrelation, and structural functions. Various empirical formulas were derived and checked.