List of symbols

Nature and biological importance of fluid motion

Viscosity and turbulence

Statistical concepts of turbulence: Velocity fluctuations - Reynolds stresses - Eddy viscosity - Scales of turbulence - The eddy spectrum - The mixing length - Effect of density gradients - Dimensionless numbers

Types of motion in lakes and rivers: Introduction - Motion in the atmosphere - Motion in lakes and rivers

Turbulent motion near solid boundaries: Velocity profiles near a solid boundary - Properties of the logarithmic velocity profile - Vertical variation in eddy viscosity - Drag and lift coefficients - Energy losses and resistance to motion in a river - Settling velocity of particles in water

Free turbulence: - Waves on a lake surface - Surfaces of discontinuity - Motion in thermoclines - River flow into lakes

Detailed discussion of diffusion: The nature of turbulent diffusion - The solution of diffusion equations - Experimental values of diffusion coefficient

Behaviour of small particles in turbulent flow: Definition of particle characteristics - Resistance of particles to erosion - Behaviour of particles in suspension