Near-field dispersion of a buoyant plume

Numerical models of the dispersion of a pollutant from a coast or estuary outfall require data obtained from field or laboratory measurements for calibration. A laboratory test rig has been constructed to provide information on the initial or 'near-field' dispersion of warm water from a circular, horizontal outfall 25mm in diameter at a depth of 0.6m when it is discharged into a body of water flowing in the direction of discharge.