Tc. Atkinson et Pm. Davis, Longitudinal dispersion in natural channels: 1. Experimental results from the River Severn, UK, HYDROL E S, 4(3), 2000, pp. 345-353
A tracer experiment using Rhodamine WT dye was carried out to measure longi
tudinal dispersion in a 14-km reach of the River Severn in Wales, U.K. The
river's discharge was measured at six points and the depth, width and cross
-sectional area were measured at 86 points along the test reach. The channe
l geometry was close to being statistically uniform. Discharge and velocity
were both nearly constant. Dye concentrations were recorded at stations be
tween 210 and 13775 m downstream of injection. Dye was injected over a shor
t interval as a near-uniform line source across the channel. These conditio
ns make the data useful for testing mathematical theories of dispersion. Th
ey are presented in full.