Mixed‐Layer Deepening in Lakes after Wind Setup

Abstract

Laboratory experiments on wind‐driven mixed‐layer deepening in a wind flume are described for the situation where the wind shear stress has become balanced by a streamwise pressure gradient so that the mean mixed‐layer velocity has vanished. The results were obtained at two lengths of the flume, and include visual observations, entrainment rates, density profiles, velocity profiles and profiles of turbulence intensities. An intermediate upwind wedge formed by accumulation of mixed water was observed in all experiments. The entrainment law obtained agrees with Kraus and Turner's relationship, and is almost independent of the length of the flume.