Abstract
The large scale inclined plume was observed in Lake Ogawara. It had a far larger scale of the motion and velocity than those in the laboratory experinatal flume, so that its Reynolds number was 105. The entrainment coeffcient and the Richardson number were estimated from the data and those were compared with other laboratory experiments of inclined plume. Both results were on a same curve which decreased rapidly when the Richardson number approached to 1. They imply that the entrainment law for inclined plume with high Reynolds number may be different from that of small scale flows.
