RESUSPENSION AND SEDIMENTATION OF PARTICLES FROM A SEDIMENT BED BY TURBULENT JETS

An experimental study was carried out to investigate the resuspension of heavy particles of a sediment bed by axi-symmetric turbulent jets i ssuing from below. The case of point jets and loosely-held monodispers ed particles was considered, in particular, the cases of a single jet and an array of jets located in the intersection points of a square gr id. The aim was to map the flow field and the nature of sediment distr ibution as a function of governing parameters and to parameterize sali ent observables such as the maximum height of rise of sediments. The r esults were extrapolated to study sediment resuspension in karstic lak es, especially lake Banyoles located in Catalonia, northeastern Spain.