Author(s)

R. Khanbilvardi, B. Shteinman, V. Khazin & 0. 0zkurt

Abstract

Interaction of flow with mobile bottom in the river mouth R. ~hanbilvardi', B. shteinmanl, V. ~hazin' & 0. 0zkurt2 '~nternational Center for Water Resources and Environmental Research and Department of Civil Engineering, City College of C W USA "he Graduate Center and University Center of CUNY, USA Abstract In the contact zone "river-sea (lake)" we observe inertial jet flow. Such flows are characterized by the lack of influence on their motion of the banks and bottom, and also of gravity - due to flattening of the river jet up to a zero slope. Because of these circumstances, the structure of river turbulence is rapidly collapsing, and the length of turbulent eddies is diminishing. Our observations have shown that this diminishing of the eddies is accompanied by downsizing of bottom sand ripples, decreasing their motion rate, and, as a result, bed load along the jet flow is reducing and a river bar is forming. These processes come to an end at an average distance from the exit cross-section equa

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