THEORETICAL METHOD OF SILT PROPAGATION FORM PREDICTION IN ESTUARIES AT UNSTEADY BASE EROSION LEVEL 

P.O.Baljyan, G.I.Karapetyan, A.A.Sarukhanyan, N.G.Hovumyan
(Armenia)

The work studies river-bed transformation processes occurring at rivers mouths. Solution of this problem is of an important theoretical and practical interest, for silt sedimentation in the costal zone by rising marks of the river bottom builds up favorable conditions for delta formation which is a serious danger for nearby located objects. For prediction of possible development of channel conditions on the basis of the developed mathematical model a method is suggested for calculation  of  parameters of stabilized channel transformations in case of the coastal mark rise at the mouth section.







LONGITUDINAL WAVES IN CHANNELS AND THEIR ACTION ON BANK SLOPES

Sh.Gagoshidze,  M.Lordkipanidze
(Georgia)

Alongshore waves are dominant in open river and maritime canals. For water area, from one side limited by arbitrarily sloped shore endlessly running deep into the sea, they were studied by Stocks, but due to significant mathematic difficulties for total depth canals the amount of accurate solutions is limited by just some private cases which are hardly applicable in practical use.

Some results of approximate solution of the problem about propagation of alongshore waves laying over the stationary flow in trapezoid canal are presented. The solution is based on the application of direct Galorkin-Kantorovich method in three-dimension linear equations for wave hydromechanics written in cylindrical coordinate system. The obtained solutions maintain the three-dimension structure of the waves over the shore slope and lead to the results easily applied in the design.