Ways to Solve Geomorphological Problems in the Black Sea Regions of Georgia Using Innovative Technologies

Abstract

The article proposes an innovative technology for protecting coastal areas from erosion processes, which is not approved in Georgia. New method is based on the use of underwater barriers (geotubes) from geotextile pipes filled with sand. In the case of  using several underwater geotubes, an erosion site in the Black Sea coastal zone of the city of Poti, located to the south from the runoff of the "city channel" of the Rioni River, was considered. Geotubes are located along the coast. After geotubes are run over by the waves, to determine the types of water circulations formed in the coastal zone, the analytical method is used. With 2-cell circulation, the shore is erosive, and with 4-cell circulation it is accretionary. A system of equations is obtained. The numerical solution of the system determines the parameters of the location of geotubes when the morphological reaction of  Poti coast is accretionary. The  effect on the types of coastal reaction of the length of geotubes, their distance from the coast, intervals between geotubes, wave heights and changes in the coefficient of lateral water retention, is studied. As a result, there have been established the parameters of geotubes, after the placement of which in the sea, the coast will be protected from leaching, and the coastal zone will increase.