Summary
Rational development of sea coasts and the continental shelf presents a major problem of nature-protection within the zone of a sea basin in conjunction with the sea coast. Investigations have proved that engineering geological conditions of the Caucasian Black Sea-coast, recent geological processes and, therefore, measures of coast stabilization are predetermined by the latest geological history and neotectonics, hydrodynamics and lithodynamics, submarine canyons, and man's engineering activity. Engineering geological conditions of the Black Sea shelf within the Caucasus boundaries are controlled by Quaternary neotectonic development of the framing structures of the Great Caucasus Southern Slope, the Kolkhety depression and the mountain-folded structure of the Minor Caucasus. Processes of current lithodynamics are largely dependent on longshore detrital flows. The major part of the latter, of great competence, augment the littoral regions including the shelf, thus providing for stability of extensive coastal areas. The remaining part is interrupted by natural (zones of abrasive anticlines) and artificial (harbours, submarine works) structures, passes out into deeper water and into the submarine canyons, thus causing a detritus deficit and waste of valuable seaside areas. Engineering geological investigations during the last decade have enabled the main recommendations aimed at stabilization of the Caucasian Black-Sea-side to be made.
Résumé
L'aménagement rationnel du littoral et de la plate-forme continentale est un important problème de protection de la nature dans la zone côtière. Les recherches ont confirmé que les principaux facteurs qui déterminent les conditions géotechniques sont les processus géologiques actuels dont l'évaluation doit permettre la stabilisation de la zone littorale Caucasienne de la Mer Noire: histoire géologique actuelle et néotectonique; hydrodynamique et lithodynamique, canons sous-marins, influence de l'activité de l'homme. Les conditions géotechniques de la plate-forme continentale de la Mer Noire voisine du Caucase sont affectées par la néotectonique quaternaire sur le versant Sud du Grand Caucase et dans la dépression de Colchide. Le processus lithodynamique actuel est déterminé en grande partie par lécoulement des alluvions le long de la côte. Une grande partie des alluvions alimente la zone littorale, mais l'autre partie des alluvions est arrêtée par des barrières naturelles et artificielles ou tombe au fond de la mer et dans les canons sous-marins; il en résulte un perte d'alluvions qui manquent au territoire littoral. La réalisation des recherches géotechniques ces dix dernières années a permis de formuler des recommandations essentielles pour la stabilisation de la côte Caucasienne de la Mer Noirc.
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Academy of Sciences of Georgian SSR, Sector of Hydrogeology & Engineering Geology, 52, Rustaveli av., Tbilisi 380008, USSR
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Buachidze, J.M., Djandjgava, C.I. Engineering geological evaluation of current geological processes on the Caucasian black sea shelf aiming at rational coast development. Bulletin of the International Association of Engineering Geology 15, 13–16 (1977). https://doi.org/10.1007/BF02592635
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DOI: https://doi.org/10.1007/BF02592635