Published December 31, 2006 | Version v1
Journal article Open

APPORTS DES SYSTEMES D’INFORMATION GÉOGRAPHIQUES À LA PERCEPTION DES CHANGEMENTS MORPHODYNAMIQUES (1970-2000) DANS LE DELTA DU DANUBE. LE CAS DU BRAS DE SAINT-GEORGE. GIS USE FOR ASSESS ING MORPHODYNAMICAL CHANGES IN THE DANUBE DELTA. CASE STUDY : St. GEORGE DISTRIBUTARY (1970-2000)

Authors/Creators

  • 1. INCD GEOECOMAR, Rue Dimitrie Onciul, No 23-25, 024053, Bucarest, Roumanie,, UMR 6635, CEREGE-CNRS, Europôle Méditerranéen de l’Arbois, 13545, BP 80, Aix-en-Provence, Cedex 04
  • 2. UMR 6635, CEREGE-CNRS, Europôle Méditerranéen de l’Arbois, 13545, BP 80, Aix-en-Provence, Cedex 04
  • 3. INCD GEOECOMAR, Rue Dimitrie Onciul, No 23-25, 024053, Bucarest, Roumanie,

Description

Abstract. The paper describes the evolution of one distributary of the Danube Delta (the St. George distributary) over the last 30 years by use of topographic maps as well as aerial and satellite images transformed and georeferrenced in a geographic information system (GIS). By analysing a multitude of parameters the authors intend to assess the changes in channel and meanders morphology induced by human intervention in the drainage basin of the Danube River and in its delta in the early 80s. The anthropogenic changes (damming of the river, cut-offs of the distributary meanders within the delta area) have significantly altered the hydraulic and sediment dynamics in the distributary resulting in diminished migration of meander belts, occurence of longitudinal sand bars, bathymetric changes. The natural channels of meanders and the newly cut channels evolve differently, fundamentally changing the sediment transport processes.

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