{"references": ["Anastasiu N., Jipa D., 1983. Texturi \u015fi structuri sedimentare. Editura Tehnic\u0103", "Bucure\u015fti.", "Folk R. L., Ward W. C., 1957. Brazos River bar, a study in the significance", "of grain size parameters. Jour. Sed. Petrology, 27/1.", "Gaspar ini N. M, Tucker G. E., Bra s R. L.,1999. Downstream fining through", "selective particle sorting in an equilibrium drainage network.", "Geology; 12, p. 1079-1082.", "Mih\u0103ilescu N., et al. 1981-1989. Studiul sedimentologic - mineralogic", "al aluviunior Dun\u0103rii \u015fi principalilor afluen\u0163i. Rapoarte Arhiva", "Inst. de Geol. \u015fi Geofiz.", "Oaie Gh., Secr ieru D., Szobotka St., Fulga C., Stanic\u0103 A. 2005. Danube river:", "sedimentological, mineralogical and geochemical characteristics", "of the bottom sediments. GeoEcoMarina, 12, 77-85.", "Panin, N., Oaie, Gh., Gomoiu, M.T., Szobotka, St., Secr ieru, D., Cra iu, C., Stanica A., Mihaila,", "E., Rada n, S., Fulga , C. Danube research programme, European River-", "Ocean System Project (EROS 2000), 1995-1996, Arhiva GEOECOMAR.", "Paola C., Par ker G., Seal R., Wilcock P. R., 1992. Downstream fining by", "selective deposition in laboratory flume. Science, 258, p. 1757-", "1760.", "Par ker G., 1991. Selective sorting and abrasion of river gravel. Journal", "of Hydraulic Engineering , 17, p. 131-149 .", "Passega R., 1964. Grain size representation by CM patterns as a geological", "tool. Jour. Sed. Petrology, 34/4.", "Pizzuto J. E., 1995. Down stream fining a network of gravel bedded", "rivers. Water Resources Research. 31, p. 753 -759.", "Visher G. S., 1969. Grain size distribution and depositional processes.", "Jour. Sed. Petrology, 39, p. 1074 -1016."]}

Abstract. The paper is based on grain size analyses as well as on the macroscopic lithologic description of a large number of samples collected from the bottom of the Danube. Unlike previous papers on sedimentology, which were limited to the textural characterisation of sediments from the various sectors of the Danube, this paper attempts a new approach of the sediment dynamics. The interpretation of histograms, of cumulative curves or of the Passega diagram is used in the attempt to explain the dynamic and genetic reasons for the presence of a particular type of sediment in locations characterised by different environmental energy conditions.