Tasas de acumulación reciente en los márgenes del estuario del Guadalquivir

Abstract

The Guadalquivir Estuary is located at center of the Cadiz Gulf. It is an estuary supplied by one of the longest rivers of Spain. The Guadalquivir estuarine channel extends from the town of Sevilla to its mouth in front of Sanlúcar de Barrameda (Cádiz), bordering Doñana National Park along its southeastern margin. Guadalquivir River has an average discharge of 185 m3/s, with a strong seasonal character. This estuarine zone is characterized by its mesotidal ran-ge, with a mean tidal amplitude of two meters. The channel margins mainly develop muddy facies with a clearly visible parallel lamina-tion. Water usually has a high concentration of suspended matter, being one of the most turbid estuaries in the world. The results (210Pb y 14C) supplied by this paper suggest a direct relation between the high concentrations of suspended matter and the high values of se-dimentation rates. These rates oscillate between 5 and 11 mm/year for subtidal and intertidal unvegetated environments.