EL RÉGIMEN FLUVIOMÉTRICO DEL RÍO MAGDALENA Y SU IMPORTANCIA PARA LA CIÉNAGA GRANDE DE SANTA MARTA

Abstract

Long standing water-gauge data recorded at the lower course of the Magdalena river (Colombia), show every 6 to 7 year extreme high and low water levels. These rhythmical changes could be proved highly significant with Student,s t-test. Furthermore, these oscillations of waterlevels could be correlated with long-term changes of rainfalls in the upper hydrographic basin of *) El primer autor quiere dedicar el presente trabajo y expresar sus sinceros agradecimientos a todas entidades y personas en Colombia, que por su ayuda facilitaron su labor como Director del Instituto Colombo-Alemán, durante nueve años. the Magdalena. The extreme high waters cause cyclical floodings of the Ciénaga Grande de Santa Marta, a brackish water lagoon communicated with the Magdalena, and thus the cyclical extinction of the oyster Crassostrea rhizophorae, which is of considerable economic importance.