Abstract
The characteristics of the current river channel of the Guadalquivir river and deposits of the terrace T4 ( + 6 m) near Andujar are described. The study of morphological parameters evidence that they are balanced; this indicates that morphology and channel pattern are contolled mainly by local causes. Changes in discharge and bedload are responsible for gradual variations of channel patterno In contrast, overflow causes sharp changes. A general displacement of the river course towards the S. and SW. was deduced from careful study of maps, air photographs, etc., corresponding to various dates. T4 ( + 6 m) terrace deposits exhibit 2 typical vertical sequences (called 1 and 2 respectively) of channel and flood-plain facies. A model of terrace growth is proposed which is domonated by point bar deposits.
Highlights
A general displacement of the river course towards the S. and SW. was deduced from careful study of maps, air photographs, etc., corresponding to various dates
Puede asimilarse a depósitos de relleno de canal abandonado producidos tras el cambio brusco del trazado del río, o bien a depósitos de canales secundarios situados sobre la barra de meandro, que aprovechan los surcos de la misma en épocas de crecida, aunque en este caso, el relleno se realiza de forma longitudinal
«A tentative classification of alluvial river channels»
Summary
Los métodos utilizados para clasificación de ríos se basan, fundamentalmente, en criterios geomorfológicos y sedimentológicos. Por lo general, el índice de sinuosidad del cauce activo y la presencia de uno o más de estos cauces, dando lugar a una clasificación, sin duda la más popular, que data de mediados de siglo (Leopold y Wolman, 1957 y Miall, 1978) y establece cuatro categorías de ríos: Meandriformes (meandering), entrelazados (braided), rectos (straight) y anastomosados ( anastomosing). Los criterios sedimentológicos incluyen otros factores diferentes, como son el modo de transporte del sedimento, las características del flujo, las secuencias generadas, etc., que dan lugar a nuevas clasificaciones, entre las cuales la más elaborada se debe a Schumm (1961, 1977), que indica su relación con las clasificaciones morfológicas y establece tres tipos: de carga de fondo (bed load), de carga mixta (mixed load) y de carga en suspensión (suspended load)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
