Abstract
AbstractRiver channels, in general, have a concave longitudinal profile. However, some of them develop a convex longitudinal profile because discharge decreases downstream, losing transport capacity. The middle-low fluvial belt of the San Bartolomé River is developed in the eastern piedmont of the Sierra de Comechingones. This environment presents an undulating relief associated with basement blocks near the surface, covered by fluvial-aeolian sediments. This work shows the incidence of peri-mountain block distribution on the channel pattern, river cross-section and the longitudinal profile concavity along the San Bartolomé middle-low reach. The channel pattern, river cross-sections, river longitudinal profile, and peri-mountain block arrangements were analyzed by means of satellite images, aerial photographs, digital elevation models and fieldwork. Changes from a permanent hydrological regime to an ephemeral one downstream would be the cause of variability in geometric relationships and channel pattern, generating a middle reach dominated by aggradation. We found a clear correspondence between elevated morpho-structural blocks with a high sinuous incised fluvial belt and a concave longitudinal profile. On the other hand, depressed blocks are related to a low sinuous wide fluvial belt and a convex longitudinal profile, which show the influence of the peri-mountain blocks on the morphodynamics of this fluvial system.KeywordsPeri-mountain blocksMorphodynamicsSubsidenceAggradationConvexitySierra de Comechingones piedmontSierras de CórdobaArgentina
Sign-in/Register to access full text options 
Free) 
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 call
