Abstract
▪ Abstract Bedrock rivers set much of the relief structure of active orogens and dictate rates and patterns of denudation. Quantitative understanding of the role of climate-driven denudation in the evolution of unglaciated orogens depends first and foremost on knowledge of fluvial erosion processes and the factors that control incision rate. The results of intense research in the past decade are reviewed here, with the aim of highlighting remaining unknowns and suggesting fruitful avenues for further research. This review considers in turn (a) the occurrence and morphology of bedrock channels and their relation to tectonic setting; (b) the physical processes of fluvial incision into rock; and (c) models of river incision, their implications, and the field and laboratory data needed to test, refine, and extend them.
Highlights
[en] Analisys of longitudinal river profiles for the detection of geomorphological anomalies
We obtained by means of a LE ratio a linear correlation coefficient about R2≥0.95 (p
High correlations were found between a decrease of profile inclinations and regional flattening surfaces
Summary
Los movimientos tectónicos no pueden explicar por completo la evolución morfométrica de los perfiles de los ríos (Radoane et al, 2003; Monteiro et al, 2010; Demoulin, 2011), aunque tampoco se han desarrollado hipótesis de carácter universal de tipo geomorfológico o climático que justifiquen por completo tal afirmación (Allen, 2008; Strak et al, 2011; Scotti et al, 2014). Con este método práctico y sin costes económicos, los perfiles de los cursos fluviales de diferentes dimensiones pueden ser medidos entre dos puntos a lo largo de sus cauces. Desde este punto de vista, sería recomendable por tanto tener en cuenta estos cambios del perfil con objeto de calcular ajustes para cada área, y las diversas condiciones ambientales que puedan incidir. Los objetivos de este trabajo son: i) hallar las curvas de ajuste a los perfiles longitudinales en pequeñas cuencas de montaña, a partir del análisis de diversas redes de cuencas vertientes al Mar de Alborán, y valorar la aplicación de los modelos a cuencas mayores; ii) localizar, cuantificar y determinar las variaciones y anomalías geomorfológicas que se registran a lo largo de dichos perfiles fluviales
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