Análisis de la evolución de la morfología fluvial en un tramo del río Carampangue (2012-2023).
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Date
2025
Journal Title
Journal ISSN
Volume Title
Publisher
Universidad de Concepción
Abstract
Esta investigación analiza los cambios morfológicos de un tramo del río Carampangue entre 2012 y 2023, enfocándose en la evolución del canal activo, las unidades geomorfológicas del cauce, como islas y barras, y su forma de planta. El objetivo es caracterizar el comportamiento del río mediante métricas físicas.
La metodología empleada es de carácter multitemporal, e integra sistemas de información geográfica (SIG), fotointerpretación de imágenes satelitales y el marco de desagregación y agregación del corredor fluvial mediante la herramienta South Rivers Toolbox. Se extrajeron métricas físicas, como sinuosidad del cauce, número de canales, ancho del canal activo y de la llanura de inundación, formas de planta y características de las islas y barras en el cauce, a lo largo de todo el tramo de estudio.
Los resultados muestran una evolución significativa del cauce hacia un mayor dinamismo, evidenciado por el aumento de barras sedimentarias, la reducción del número de islas fluviales, la disminución del área del canal activo y una tendencia hacia formas de planta más complejas. Tales transformaciones sugieren que el cauce está atravesando un proceso de ajuste. La caracterización geomorfológica multitemporal obtenida en este estudio contribuye a una mejor comprensión de la dinámica fluvial en paisajes en transformación, como la cordillera de Nahuelbuta, y aporta herramientas valiosas para su gestión.
This research analyzes the morphological changes of a reach of the Carampangue River between 2012 and 2023, focusing on the evolution of the active channel, geomorphological units such as islands and bars, and channel planform. The objective is to characterize the river’s behavior through physical metrics. The methodology applied is multitemporal in nature and integrates geographic information systems (GIS), satellite image photointerpretation, and the framework of fluvial corridor segmentation and aggregation using the South Rivers Toolbox. Physical metrics were extracted, including channel sinuosity, number of channels, active channel and floodplain width, planform types, and characteristics of islands and bars along the entire study reach. The results show a significant evolution of the channel towards greater dynamism, evidenced by the increase in sedimentary bars, the reduction in the number of fluvial islands, the decrease in active channel area, and a trend towards more complex planform patterns. Such transformations suggest that the channel is undergoing an adjustment process. The multitemporal geomorphological characterization obtained in this study contributes to a better understanding of fluvial dynamics in transforming landscapes, such as the Nahuelbuta Range, and provides valuable tools for river management.
This research analyzes the morphological changes of a reach of the Carampangue River between 2012 and 2023, focusing on the evolution of the active channel, geomorphological units such as islands and bars, and channel planform. The objective is to characterize the river’s behavior through physical metrics. The methodology applied is multitemporal in nature and integrates geographic information systems (GIS), satellite image photointerpretation, and the framework of fluvial corridor segmentation and aggregation using the South Rivers Toolbox. Physical metrics were extracted, including channel sinuosity, number of channels, active channel and floodplain width, planform types, and characteristics of islands and bars along the entire study reach. The results show a significant evolution of the channel towards greater dynamism, evidenced by the increase in sedimentary bars, the reduction in the number of fluvial islands, the decrease in active channel area, and a trend towards more complex planform patterns. Such transformations suggest that the channel is undergoing an adjustment process. The multitemporal geomorphological characterization obtained in this study contributes to a better understanding of fluvial dynamics in transforming landscapes, such as the Nahuelbuta Range, and provides valuable tools for river management.
Description
Tesis presentada para optar al título de Geógrafo/a.
Keywords
Geomorfología, Cauce de los ríos, Ríos Chile