Width changes in a fluvial channel after silting by mud and debris flows: study in the Jacareí river - coast of Paraná, Brazil

• Autor(a) principal: Paz, Otacílio Lopes de Souza da
• Data de Publicação: 2022
• Outros Autores: Paula, Eduardo Vedor de
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista Cerrados (Montes Claros. Online)
• Texto Completo: https://www.periodicos.unimontes.br/index.php/cerrados/article/view/4133
• topic: Sensoriamento Remoto; Aeronave Remotamente Pilotada; Morfometria fluvial; Equilíbrio fluvial; Impactos ambientais; Remote sensing. Remotely Piloted Aircraft. Fluvial morphometry. River balance. Environmental impacts.; Detección remota. Aeronaves pilotadas a distancia. Morfometría fluvial. Equilibrio fluvial. Impactos ambientales.

The channel width can be affected by changes in the hydrological regime or by anthropic interventions. Debris and mud flows can result in channel silting, expanding its width, as exemplified in the process on the plains of the Jacareí River in 2011 (Paraná Coast). In this paper, we analyze changes in the width of the Jacareí River channel resulting from the silting up induced by an extreme event and also by the subsequent anthropic interventions. A methodological guide is proposed for comparative measurement of the width in GIS. The Jacareí River had significant changes in width in the analyzed period, divided in two stretches. In the stretch widened by silting up, there was a process of returning to equilibrium conditions before the system was disturbed by the 2011 event. In the stretch of the channel affected by anthropic interventions, the widths remained stable, probably due to the characteristics of the work carried out (opening and de-silting).