ANALYSIS OF MORPHOLOGICAL AND HYDROLOGICAL CHANGES IN THE CORRENTES RIVER

Autor:	Beatriz Lima de Paula Silva, Edward Lo, Aguinaldo Silva, Tayrine Pinho de Lima Fonseca, Edson Rodrigo dos Santos da Silva, Luciana Escalante Pereira, Maxwell da Rosa Oliveira
Rok vydání:	2018
Předmět:	Hydrology Watershed Hydroelectricity Meander Erosion Sediment sense organs Sinuosity Stage (hydrology) Geology Communication channel
Zdroj:	GEOGRAFIA. 42:9-25
ISSN:	1983-8700 0100-7912
Popis:	Meandering rivers have a number of features that differentiate them from rectilinear and anastomosing channels, such as the rapid change of course, which is the result of continuous adjustments of hydro-sedimentary factors. Studying these changes helps to inform on the potential future changes, and generates valuable data for landuse planning. This study aims to identify the morphological changes in the lower Correntes River between 1984 and 2016, and generate information that is currently scarce about the watershed. A temporal analysis of migrating meanders using remote sensing, literature search, and field work was conducted. This river is highly mobile with lateral and downstream migration, exhibiting a rectilinear channel tendency as shown by the decreased sinuosity between 1984 and 2016. This trend reflects channel adjustment in relation to hydro-sedimentary factors. Because the upstream hydroelectric dam retained sediment and enhanced flow velocity, erosion and meander migration increased. In addition to the channel modification, the dam caused observable changes to the river stage and discharge
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::eb28a2afa6ee77db59294d26fa78269c https://doi.org/10.5016/geografia.v42i3.13086 Zobrazit plný text záznamu