1. Development and evaluation of hydraulic geometry relationships for large Brazilian river basins.
- Author
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Coelho, Clívia Dias, da Silva, Demetrius David, Moreira, Michel Castro, and Filizola, Naziano Pantoja
- Abstract
River cross-section characteristics are not available for many regions of the world, and they are generally expressed as hydraulic geometry (HG) relationships. These relationships usually represent average characteristics of a region, which can generate biased estimates in smaller basins. Therefore, to improve the representation of river channel geomorphological characteristics, the objective of this study was to use a large database of river cross-section geometries to refine HG relationships for five river basins in Brazil. HG relationships were developed for the entire basins and for hydraulically homogeneous regions, obtained through a geographical convenience method. The relationship between the coefficients of the geometric relationships and morphoclimatic characteristics was assessed, showing a trend between precipitation and slope and the coefficients of the depth relationships. The estimated bankfull width and depth values were also compared to observed data and global datasets, showing an improvement in estimates with the more refined HG relationships. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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