Abstract
Frequently, to assess the life expectancy of Brazilian reservoirs, bedload flux has been estimated by using formulas (e.g. the Einstein equations) or by assuming that bedload represents a fixed percentage of the suspended load. This study was carried out to characterize the bedload flux on the basalt scarps of southern Brazil. The bedload was measured over the course of 12 stormflows. The results demonstrated that the bedload flux-streamflow relationship was adequately described by a potential mathematical function. Bedload flux selectively transported particles smaller than D50 surface and subsurface bedstream sediments. When considering the bedload flux-streamflow relationship, the flux ranged from a minimum of 0.24 g m-1 s-1 for a streamflow of 0.53 m3 s-1 to a maximum of 44 g m-1 s-1 for a streamflow of 1.3 m3 s-1. The percentage of bedload/suspended load varied between <1% up to 60%, and this variation was strongly associated with peak flow.
Original language | English (US) |
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Title of host publication | Sediment Dynamics from the Summit to the Sea |
Editors | Samuel J. Bentley, Y. Jun Xu, Adrian L. Collins, Mike Stone, Mead A. Allison, Arthur J. Horowitz, Wayne D. Erskine, Valentin Golosov |
Publisher | Copernicus GmbH |
Pages | 185-191 |
Number of pages | 7 |
ISBN (Electronic) | 9781907161452 |
DOIs | |
State | Published - 2014 |
Externally published | Yes |
Event | International Symposium on Sediment Dynamics: From the Summit to the Sea, ICCE 2014 - New Orleans, United States Duration: Dec 11 2014 → Dec 14 2014 |
Publication series
Name | IAHS-AISH Proceedings and Reports |
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Volume | 367 |
ISSN (Print) | 0144-7815 |
Other
Other | International Symposium on Sediment Dynamics: From the Summit to the Sea, ICCE 2014 |
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Country/Territory | United States |
City | New Orleans |
Period | 12/11/14 → 12/14/14 |
Bibliographical note
Publisher Copyright:Copyright © 2014 IAHS Press.
Keywords
- Brazilian basalt scarps
- Maddock classification
- bedload
- hydropower
- reservoir life expectancy
- step-pool streams