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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Sediment management and morphodynamics : Suspended sediment transport characterization along the biobio river, chile
Suspended sediment transport characterization along the biobio river, chile
Author : DIEGO CAAMAÑO(1), EDWIN BEHRENS(2), ALBA MARTINEZ-RUIZ(3) & HERNÁN ALCAYAGA(4)
ABSTRACT
The Biob¨ªo fluvial system is one of the most important areas for economical developments in the Chile, and it has been
recently classified as one of the world¡¯s largest river systems strongly affected by fragmentation and change in flow
regime, primarily due to hydropower and irrigation. Remarkable research efforts have been focused on the Biob¨ªo, yet little
is known about the river sediment transport patterns and its response to natural and/or anthropogenic perturbations. This
study utilizes a power-law rating curve to assess the spatial and temporal variability of suspended sediment transport by
clustering and characterizing the data collected by the Chilean Ministry of Public Works. Results show highly variable
rating coefficients between seasons, and yearly analyses indicate patterns that are in coincidence with dams operations.
The different periods are marked and identified before and after the construction/operation of the dams, showing a rapid
response in the upper basin station and a minimum change on the lower part of the river. This suggests a strong
suspended sediment transport signal coming from the two main tributaries (i.e. Laja and Vergara Rivers). These results
help to better understand the river behavior in terms of sediment distribution and transport, and also means an
improvement when characterizing the phenomena through empirical expressions that, for example, could be used to feed
numerical models.
File Size : 3,773,835 bytes
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Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Sediment management and morphodynamics
Date Published : 18/08/2015
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