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Modeling the effects of land cover change on sediment concentrations in a gold-mined Amazonian basin

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Abstract

Land use/land cover change (LUCC) combined with gold mining activity (GMA) have reportedly affected the water quality of Amazonian rivers by intensifying surface soil erosion and increasing rivers’ sediment concentration (SC). However, the role of LUCC on river siltation in comparison to that caused by GMA has not been assessed, and predictions of SC in the rivers accounting for future LUCC are scarce. This study applied a sediment modeling approach on Crepori Basin, located at eastern Amazon Basin, to simulate the impacts of past and future LUCC on SC in the river, comparing their impacts to those caused by GMA. Between 1973 and 2012, the expansion of deforested areas in the region had increased sheet erosion-driven SC in the river, especially during the high-water season, by up to 73.3%. LUCC projections for 2050 suggest future increases in sheet erosion-driven SC during the high-water season by more than three times of that caused by the land cover scenario of 1998–2012. Comparison between SC driven by sheet erosion to that caused by GMA has also shown that during the high-water and the low-water seasons, respectively, only about 14% and 6% of the total SC in the Crepori River resulted from laminar soil erosion, with the remaining proportion resulting from GMA.

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  • 04 July 2019

    The article which was recently published contained error. The second given names “Andrade” and “de Lucia” were captured as particles. Given in this article is the correct naming of authors.

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Funding

This study is supported by the following: the Brazilian National Council for Scientific and Technological Development (CNPq) for the scholarship (131453/2015-7); the Global Affairs Canada, for the Emerging Leaders in the Americas Program (ELAP); the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES, Brazil); and the Instituto Tecnológico da Vale (ITV, Brazil) (15024016001P1) for post-PhD fellowship.

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Correspondence to Camila Andrade Abe.

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Editor: Sarah Gergel

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The original version of this article was revised: The article which was recently published contained error. The second given names “Andrade” and “de Lucia” were captured as particles. Given in this article is the correct naming of authors.

Appendix. Validation of land cover maps

Appendix. Validation of land cover maps

Table 2 Confusion matrix of 1998 land cover map
Table 3 Confusion matrix of 2003 land cover map
Table 4 Confusion matrix of 2010 land cover map

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Abe, C.A., Lobo, F.L., Novo, E.M.L.d.M. et al. Modeling the effects of land cover change on sediment concentrations in a gold-mined Amazonian basin. Reg Environ Change 19, 1801–1813 (2019). https://doi.org/10.1007/s10113-019-01513-8

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  • DOI: https://doi.org/10.1007/s10113-019-01513-8

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