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Development and erosion in the Brazilian Amazon: A geochronological case study |
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| Authors: | Dr Bruce Forsberg Dr Jose Marcus Godoy Dr Reynaldo Victoria Dr Luiz Antonio Martinelli |
| Institution: | (1) Departamento de Ecologia, Instituto Nacional de Pesquisas da Amazonia, Caixa Postal 478, 69.011 Manaus, AM, Brazil;(2) Instituto de Radioproteçao e Dosimetria, DEPRA-CP 37025, 22700 Rio de Janeiro, RJ, Brazil;(3) Centro de Energia Nuclear na Agricultura, CP 96, 13400 Piracicaba, SP, Brazil |
| Abstract: | A 210Pb chronology of sedimentation in a small floodplain lake in the Jamari river basin (Rondonia, Brazil) provided insight into the relationship between development and erosion in the Brazilian Amazon. Positive correlations between increased sedimentation in the lake and levels of deforestation and mining in the Jamari basin suggested a major increase in erosion associated with these activities. This increase in erosion could diminish agricultural yields in the basin and significantly reduce the useful life of a hydro-electric plant recently built on the river. |
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