Sediment origin and budget in Sepetiba Bay (Brazil) - an approach based on multielemental analysis
| Autor: | Christovam Barcellos, S. Ceradini, L. D. de Lacerda |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Hydrology
geography geography.geographical_feature_category Terrigenous sediment Partículas - Suspensão General Engineering Sediment Flux Estuary Sedimentation Particulate suspension Spatial distribution Oceanography Sedimentação Estuário Earth and Planetary Sciences (miscellaneous) General Earth and Planetary Sciences Environmental Chemistry Estuaries Bay Sediment transport Geology General Environmental Science Water Science and Technology |
| Zdroj: | Repositório Institucional da Universidade Federal do Ceará (UFC) Universidade Federal do Ceará (UFC) instacron:UFC |
| ISSN: | 1432-0495 0943-0105 |
| DOI: | 10.1007/s002540050208 |
| Popis: | Sediment origin and transport were de- termined in a shallow 447 km 2 coastal lagoon in Brazil, using the distribution of major elements in bottom and suspended sediments. Applying multi- variate analysis, the sum of normalized concentra- tions of Ti, Fe, and Al in sediments was selected to trace the terrigenous influence in bottom sedi- ments, whereas Ca, Si, and K were used as indica- tors of marine influence. Sepetiba Bay bottom sedi- ments are dominated by up to 80% terrigenous in- puts. The open bay sediments are enriched in P, Mg, K, and Ca because of the intensive water co- lumn primary production. The inner bay forms an independent circulation cell with a predominance of terrigenous sediments. The results suggest a long residence time for particles in the bay, demon- strated by the magnitude of resuspension flux com- pared to the total sediment input to the bay. |
| Databáze: | OpenAIRE |
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