JOAO DE OLIVEIRA
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Artigo IPEN-doc 17486 Aguas subterrâneas na avaliação de riscos ambientais e de saúde em Cananéia, Iguape e Ilha Comprida (SP)2011 - JESUS, S.C. de; OLIVEIRA, J.; BRAGA, E.S.Artigo IPEN-doc 14038 Isotope techniques for assessment of submarine groundwater discharge and coastal dynamics in Ubatuba coastal areas, Brazil2006 - OLIVEIRA, J.; ELISIO, A.C.R.; TEIXEIRA, W.E.; PERES, A.C.; BURNETT, W.C.; POVINEC, P.P.; SOMAYAJULU, B.L.K.; BRAGA, E.S.; FURTADO, V.V.Artigo IPEN-doc 11736 Seasonal variations of 222Rn and SGD fluxes to Ubatuba embayments, São Paulo2006 - OLIVEIRA, J.; COSTA, P.; BRAGA, E.S.We describe here an application of excess 222Rn to estimate submarine groundwater discharge in a series of small embayments of Ubatuba, São Paulo State, Brazil. Excess 222Rn inventories obtained in 11 vertical profiles varied from (3.3±1.1)·103 to (19±5)·103 dpm·m-2. The estimated total fluxes required to support the inventories varied from (0.6±0.2)·103 to (3.4±0.9)·103 dpm·m-2·d-1. Considering these results, the submarine groundwater discharge advective rates necessary to balance the sub-pycnocline fluxes calculated in Ubatuba embayments ranged from 0.06 to 1.9 cm·d-1. During the period of this investigation (from March/03 to May/2004), the highest 222Rn in excess inventories were observed late in the summer season (March). Taking into account all vertical profiles established, the relative variability was 67%. Although, if we consider only the fluxes determined in both Flamengo and Fortaleza embayments, the relative variation was 21%.