2019-09-092019-09-092006-04PEREIRA, Carla Tatiani do Carmo. Caracterização hidrogeoquímica do estuário do rio Curuçá (município de Curuçá – NE do Pará). Orientador: José Francisco da Fonseca Ramos. 2006. 125 f. Dissertação (Mestrado em Geologia e Geoquímica) – Centro de Geociências, Universidade Federal do Pará, Belém, 2006. Disponível em: http://repositorio.ufpa.br/jspui/handle/2011/11717. Acesso em:.https://repositorio.ufpa.br/handle/2011/11717The city of Curuçá is inserted in the Northeast of the State of Pará with an area of 676,3279 Km2. It presents a population of approximately 25.163 inhabitants that they live basically of the agriculture and fishes. Its relief is corporate predominantly of secondary forests and forests of fen, with latossolo yellow of average texture, laterite concretionary and indiscriminate ground of fen. Its geology presented to a large extent for the sediments of Barreiras Formation of Tertiary Age and for the unconsolidated sediments of Quaternary; the regional relief is formed for two units: Lowered plateaus of the Amazônia and the coast of rias. The present work was developed in the scope of the Project RECOS - Institute of the Milênio objectifying the hidrogeochemistry characterization of the estuary of the River Curuçá (City of Curuçá - Northeast of Pará), thus making possible, to verify the possible alterations related with the proximity of the localities of Curuçá and Abade. Eight campaigns had been carried through, with variations space and weather investigated through semimonthly samplings. The collections had been made in two distinct profiles, being that, each one of these were constituted of four (4) points of sampling, having thus totalized eight points distributed to the long one of estuary, being four in vulnerable places to pollution human being and four for control. The analyzed parameters to diagnosis the processes natural or possible alterations of the quality of the water had been: electric conductivity, salinity, temperature, transparency, pH, dissolved oxygen (DO), demand oxygen biochemist (DOB), suspended solids and dissolved inorganic nutrients. The analytical results of waters of the estuary of river Curuçá, had shown a considerable sazonal influence in some analyzed parameters. The temperature, in the dry periods is approximately 100C more raised of the one than in the ones of rain; pH throughout all the campaigns was presented alkaline varying around 7,50 the 7,90, except in the months of april/2003, july/2003 and march/2004, that in some points of sampling mainly P1 it verified acid values, however being these not significant. It is observed that the sazonal variation of the salinity to the long one of the months is significant, therefore, to the measure that the period if becomes dry more the salinity increases, where its bigger register was gotten in november/2003 (40,80 ‰), the same it occurs with the electric conductivity. It is perceived then that the influence of the rainfall and evaporation in these waters is bigger in the dry station, where we have entered greater of waters come from the ocean for the interior of the estuary The concentration of the dissolved oxygen varied of 3,37 the 8,42 mg/L, with a tax of corresponding saturation of 70,50 the 83,00 %, with a variation, mainly attributed to the local biological processes of consumption or photosynthetic production of oxygen. The DBO presented an accented variation very (0,53 a 3,18 mg/L), possibly had to the greater or minor increment of organic substance to the long one of the time The relation of the transparency with the amount of particles in suspension sample that these waters reveal little muddy with maximum value of the MPS (material particulado in suspension) being of 98,60 mg/L in january of 2004. The macronutrients analyzed presented values of the established standardization inside, being that the P1 point that would have greater influence of the human action which had its proximity of the urban area of Curuçá, was what presented the highest concentrations of these inorganic nutrients.Acesso AbertoEstuárioHidrogeoquímicaCuruçá - PADissertaçãoCNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIASGEOQUÍMICA E PETROLOGIA