2018-11-272018-11-272018-01-29CORRÊA, Artur Willen Ramos. Conectividade estuarina amazônica: um estudo de caso entre os rios Mojuim e Mocajuba. Orientador: Marcelo Rollnic. Coorientador: Iranilson Oliveira Silva. 2018. 75 f. Trabalho de Curso (Bacharelado em Oceanografia) - Faculdade de Oceanografia, Instituto de Geociências, Universidade Federal do Pará, Belém, 2018. Disponível em: http://bdm.ufpa.br/jspui/handle/prefix/852. Acesso em:.http://bdm.ufpa.br/jspui/handle/prefix/852This study carried out the collection of oceanographic data in a tidal channel that connects the estuaries of the Mojuim and Mocajuba rivers, to the east of the Amazonian coastal zone, to describe the connectivity of this region. Seasonal field campaigns (March/rainy and November/dry) were carried out in spring tide, collecting data simultaneously in two stations at the tidal channel. The Station 1 (E1, -0.770017 ° -48.000550 °) was installed in the connection with the Mojuim River and the Station 2 (E2, -0.779450 ° -47.958600 °) in the connection with Mocajuba River. CTD (Conductive, Temperature, Depht) pressure and conductivity sensors and multiparameter probes were used to measure physicochemical properties of water (temperature, pH, dissolved oxygen, oxygen saturation, total dissolved solids, turbidity and salinity) and surface and bottom water was collected for suspended solid concentration (SSC), quantified by the gravimetric method. The hydrodynamics was described using an ADCP (Acoustic Doppler Current Profiler) within the channel and a current meter at both stations. CTD data in E1 revealed salinity ranging from 0.8 to 11.3 and maximum tidal height of 3.86 m in the rainy period. In the dry period, there were maximum tidal heights at E1 of 5.06 m and at E2 of 4.82 m, with ebb phase duration higher than the flood tide and the tidal effect starting at E2. The salinity in E1 oscillated as a function of tide from 22 to 30.8 and at E2, there was a maximum of 30.9 in the flood, which decreases rapidly in the low tide with a minimum of 26.9. In both stations, predominant direction of the current during the flood enters the tidal channel reversing its direction in the ebb to exit the channel. However, within the main tidal channel there is a secondary channel that contributes significantly to the drainage and hidrodinamic of the system. The depth did not regulate significant changes in the physicochemical properties analyzed, seasonality being the main factor in this process. In the rainy period, the highest concentrations of SSC occurred in the flood with averages of 593.77 mg / L at E1 and 515.69 mg / L at E2. However, in the dry period, the highest concentrations occurred in the ebb with averages of 170.91 mg / L at E1 and 87.11 mg / L at E2. When analyzing the pH and the salinity, a fluvial forcing is observed mainly in the estuary of the Mojuim river while in the estuary of Mocajuba river, there was predominantly a marine influence and this aspect reflects in the connectivity between them. The Salinity is a fundamental property when analyzing the connectivity between estuaries considering that, possibly, less saline waters of the Mojuim River contribute in Mocajuba River mainly in the ebb through the channel studied.Acesso AbertoHidrologiaEstuáriosRio Mojuim - PARio Mocajuba - PAAmazônia BrasileiraCNPQ::CIENCIAS EXATAS E DA TERRA::OCEANOGRAFIATrabalho de Curso - Graduação - Monografia