Grau de estratificação na coluna de água da costa leste da Tanzânia

Abstract

Several authors have shown that the mixing and stratification processes of a water column are influenced by surface water heating, tidal currents, river discharges, wind speed, or even by the depth and topography of the bottom, which conditions the dynamics of nutrients influencing the primary productivity of the region. The objective of this work is to study the stratified degree of the water column of the east coast of Tanzania, and this was determined based on the temperature, salinity and density data measured on days 4 and 5 of November 2017.The (A) with the largest and (C) with the lowest, corresponding to the mean anomalies of 3762.535431 and -2177.12 Jm-3 respectively. The maximum and minimum times required to mix the water column were recorded at points (A and D), with 16.36709 and 1.54464 days respectively. In summary, according to the values of potential energy anomaly, there was a decrease of anomaly with the depth, and it is assumed that the factor that most influenced the distribution of the stratification in this region was the fluvial discharge and could also be influenced by the tide and wind due to its low energy available to mix the water column. And for the time of mixing it is presumed that the factor that influenced the most was the tide, since it presents time very reduced in relation to the wind.