Morfodinâmica e fácies sedimentares do estuário dos Bons Sinais na zona das Gazelas

Abstract

The main objective of this study was to analyze the morphodynamic characteristics and sedimentary faces of the Bons Sinais estuary in the Gazelas zone. The work took place in three phases, the first phase of the field exit, second laboratory phase and third data processing. Laboratory analyzes were carried out at the Faculty of Agronomy and Forest Engineering in Maputo, where the texture of the collected samples was analyzed and the preliminary results were obtained in data forms related to the percentage of sand, silt and clay fraction. The data processing was done in the statistical package Microsoft Excel, where the tide data, current and topography and statistical parameters calculus were determined determining the standard deviation, mean, median, Skewness and Kurtoses, which culminated with the construction of curves the weight of the samples. The sedimentary balance in the estuary of the good signs in Gazelas is very influenced by hydrodynamics and anthropogenic actions and is higher in the time of the living tide than in the dead tide and yet the sedimentary balance does not behave uniformly in all phases. therefore, there is a higher flow at low tide compared to preamar and the most prevalent facies in Gazelas are lithosphacies from fine to very fine sand