Estudo comparativo da distribuição granulométrica de sedimentos da praia do Madal e Zalala-Quelimane, Zambézia

Abstract

This study aims to Knowthe Grain-size Distribution of Sediments ofMadal Beach and Zalala. The data analyzed were obtained in two field trips, all carried out during the live tide phase, which consisted in measuring the velocities of wave currents, tidal amplitudes and sediment collection. The sediment samples were analyzed in the Sedimentology Laboratory of the UEM in the Department of Geology, where the neutralization method was applied by 30% HCl and the sample was allowed to settle for 24 hours, followed by the washing of the sediments using distilled water for the elimination of carbonates. In a greenhouse the samples were dried for 24 hours and the final weight was then extracted. The appropriate screens were selected to analyze the sediments of the beach nature. However, the retained weights in each sieve were used to construct the simple and convoluted frequency curves. However, the grain size parameters were determined in the determination of the mean, standard deviation, asymmetry and angularity, thus allowing the description of sediment characteristics on both beaches.