Estudo de agitação marítima a sul do rio Save

Abstract

The disturbance of the sea surface generates waves that propagate from the point where they are produced. point that it is produced, carry energy, linear momentum but do not carry matter. This work studies sea disturbance south of the Save do Moçambique River as a way to This work studies the sea waves south of the Save do Moçambique River as a way to contribute to the mitigation of erosion problems and sediment deposition Its knowledge is essential for the design of protection structures. The region for the study corresponds to the entire length of the coast south of the Save River in Mozambique which is constituted by the coastal regions of the provinces of Maputo Gaza and Inhambane provinces. The wind regime is important when we proceed to an analysis of the agitation climate agitation, because it is by wind action that waves are formed on the sea surface. Were wind data from the MERRA-2 assimilation model were used for the generation of of sea surface wave data series. The annual average wind speeds winds vary between 5 m/s to 6 m/s in the study region. The weibull, log-Normal and Gumbel distributions are candidates for extrapolation of wave height as a function of return period but only the log- Normal and Gumbel distributions present the best fit. The predominant wave direction at Inhambane is SW and SSW, for Gaza it is SSE- SE and Maputo is SE-SSE and NNE-NE. Wave heights vary from 0 to 1.5 meters at Inhambane and Maputo. from 0 to 1.5 meters in all coastal zone, in some years there are peaks of wave heights that reach up to 4 meters.