Fialho Nehama

Fialho Nehama
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Eduardo Mondlane University · School of Marine and Coastal Sciences

PhD

About

28
Publications
13,082
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106
Citations

Publications

Publications (28)
Article
Transitioning lagoon-barrier systems and coastal transgressive dunes offer the valuable opportunity to correlate their formation and interactions with seasonal dry and wet climate conditions, stepped relative sea-level rise of ~3.5 m, and sediment supply at various scales. This manuscript examines the Holocene sea level changes and recent climate c...
Article
The Zambezi River plume constitutes a sizable feature in the horizontal distribution of both surface salinity and suspended sediments, and it spreads both downstream and upstream, influencing substantially the coastal ecosystems. Here we present the results of several numerical experiments conducted using the Regional Oceanic Modeling System, to in...
Article
Full-text available
Monthly composites of remote sensing reflectance at 555 nm wavelength (Rrs555) from ocean color imagery of the MODIS sensor onboard the Aqua platform were used to characterize the spatial and temporal variability of coastal plume in the Sofala Bank and its relation to river discharge, local rainfall, and wind speed. To achieve the objective, maps o...
Chapter
The oceans loom large in our imaginations as ever fascinating, ever immense, ever mysterious, and at times, inhospitable. Yet, how the oceans function and carry heat, salt, freshwater, goods, and services around the globe is a fundamental part of what makes our world go round. Here, we introduce readers to the underlying principles governing what d...
Article
Full-text available
Satellite altimetry data provide a solution to the lack of in situ tide gauge data, which are essential for comprehending various marine processes worldwide. In the present study, we seek to validate ALES-retrieved sea-level data against tide gauge observations from four ground stations on the coast of Mozambique. The approach consisted of extracti...
Book
Full-text available
A thorough exploration of the fascinating evolution of tides through the Earth’s history and their impacts on the Earth Did you know that the size of the full moon in the night sky is determined by how the continents have been arranged on Earth throughout its history? This is indeed the case, because the tides are largely controlled by the size of...
Thesis
A origem e a evolução dos depósitos eólicos no litoral dependem essencialmente da actuação de processos geológicos, oceanográficos e climáticos. A actuação destes processos, quando associados ao regime de ventos com velocidades superiores a 5.0 m/s que sopra na zona intermaré, tem a capacidade de mobilizar os sedimentos da superfície da praia e tra...
Article
Many studies around the world have found that tidal dynamics control the transport of suspended sediments in estuaries, as well as their relationship with runoff discharges and bathymetry morphology. This manuscript examines tidal impact on suspended sediments in the Macuse estuary in Mozambique, southern Africa. Data was collected at 42 stations,...
Article
Full-text available
O presente trabalho consiste no estudo da mecânica do transporte de sedimentos em suspensao no estuario do rio Macuse em Mocambique, costa sudeste Africana. Os procedimentos metodologicos basearam-se em levantamentos geomorfologicos e oceanograficos definidos em 42 estacoes devidamente georreferenciadas. Realizou-se medicoes de correntes de mares i...
Article
Full-text available
The Sofala Bank, a wide shelf located along the central coast of Mozambique, hosts tides with high amplitudes. The Regional Ocean Modelling System (ROMS) was used to analyse the tidal currents on the bank and to investigate their effects on the stratification and generation of tidal fronts. During spring tides, barotropic tidal currents with maximu...
Chapter
The occurrence of extreme climate events in Mozambique constitutes a great barrier to swift sustainable economic development due to associated human and material damages. As a result, the population lives in a situation of threat and instability. The most vulnerable societies in Mozambique are those inhabiting settling areas along coastal or river...
Chapter
Full-text available
The occurrence of extreme climate events in Mozambique constitutes a great barrier to swift sustainable economic development due to associated human and material damages. As a result, the population lives in a situation of threat and instability. The most vulnerable societies in Mozambique are those inhabiting settling areas along coastal or river...
Article
A model for the Zambezi River plume, the largest on the Indian Ocean coast of Africa, is presented and the results of experiments with different discharges and wind forcings are analysed. Although the river plays an important role in the southern African economy through power generation on large dams, artisanal fisheries, and frequent flooding even...
Article
Full-text available
Hydrological data collected between 2003 and 2007 were analysed in order to describe the water masses of the Sofala Bank in Mozambique Channel, a region under the influence of outflow from the Zambezi River. The data analysis consisted in the visual inspection of temperature and salinity combined with the analysis of variance for unbalanced data. F...
Conference Paper
Full-text available
This study consisted in describing the propagation of the tidal wave along the Bons Sinais Estuary in Zambezia province. Tides were predicted at the Mouth and confluence of the estuary, from the sea level heights recorded between July 8th to August 31st, 2011, as well as data from 1995 collected at Port of Quelimane using ordinary tide gauges. 35 a...
Thesis
Full-text available
O estuário de Macuse constitui um meio de navegação fluvial considerado extremamente importante pelo seu potencial das águas pouco profundas. Localiza-se estrategicamente na zona centro de Moçambique podendo servir para o desenvolvimento de várias actividades de exportação e importação de mercadorias de grande impacto económico na Província da Zamb...
Article
Full-text available
In this paper, hydrographic data collected in the vicinity of the Zambezi River plume between 2004 and 2007 is discussed alongside historical data to infer the plume morphology. The sampling plan called for the establishment of 73 CTD stations that were interspersed with sampling of shrimp recruitment. Satellite-derived wind speed and river dischar...
Article
Full-text available
Understanding the dynamics of the coastal oceans is important for managing coastal ecosystems, and hence for protecting lives and planning sustainable development. Among other countries in the southwest Indian Ocean, Mozambique has a greater number of environmental problems to solve. These problems include the landing of tropical cyclones1 along th...
Thesis
The Zambezi River constitutes an important source of freshwater to the Sofala Bank in the western Mozambique Channel, where it is believed that the outflow from the river influences the secondary production of coastal waters. Observational data is analyzed alongside simulation outputs to describe the main features of the Zambezi River plume, and it...
Thesis
Full-text available
Freshwater discharges from river runoff into the ocean have an important influence on the dynamics of many coastal regions. The plumes resulting from the encounter between fresh and saline waters have a variety of impacts, including changes in the availability of biological resources. Although there have been several general studies on the plume dy...
Thesis
Full-text available
Neste trabalho foram analisadas as marés que ocorrem na região a frente da Estação de Biologia Marinha da Inhaca, com o objectivo de dar um contributo ao estudo da predição de marés em Moçambique. O trabalho consistiu em predizer marés usando dois métodos que diferem no programa usado. O primeiro método foi o da análise harmónica clássica em pacote...

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