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In West Africa, as in many other estuaries, enormous volumes of marine water are entering the continent. Fresh water discharge is very low, and it is commonly strongly linked to rainfall level. Some of these estuaries are inverse estuaries. During the Great Sahelian Drought (1968–1993), their hyperhaline feature was exacerbated. This paper aims to describe the evolution of the two main West African inverse estuaries, those of the Saloum River and the Casamance River, since the end of the drought. Water salinity measurements were carried out over three to five years according to the sites in order to document this evolution and to compare data with the historical ones collected during the long dry period at the end of 20th century. The results show that in both estuaries, the mean water salinity values have markedly decreased since the end of the drought. However, the Saloum estuary remains a totally inverse estuary, while for the Casamance River, the estuarine turbidity maximum (ETM) is the location of the salinity maximum, and it moves according to the seasons from a location 1–10 km downwards from the upstream estuary entry, during the dry season, to a location 40–70 km downwards from this point, during the rainy season. These observations fit with the functioning of the mangrove, the West African mangrove being among the few in the world that are markedly increasing since the beginning of the 1990s and the end of the dry period, as mangrove growth is favored by the relative salinity reduction. Finally, one of the inverse estuary behavior factors is the low fresh water incoming from the continent. The small area of the Casamance and Saloum basins (20,150 and 26,500 km² respectively) is to be compared with the basins of their two main neighbor basins, the Gambia River and the Senegal River, which provide significant fresh water discharge to their estuary.

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In Senegal, the prevalence of asthma has not yet been assessed. The socio-demographic, epidemiological and provenance characteristics of asthmatic patients consulted at the National Hospital University Center (CHNU) remain little known. This article contributes to the knowledge of the profile of asthmatic patients admitted to the CHNU. This was a retrospective, prospective and cross-sectional, analytical wise study combining the quantitative and qualitative approach which took place from January 1999 to august 2017 at the CHNU pulmonology clinic. The study of asthmatics category variable, were made up of housewives (24.8%), pupils and students (20.1%), traders (17.5%), bureaucrats (6.8%), health personnel (6%) and koranic teachers and teachers (3.8%). In addition, workers (3.8%), dressmakers (3.4%), hairdressers (3%), drivers (2.6%), farmers and ranchers (2.6%), mechanics and mechanics (1.3%), fishermen and sailors (1.3%), restaurateurs and restorers (1.3%), and others (1.7%). According to marital status, 54.3% were married, 42.7% were single and 3% were divorced. Among the 296 asthmatics, 250 resided in an urban Dakar environment. The history was summarized by the signs and symptoms of patients with cough (34%), nocturnal expiratory dyspnea (34%), sputum (18%) and asthma attacks (14%). The profile of asthmatic patients presents a young population with a female predominance.