2026-10-11T18:23:04Z https://api.figshare.com/v2/oai

oai:figshare.com:article/33833121 2026-09-16T08:14:54Z category_15 category_19 category_21 category_24 category_272 category_873 category_39 category_69 portal_87 item_type_3 month_year_09_2026

Salinity of Senegalese phreatic aquifers: the role of the geomorphology? Luc Descroix (24965655) Souleymane Niang (24965658) Waly Faye (24965661) Lorenzo Spadini (2443288) Oumar Marega (24965664) Jean-Pierre Vandervaere (24965667) Olivier Grunberger (24965670) Céline Duwig (24965673) Sylvie Paméla Manga (24965676) Marie-Jeanne Senghor (24965679) Yancouba Sané (24965682) Ange Bouramanding Diedhiou (24965685) Yasmin Bouaïta (24965688) Ababacar Fall (24965691) Laurence Fleury (404025) Jean-Louis Rajot (24965694) Didier Orange (14054386) Olivier Ruë (24965697) Neuroscience Pharmacology Biotechnology Evolutionary Biology Environmental Sciences not elsewhere classified Chemical Sciences not elsewhere classified Ecology Inorganic Chemistry groundwater salinity Senegal dunes/interdunes <p>Salinity is a common feature in amphibious environments. However, in Senegal (West Africa), elevated salinity levels are observed in groundwater hundreds of kilometres inland from the coastline – far beyond the marine influence. This raises questions about the origin of the salinity, decoupled from seawater intrusion. A spatial alignment of high (and, conversely, low) salinity values – parallel to a dune system – suggests a potential link to these aeolian formations. Field observations in four distinct regions of northwestern Senegal reveal sharp salinity contrasts between dunes and adjacent interdune depressions, even at scales of just a few hundred metres. Electrical conductivity (EC) values can shift abruptly from low (EC < 0.5 mS/cm) to high (EC > 5 mS/cm). The findings, reinforced by a principal component analysis based on data from over 500 wells, support a geomorphological hypothesis to explain the spatial distribution of salinity, highlighting the influence of palaeoenvironmental features on present-day hydrogeochemistry.</p> 2026-09-16T08:14:54Z Dataset Dataset 10.6084/m9.figshare.33833121.v1 https://figshare.com/articles/dataset/Salinity_of_Senegalese_phreatic_aquifers_the_role_of_the_geomorphology_/33833121 CC BY 4.0