Hydrochemistry and Evolution of Water Quality in a Context of Aridity and Increasing Agriculture in Three River Sub-Basins of Santiago Island (Cape Verde)
In regions under development and facing recurrent droughts, increasing the area of irrigated agriculture may create additional disruption in water resources management. The present study was focused on three river sub-basins with the highest agricultural intensity (S. Miguel, Ribeira Seca and S. Dom...
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| Language: | English |
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MDPI AG
2021-06-01
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| Series: | Geosciences |
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| Online Access: | https://www.mdpi.com/2076-3263/11/6/263 |
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| author | Nemias Gonçalves Teresa Valente Jorge Pamplona Isabel Margarida Horta Ribeiro Antunes |
| author_facet | Nemias Gonçalves Teresa Valente Jorge Pamplona Isabel Margarida Horta Ribeiro Antunes |
| author_sort | Nemias Gonçalves |
| collection | DOAJ |
| description | In regions under development and facing recurrent droughts, increasing the area of irrigated agriculture may create additional disruption in water resources management. The present study was focused on three river sub-basins with the highest agricultural intensity (S. Miguel, Ribeira Seca and S. Domingos) in Santiago Island (Cape Verde). Sets of wells were selected to evaluate the influence of salinization and agriculture practices on the hydrochemistry. This assessment was performed by using data from the bibliography (2003) and a recent campaign (2016). The water chemistry indicates lower mineralization in the S. Miguel sub-basin. Nitrates and nitrites, typically associated with diffuse pollution, are present in all sub-basins, but with varying patterns. Additionally, sodium chloride waters occur in all the three sub-basins, especially those closest to the coastline. In turn, a bicarbonate-magnesium facies was identified in S. Domingos, at the furthest point from the coast, indicating a geological control. The comparison between the two periods suggests a decrease in water quality. The rising extension of the irrigation area associated with aridity should intensify the already observed soil salinization. Thus, the present review highlights the strategic importance of water monitoring at the basin level as a management tool for resources preservation in insular arid and developing regions. |
| first_indexed | 2024-03-10T10:12:51Z |
| format | Article |
| id | doaj.art-9f1aece7e88e4ab895e11b334f18822a |
| institution | Directory Open Access Journal |
| issn | 2076-3263 |
| language | English |
| last_indexed | 2024-03-10T10:12:51Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Geosciences |
| spelling | doaj.art-9f1aece7e88e4ab895e11b334f18822a2023-11-22T01:05:26ZengMDPI AGGeosciences2076-32632021-06-0111626310.3390/geosciences11060263Hydrochemistry and Evolution of Water Quality in a Context of Aridity and Increasing Agriculture in Three River Sub-Basins of Santiago Island (Cape Verde)Nemias Gonçalves0Teresa Valente1Jorge Pamplona2Isabel Margarida Horta Ribeiro Antunes3Campus de Gualtar, ICT, University of Minho, 4710-057 Braga, PortugalCampus de Gualtar, ICT, University of Minho, 4710-057 Braga, PortugalCampus de Gualtar, ICT, University of Minho, 4710-057 Braga, PortugalCampus de Gualtar, ICT, University of Minho, 4710-057 Braga, PortugalIn regions under development and facing recurrent droughts, increasing the area of irrigated agriculture may create additional disruption in water resources management. The present study was focused on three river sub-basins with the highest agricultural intensity (S. Miguel, Ribeira Seca and S. Domingos) in Santiago Island (Cape Verde). Sets of wells were selected to evaluate the influence of salinization and agriculture practices on the hydrochemistry. This assessment was performed by using data from the bibliography (2003) and a recent campaign (2016). The water chemistry indicates lower mineralization in the S. Miguel sub-basin. Nitrates and nitrites, typically associated with diffuse pollution, are present in all sub-basins, but with varying patterns. Additionally, sodium chloride waters occur in all the three sub-basins, especially those closest to the coastline. In turn, a bicarbonate-magnesium facies was identified in S. Domingos, at the furthest point from the coast, indicating a geological control. The comparison between the two periods suggests a decrease in water quality. The rising extension of the irrigation area associated with aridity should intensify the already observed soil salinization. Thus, the present review highlights the strategic importance of water monitoring at the basin level as a management tool for resources preservation in insular arid and developing regions.https://www.mdpi.com/2076-3263/11/6/263river basinagriculture pressurehydrochemistrywater qualitysalinization risk |
| spellingShingle | Nemias Gonçalves Teresa Valente Jorge Pamplona Isabel Margarida Horta Ribeiro Antunes Hydrochemistry and Evolution of Water Quality in a Context of Aridity and Increasing Agriculture in Three River Sub-Basins of Santiago Island (Cape Verde) Geosciences river basin agriculture pressure hydrochemistry water quality salinization risk |
| title | Hydrochemistry and Evolution of Water Quality in a Context of Aridity and Increasing Agriculture in Three River Sub-Basins of Santiago Island (Cape Verde) |
| title_full | Hydrochemistry and Evolution of Water Quality in a Context of Aridity and Increasing Agriculture in Three River Sub-Basins of Santiago Island (Cape Verde) |
| title_fullStr | Hydrochemistry and Evolution of Water Quality in a Context of Aridity and Increasing Agriculture in Three River Sub-Basins of Santiago Island (Cape Verde) |
| title_full_unstemmed | Hydrochemistry and Evolution of Water Quality in a Context of Aridity and Increasing Agriculture in Three River Sub-Basins of Santiago Island (Cape Verde) |
| title_short | Hydrochemistry and Evolution of Water Quality in a Context of Aridity and Increasing Agriculture in Three River Sub-Basins of Santiago Island (Cape Verde) |
| title_sort | hydrochemistry and evolution of water quality in a context of aridity and increasing agriculture in three river sub basins of santiago island cape verde |
| topic | river basin agriculture pressure hydrochemistry water quality salinization risk |
| url | https://www.mdpi.com/2076-3263/11/6/263 |
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