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1 1997. With rivers to the sea: Interaction of land activities, fresh water and enclosed coastal seas: Abstracts, posters. Joint Conference - 7th Stockholm Water Symposium and the 3rd International Conference on the Environmental Management of Enclosed Coastal Seas (EMECS), 10-15 August 1997, Stockholm, Sweden. 119p.

Water resources ; Water management ; Water quality ; Water pollution ; Environmental effects ; Reservoirs ; Monitoring ; Watercourses ; Wastewater ; Irrigation systems ; Wetlands ; Rivers ; Computer techniques ; Education / Finland / Sweden / Germany / Poland / Latvia / Estonia / Lithuania / Nigeria / Brazil / India / South Africa / Japan / Russian Federation / Baltic sea / Black Sea / Chesapeake Bay / Gulf of Thailand / Seto Inland Sea / Neva Bay / Stockholm / Obere Leine River / Kurshiu Marios Lagoon / Gulf of Finland / Leba Basin / Gulf of Riga / Danube River / Caspian Sea / Guanabara Bay / Rio-de Janeiro / Cape Town / Lagos Lagoon / Osaka Bay

(Location: IWMI-HQ Call no: 333.91 G000 WIT Record No: H021084)

2 Akintunde, O. A.; Ozebo, C. V.; Oyedele, K. F. 2022. Groundwater quality around upstream and downstream area of the Lagos Lagoon using GIS and multispectral analysis. Scientific African, 16:e01126. (Online first) [doi: https://doi.org/10.1016/j.sciaf.2022.e01126]

Groundwater flow ; Water quality ; Upstream ; Downstream ; Geographical information systems ; Lagoons ; Coastal aquifers ; Drinking water ; Hydrochemistry ; Parameters / West Africa / Lagos Lagoon / Atlantic Ocean

(Location: IWMI HQ Call no: e-copy only Record No: H051049)

https://www.sciencedirect.com/science/article/pii/S2468227622000357/pdfft?md5=0ed0d5d1ce8c94ea84636352de2e95da&pid=1-s2.0-S2468227622000357-main.pdf
https://vlibrary.iwmi.org/pdf/H051049.pdf

(5.81 MB) (5.81 MB)

Despite covering over 70% of the earth crust, access to potable water is still extremely challenging due to the ubiquity of several water contaminants. In mitigating the effects of these aquifer pollution, a distinctive identification of polluted areas as well as pollution sources is essential. To address the Africa Union's Agenda 2063 goal for environmental sustainability in water security, the Lagos coastal aquifer was evaluated for groundwater pollution induced by seawater intrusion. Hence, the purpose of this study is to determine a zone with suitable groundwater. In so doing, we obtained forty-three groundwater samples for hydrochemical evaluation within selected areas of the Lagos metropolis. However, physico-chemical analyses were conducted on the collected groundwater samples; hydrochemical facies were used to evaluate the dissolved cations and anions. Apart from utilizing the water quality index (WQI) to determine the samples portability, the sodium absorption ratio (SAR) was calculated and used to ascertain the suitability of groundwater for irrigation purposes. Put differently, a spatial variability map was produced using inverse distance weight (IDW) on the ArcGIS module. Furthermore, the piper tri-linear model was adopted to practically identify the four (4) prominent hydrochemical facies which include Calcium Magnesium Chloride 39.5%, Calcium Bicarbonate 23.3%, Calcium Alkali Bicarbonate 23.3% as well as Alkali Bicarbonate. Using the piper tri-linear model, Calcium possesses the dominant facies in all the samples. The result from the water quality index analysis shows that 16.28% of the water sample is excellent water, 32.56% is good water, 39.53 is poor water, and 11.63 is very poor water. The SAR result of the water sample reveals that 32.56% are excellent water, 44.19% good water, 23.26% doubtful and zero percent are unsuitable. This implies the groundwater around the coastal area can be used for irrigation purposes. Finally, from all the spatial variability maps and potentiometric maps, groundwater around the upstream is preferred to downstream due to groundwater flow direction and its remoteness to the Atlantic Ocean and not the shallow lagoon.