Assessment, classification and mapping of groundwater quality for agriculture in selected farm settlements of southwestern Nigeria

Good water quality is very vital to the productivity and sustainability of irrigated agriculture. The suitability for irrigation of groundwater samples collected and analyzed during dry and wet seasons from Ajegunle, Akufo and Eruwa farm settlements of southwestern Nigeria were assessed using severa...

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Bibliographic Details
Published in:Water science & technology. Water supply 2023-09, Vol.23 (9), p.3959-3977
Main Authors: Folarin, Gbolahan Muyiwa, Badmus, Biodun Suraj, Akinyemi, Olukayode Dewunmi, Idowu, Olufemi Abiola, Oke, Adebayo Olubukola, Omodele, Taiwo, Badmus, Ganiyu Olabode
Format: Article
Language:English
Subjects:
agricultural productivity
inverse distance weighted
irrigation water quality indices
magnesium adsorption ratio
sodium adsorption ratio
suitability
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Summary:Good water quality is very vital to the productivity and sustainability of irrigated agriculture. The suitability for irrigation of groundwater samples collected and analyzed during dry and wet seasons from Ajegunle, Akufo and Eruwa farm settlements of southwestern Nigeria were assessed using several irrigation water quality indices (IWQIs). The parameters were analyzed statistically and subjected to correlation. Seasonal spatial distribution maps were generated via GIS. All the water samples from the three farm settlements were found to be mostly soft, fresh, excellent, and suitable for irrigation in both seasons. Meanwhile, soluble sodium percentage (SSP) and Kelley's Ratio (KR) revealed them as unsuitable while other parameters showed different degrees of suitability for different samples from different farm settlements in different seasons. Significant correlations were seen between the selected parameters in both seasons. The distribution maps reveal the spatial distributions of selected parameters within Ajegunle and Akufo farm settlements. Utilizing these findings will enhance systematic groundwater exploitation for irrigation within the settlements. Furthermore, systematic irrigation management practices and crop choices, based on the concentrations and distribution of the parameters viz-a-viz crop requirements should be considered to limit potential dangers that may arise with the use of the water over a long period.
ISSN:1606-9749
1607-0798
DOI:10.2166/ws.2023.226