Modeling the vulnerability of groundwater to pollution in a fractured shale aquifer in SE Nigeria using information entropy theory, geospatial, and statistical modeling approaches

Aghamelu, O. P.; Omeka, Michael E.; Unigwe, Chinanu O.

doi:10.1007/s40808-022-01640-y

Cited by 7 publications

(9 citation statements)

References 48 publications

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“…The groundwater flow direction is towards south (Figure 1), thus facilitating the possible migration of contaminants towards southern direction within the study area. It can therefore be deduced that due to the high porosity of the geologic units, coupled with the low depth to water table, the aquifer within this area is highly susceptible to contaminant influx from nearby industries and agricultural fields (Aghamelu et al, 2022;Okamkpa et al, 2022).…”

Section: Geology and Hydrogeologymentioning

confidence: 99%

“…Results from Table 3 shows that the groundwater pH is alkaline with values varying between 7.5 and 8.5 (mean = 7.8). The high alkalinity observed in the water can be attributed to dilution and increased buffering from precipitation and rock water interaction (Aghamelu et al, 2022;Omeka et al, 2022b).…”

Section: Irrigation Parameter Equation Referencesmentioning

confidence: 99%

“…Based on the McGowan (2000) classification scheme, 4% and 96% of the total water samples were classified as hard and very hard, respectively. The implication of this is that the high TH values are a result of highly dissolved divalent metallic ions (such as Ca 2+ , Mg 2+ ) from the underlying aquifer material (Unigwe et al, 2022). Sodium (Na) concentration varied from 210.9 mg L -1 -421.6 mg L -1 , averaging 305.1 mg L -1 (Table 3).…”

Section: Irrigation Parameter Equation Referencesmentioning

confidence: 99%

“…Additionally, the groundwater depth-to water table has been found to vary between 2.42 and 25.1 m (during pre-monsoon) and 1.55-25.3 m during post-monsoon (Prasad, 2008). The low depth to water table together with the high permeability and porosity of the underlying geology could serve as sources for contaminant influx into the groundwater nearby industries and agricultural fields (Aghamelu et al, 2022;Okamkpa et al, 2022). An observation of Figure 1 shows that the groundwater flows dominantly towards the south-western direction of the area.…”

Section: Dynamics Of Groundwater Flow and Contaminant Transportmentioning

confidence: 99%

“…The parameters were then combined to evaluate the joint influences from various chemical parameters on crop productivity. Previous studies have focused only on the evaluation of individual irrigation water quality parameters (Unigwe et al, 2022), it is thought that integrating the various irrigation water quality parameters will provide adequate information that will aid in the proper management of soil and irrigation water for enhanced agricultural productivity (Subba Rao, 2018).…”

Section: Irrigation Water Quality Assessmentmentioning

confidence: 99%

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Irrigation suitability and health risk assessment of groundwater resources in the Firozabad industrial area of north-central India: An integrated indexical, statistical, and geospatial approach

Saraswat

Nath

Omeka

et al. 2023

Front. Environ. Sci.

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The recent global upsurge in anthropogenic activities has resulted in a decline in the quality of water. This by extension has resulted in increased ubiquity of water pollution in terms of sources. The application of traditional water quality assessment methods usually involves the use of conventional water quality parameters and guideline values. This may be associated with bias and errors during the computation of various sub-indices. Hence, to overcome this limitation, it is critical to have a visual appraisal of the water quality in terms of source and human health risks exposure for sustainable water resource management and informed decision-making. Therefore, the present study has integrated multiple water quality assessment indices, spatio-temporal, and statistical models to assess the suitability of fifty groundwater samples (n = 50) within the Firozabad industrial area for irrigation and drinking; as well as the likely health risks from oral intake and dermal contact by inhabitants. Electrical conductivity (mean = 1,576.6 μs/cm), total hardness (mean = 230.9 mg/L), dissolved sodium (mean = 305.1 mg/L) chloride (mean = 306.1 mg/L) and fluoride (mean = 1.52 mg/L) occurred in the water at concentrations above the recommended standards; attributed influxes from agricultural and industrial wastewater. The pollution index of groundwater and water quality index revealed that 100% of the groundwater samples are extremely polluted; this was also supported by the joint multivariate statistical analyses. The majority of the irrigational water quality indices (sodium adsorption ratio, Kelly’s Ratio, permeability index, percent sodium) revealed that the long-term use of the groundwater for irrigation in the area will result in reduced crop yield unless remedial measures are put in place. Higher Hazard index (HI > 1) for nitrate and fluoride ingestion was recorded in water for the children population compared to adult; an indication that the children population is more predisposed to health risks from the oral intake of water. Generally, risk levels from ingestion appear to increase in the western and north-eastern parts of the study area. From the findings of this study, it is highly recommended that adequate agricultural practices, land use, and water treatment regulatory strategies be put in place for water quality sustainability for enhanced agricultural production and human health protection.

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Section: Geology and Hydrogeologymentioning

confidence: 99%

Section: Irrigation Parameter Equation Referencesmentioning

confidence: 99%

Section: Irrigation Parameter Equation Referencesmentioning

confidence: 99%

Section: Dynamics Of Groundwater Flow and Contaminant Transportmentioning

confidence: 99%

Section: Irrigation Water Quality Assessmentmentioning

confidence: 99%

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