Spatial assessment of groundwater degradation using physicochemical analysis and GIS: Case study of the basement complex of Ado Ekiti, southwest Nigeria
Abstract
Spatial assessment of groundwater degradation has been carried out in Ado–Ekiti using physicochemical analysis and Geographical Information System (GIS). Groundwater samples from 108 wells were analyzed on a regional basis. Application of GIS enabled the preparation of various thematic maps which were analysed in terms of groundwater quality standards for drinking and domestic utility. The thematic maps of pH, Total Hardness, Total Dissolved Solids (TDS), Chloride, Calcium and Nitrate concentrations produced were re-classified for integration in a GIS environment to produce the groundwater quality map. Anthropogenic influences were observed on the groundwater quality status of the study area as non-potable groundwater was delineated at the built-up areas and regions adjacent to streams and rivers. The integration of the thematic maps proved useful for the delineation of zones of groundwater quality suitable for human consumption and domestic purposes. Spatial analysis of the groundwater quality is essential for a proper understanding of the present environmental challenges and a projection into the future. This will facilitate quick decision-making for holistic groundwater development and management.
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Malomo, S., Okufarasin, V. A., Olorunniwo, M. A., Omode, A., “Groundwater Chemistry of Weathered Zone Aquifers of an area Underlain by Basement Complex Rocks.” J. Afr Earth Sci, vol. 11, nos. 3 & 4, pp. 357-371, 1990.
Taiwo, A. M., Adeogun, A. O., Olatunde, K. A., Adegbite, K. I., “Analysis of Groundwater Quality of Hand-Dug Wells in Peri-Urban Area of Obantoko, Abeokuta, Nigeria for Selected Physico-Chemical Parameters.” Pacific J. Sci & Technol., vol. 12, no. 1, pp. 527-534, 2011.
Tijani, M. N, Oke, S. A., Olowookere, A. T., “Hydrogeochemical characterization of a shallow groundwater system in the weathered basement aquifer of Ilesha area, southwestern Nigeria.” Evolving Water Resources Systems, IAHS Publ., 364, pp. 475-489, 2014.
Tinuola, F. R., Owolabi, J. T., “Issues in Environmental Pollution in Ekiti State.” Res J. Appl Sci., vol. 2, no. 5, pp. 544-547, 2007.
Olajuyigbe, A. E., “Sustainable Water Service Delivery: An Assessment of a Water Agency in a Rapidly Urbanizing City in Nigeria.” J. Sustain Dev., vol. 3, no. 4, pp. 210 – 219, 2010.
Gbadebo, A. M., Oyedepo, J. A., Taiwo, A. M., “Variability of Nitrate in Groundwater in Some Parts of Southwestern Nigeria.” Pacific J. Sci & Technol., vol. 11, no. 2, pp. 572-584, 2010.
Ayodele, O. S., Ajayi, A. S., “Water quality assessment of Otun and Ayetoro Area, Ekiti State, Southwestern Nigeria.” Advanc Sci & Technol Resear., vol. 2, no. 1, pp. 8-18, 2010.
Ishaku, J. M., Ankidawa, B. A., Abbo, A. M., “Groundwater Quality and Hydrogeochemistry of Toungo Area, Adamawa State, North Eastern Nigeria.” Amer J. Mini & Metallur.” vol. 3, no. 3, pp. 63-73, 2015.
Falconer, R., “Water: the most precious resource.” Cardiff Univ Mag, vol. 3, pp. 14 -15, 2003.
Eldaw, E., Huang, T., Mohamed, A.K., Mahama, Y., “Classification of groundwater suitability for irrigation purposes using a comprehensive approach based on the AHP and GIS techniques in North Kurdufan Province, Sudan.” Appl Water Sci. 11, 126, 2021. https://doi.org/10.1007/s13201-021-01443-z
Ehirim, C.N., Nwankwo, C.N., “Evaluation of aquifer characteristics and groundwater quality using geoelectric method in Choba, Port Harcourt.” Arch Appl Sci Resear.” vol. 2, no. 2, pp. 396-403, 2010.
Ige, S. O., Adetunji, A. A., “On Some Socio-Economic Factors Affecting Household Sanitation in Ado-Ekiti, Ekiti State, Nigeria.” J. Environ & Earth Sci.”, vol. 4, no. 9, 21- 29.
Adefemi, O. S., Asaolu, S. S., Olaofe, O., “Assessment of Physico-Chemical Status of Water Samples from Major Dams in Ekiti State, Nigeria.” Park J. Nutr. vol. 6, no. 6, pp. 657-659, 2007.
Dada, T. E., Awokunmi, E. E., Falegan C. R., Olanipekun, E. O., “Status of groundwater quality in selected areas of Ado-Ekiti, Nigeria.” WIT Trans Ecol & Environ., 145, pp. 339-348, 2011.
Awopetu, M. S., Baruwa, A., “Appraisal of Groundwater Quality in Ado-Ekiti Metropolitan Area, Nigeria.” Int J. Advanc Eng Managt & Sci., vol. 3, no. 2, pp. 117-121, 2017.
Yammani, S., “Groundwater quality suitable zones identification: application of GIS, Chittoor area, Andhra Pradesh, India.” Environ Geol.” vol. 53, no. 1, pp. 201-210, 2007.
Nas, B., Berktay, A., “Groundwater quality mapping in urban groundwater using GIS.” Environ Monitor Assessm, 160(1-4), pp. 215–227, 2010.
Balakrishnan, P., Saleem, A., Mallikarjun, N. D., “Groundwater quality mapping using geographic information system (GIS): A case study of Gulbarga City, Karnataka, India.” Afr J. Environ Sci & Technol., vol. 5, no. 12, pp. 1069-1084, 2011.
Talabi, A. O., Oyedele, A. A., Ajayi, C. A., Afolagboye, L. O., Ojo, A. A., Popoola, K., “Comparative Hydrochemical Evaluation of Water at Ilokun Village and Ado-Ekiti Metropolis, Southwestern Nigeria.” Euro J Appl Sci, vol. 9, no. 5, pp. 387-410, 2021.
Oyedele, A. A., “Use of remote sensing and GIS techniques for groundwater exploration in the basement complex terrain of Ado Ekiti, SW Nigeria.” Appl Water Sci., 9:51, 2019. https://doi.org/10.1007/s13201-019-0917-9
Srinivas, Y., Oliver, D. H., Raj, A. S., Chandrasekar, N., “Evaluation of groundwater quality in and around Nagercoil town, Tamilnadu, India: an integrated geochemical and GIS approach.” Appl Water Sci., 3, pp. 631-651, 2013.
Shahab, A., Shihua, Q., Rad, S., Keita, S., Khan, M., Adnan, S., “Groundwater Vulnerability Assessment Using GISBased Drastic Method in the Irrigated and Coastal Region of Sindh Province, Pakistan.” Hydrol Res., 50, pp. 319-338, 2019.
Oroji, B., “Assessing groundwater vulnerability by pollution mapping in Iran: Case study Hamadan – Bahar plain.” Geofísica Int., vol. 57, no. 3, pp. 161-174, 2018.
WHO, “Guidelines for drinking-water quality: fourth edition incorporating the first Addendum.” 2017. http://www.who.int/water_sanitation_health/publications/drinking-waterquality-guidelines-4-including-1st-addendum/en/
SON, “Nigerian Standards for Drinking Water Quality. Standard Organization of Nigeria (SON) Publications. NIS-554, 30 p., 2007.
Karunakaran, K., Thamilarasu, P., Sharmila, R., “Statistical study on physicochemical characteristics of groundwater in and around Namakkal, Tamilnadu, India.” E-Journal of Chemistry, vol. 6, no. 3, pp. 909-914, 2009.
Miglietta, P.P., Toma, P., Fanizzi, F.P., De Donno, A., Coluccia, B., Migoni, D., Bagordo, F., Serio, F., “A Grey Water Footprint Assessment of Groundwater Chemical Pollution: Case Study in Salento (Southern Italy).” Sustainability, 9, 799, 2017.
Prabowo, R., Dewi, N., “Nitrite Content on Well in Meteseh Village, Tembalang Sub-District, Semarang City.” J. Scientif Bio., vol. 5, pp. 1-15, 2016.
Zahra, F.S., Putranto, T.T., “The Assessment of Groundwater Vulnerability towards Contamination using the DRASTIC and NV Indexes in Banjarbaru City, South Borneo, Indonesia.” Indon J. Geog., vol. 53, no. 3, pp. 360-372, 2021. http://dx.doi.org/10.22146/ijg.66716
Adimalla, N., “Spatial Distribution, Exposure, and Potential Health Risk Assessment from Nitrate in Drinking Water from Semi-Arid Region of South India.” Hum. Ecol. Risk Assess Int. J, 26, pp. 1-25, 2019.
Barry, A.A., Yameogo, S., Ayach, M., Jabrane, M., Tiouiouine, A., Nakolendousse, S., Lazar, H., Filki, A., Touzani, M., Mohsine, I., “Mapping Contaminant Plume at a Landfill in a Crystalline Basement Terrain in Ouagadougou, Burkina Faso, Using Self-Potential Geophysical Technique.” Water, 13, 1212. 2021. https://doi.org/ 10.3390/w13091212
Hendrayana, H., Riyanto, I.A., Nuha, A., Lisan, A.R.K., “Unregistered artesian Well Management in Pasuruan, Indonesia: An Attempt to Protect Groundwater Resources.” Indon J. Geog., vol. 53, no. 3, pp. 453-464, 2021. DOI: http://dx.doi.org/:10.22146/ijg.68185
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