Evaluation of the Spatial Variation of Rainwater Quality in Parts of Akwa Ibom State of Nigeria Using Chloropleth Map


Akhionbare, S.M.O , Ubuoh E. A , Akhionbare, W.N , Ikhile, C.I ,

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Volume 2 - January 2013 (01)


Studies on the effects of oil exploration activities in Akwa Ibom State of Nigeria have shown that the air quality has been negatively impacted over the years. The quality of rainwater is a function of the prevailing air quality in any area where it falls. Rainwater is an alternative water supply for most of the local population. This study evaluated the spatial variation of rainwater quality in selected locations in parts of Akwa Ibom State within the months of March, July and November using temperature, pH, colour, NO3, Fe, Pb, Cd, and Mn as indices. Control locations in the northern part of the State were also selected. Results showed that rainwater quality in study locations in the south (5.1 – 5.7) was more acidic than in the north (5.4 – 6.9). Generally, values of quality parameters in the study locations were higher than their values in the control locations and followed the pattern March > November > July values. Critical levels of heavy metals were observed (Fe: 0.21 – 0.62 mg/l; Pb: 0.12 – 0.90 mg/l; Cd: 0.01 – 0.05 mg/l; Mn: 0.02 – 0.07 mg/l in study locations) and Fe: 0.1 – 0.90 mg/l; Pb: 0.01 – 0.60 mg/l; Cd: 0.00 – 0.003 mg/l and Mn: 0.01 – 2.10 mg/l in control locations). It was also established that rainwater contaminant levels are a function of the frequency and intensity of the rainfall; the levels in this study expectedly reduced with an increased rainwater intensity. Wind action and lithogenic effects played a role in the dry periods.


variation, precipitation, scavenging, frequency, intensity, Chloropleth maps,lithogenic, wind


  1. Akhionbare, S.M.O. and W.N. Akhionbare (2004), “Effect of Impoundment on the Temperature-Oxygen Regime of Ikpoba River, Nigeria”, International Research Journal in Engineering,Science and Technology (IREJEST), 1(1): p 46 – 58.
  2.  Akhionbare, S.M.O. (2004), “Investigation of the Chemical Hydrology of Aga Spring, Owan Area, Edo State, Nigeria”, International Research Journal in Engineering, Science and Technology (IREJEST), 1(3): p 27 - 36.
  3.  Akhionbare, S.M.O. and W.N. Akhionbare (2005), “The Composition, Seasonal Variation and Distribution of Bacteria in a Small West African Lake”, International Research Journal in Engineering, Science and Technology, IREJEST, 2 (1): p 102-110
  4. .Akhionbare, S.M.O. (2009a), The Environment Concepts, Issues and Control of Pollution, ISBN: 978-978-48201-6-5, MC Computer Press Publishers, Nnewi, Nigeria, 434p.
  5.  Akhionbare, S.M.O. (2009b), “Evaluation of Heavy Metal Concentrations from Different Roof Catchments in a Semi-urban Community”, Global Journal of Engineering and Technology (GJET), Calcutta, Vol 2 (2):223-228.
  6.  Akhionbare, S.M.O. (2011), “Multivariate Statistical Analysis of Heavy Metals in Street Dust of Owerri Metropolis, Nigeria, International Journal of Science and Nature (IJSN), Lucknow, 2(4): 844-849.
  7.  Akwa Ibom State (AKS) (2006), Government of Akwa Ibom State, Natural Endowments, FINANCE NES – Publication of the Ministry of Finance AKS May-June, 2006, VI No. 4 pp.10. Carole B., Pierre C., Raoul C., and Enrique B. (2002), “Occurrence of Pesticides in the Atmosphere in France”. Agronomie, 22 :3540
  8.  Carter, R. James R (2002), Choropleth Maps and Census Data, Geography-Geology Department Illinois State University, Normal, IL, USA. Efe, S.I (2006), “Quality of Rainwater Harvesting for Communities of Delta State, Nigeria”, Journal of the Environment, 26 : 175 -181
  9. .Egereonu, U.U. (2006), ’’Physicochemical Assessment of Rainwater from two Rainguaged Stations in the Rainforest Region, Anambra State, Nigeria’’, J. Chem. Soc. Nigeria, 31(1&2) : 43-48.
  10.  Ferron O. and Gillet H., (1995), «Étude de la Contamination des Eaux Pluviales par les Produits Phytosanitaires", 1er Colloque Interceltique d’Hydrologie et de Gestion des Eaux, Rennes, pp. 55–56.
  11.  Garnaud, S., Mouchel, J.-M., Chebbo, G., and Thévenot, D.R., (1999), “Heavy Metal Concentrations in Dry and Wet Atmospheric Deposits in Paris District: Comparison with Urban Runoff”, Sci. Total Environ, 235–245.
  12.  Golomb, D., Ryan, D., Eby, N., Underhill, J., and Zemba, S., (1997), “Atmospheric Deposition of Toxic onto Massachusetts Bay-I. Metals”, Atmos. Environ, 31: 1349–1359.
  13.  Injuk, J., Van grieken, R., and De leeuw, G., 1(998.), “Deposition of Atmospheric Trace Element into the North Sea: Coastal, Ship, Platform Measurements and Model Predictions”, Atmos. Environ., 32: 3011–3025
  14. Kanellopoulou, E. (2001), “Determination of Heavy Metals in Wet Deposition of Athens”, Global Nest: The int. J., 3(1): pp 45-50
  15. Meybeck, M. and Helmer, R. (2007), Water Quality Monitoring – A practical Guide to the Design and Implementation of Freshwater Quality Studies and Monitoring Programme, Edited by Jamie Batram and Richard Balance, UNEP/WHO
  16. Kumar, J.V., and Takao, H. (2004), “Significance of Rainwater Harvesting in Mega-Diversity Water Resource Country: India”, Journal of Rainwater Catchments Systems, 10(1): 21-28. Migon, C., Journel, B.,and Nicolas, E., (1997), “Measurement of Trace Metal Wet, Dry and Total Atmospheric Fluxes over the Ligurian Sea”,. Atmos. Environ. 31: 889–896.
  17. Nnimmo, B. (2008), “Gas Flaring: Assaulting Communities, Jeopardizing the World”, A paper Presented at the National Environmental Consultation, Environmental Rights Action in conjunction with the Federal Ministry of Environment , Abuja.
  18. Odu, C. T. I. (1994), “Gas Flare Emissions and their Effects on the Acidity of Rainwater in the Ebocha area”, A Paper presented in the Department of Agronomy University of Ibadan, Nigeria, 10p.
  19.  Sanusi A. (1996), « Comportment Physicochimique et Transport des Pesticides Particulaires et Gazeux dans l’atmosphère », Ph.D. thesis, Université Louis Pasteur, Strasbourg. Sanusi, A., Millet, M., Mirabel, P., and Wortham, H., (1999), “Gas-particle Partitioning of Pesticides in Atmospheric Samples.” Atmos. Environ,. 33 : 4941–495
  20. Vukmirovic, Z., Marendic Miljkovic, J., Rajsic, S., Tasic, M., and Novakovic, L.A. (1997), “Resuspension of Trace Metals in Belgrade under Conditions of Drastically Reduced Emission Levels”, Water Air Soil Pollution, 93, 137–156.
  21. Ubuoh, E. A, Akande, S.O. Anyadike, R.N.C., Akhionbare, W. N. Igbojionu, D.O. Njoku, J.D. and Akhionbare, S.M.O. (2010), “Atmospheric Corrosion of Roofs in Selected Parts of Akwa Ibom State, Nigeria”. Global Journal of Science and Technology, 3 (2): pp. 317 –324.
  22. Ubuoh, E.A. and Njoku, J.D. (2009), “Quality of Rainwater in Storage Tanks in Selected Locations in Mbaitoli Local Government of Imo State”,in Uzo M. Igbozurike, Ijeoma , M.A, & Onyenechere, E. C (ed) in Rural Water Supply in Nigeria, pp. 175 – 183

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