References
Adimalla, N., & Qian, H. (2019). Groundwater quality evaluation using Water Quality Index for drinking purposes and human health risk assessment in an agricultural region of Nanganur, South India. Ecotoxicology and Environmental Safety, 176, 153–161. doi:10.1016/j.ecoenv.2019.03.066. Bordalo, A. A., Teixeira, R., & Wiebe, W. J. (2006). A Water Quality Index applied to an international shared river basin: The case of the Douro River. Environmental Management, 38(6), 910–920. doi:10.1007/s00267-004-0037-6. Bro, R., & Smilde, A. K. (2014). Principal component analysis. Analytical Methods, 6(9), 2812– 2831. doi:10.1039/C3AY41907J. Cattell, R. B. (1966). The scree test for the number of factors. Multivariate Behavioral Research, 1(2), 245–276. doi:10.1207/S15327906MBR0102_10. Easton, Z. M., Gérard-Marchant, P., Walter, M. T., Petrovic, A. M., & Steenhuis, T. S. (2007). Identifying dissolved phosphorus source areas and predicting transport from an urban watershed using distributed hydrologic modelling. Water Resources Research, 43(11), W11414. doi:10.1029/2006WR005697. Hotelling, H. (1933). Analysis of a complex of statistical variables into principal components. Journal of Educational Psychology, 24(6), 417–441. doi:10.1037/h0071325. House, M. A. (1990). Water quality indices as indicators of ecosystem change. Environmental Monitoring and Assessment, 15(3), 255–263. Huong, N. T. L., Ohtsubo, M., Li, L., Higashi, T., & Kanayama, M. (2008). Assessment of the water quality of two rivers in Hanoi City and its suitability for irrigation water. Paddy and Water Environment, 6(3), 257–262. doi:10.1007/s10333-008-0125-y. Jenkins, S. H. (1982). Standard methods for the examination of water and wastewater. Water Research, 16(10), 1495–1496. doi:10.1016/0043-1354(82)90249-4. Jolliffe, I. T., & Cadima, J. (2016). Principal component analysis: A review and recent developments. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 374(2065), Article 20150202. doi:10.1098/rsta.2015.0202. McPhail, C. D., & Stidson, R. T. (2009). Bathing water signage and predictive water quality models in Scotland. Aquatic Ecosystem Health & Management, 12(2), 183–186. doi:10.1080/14634980902907540. Murtagh, F., & Legendre, P. (2014). Ward’s hierarchical agglomerative clustering method: Which algorithms implement Ward’s criterion? Journal of Classification, 31(3), 274–295. doi:10.1007/s00357-014-9161-z. Niemi, G. J., DeVore, P., Detenbeck, N., Taylor, D., Lima, A., Pastor, J., Yount, J. D., & Naiman, R. J. (1990). Overview of case studies on recovery of aquatic systems from disturbance. Environmental Management, 14(5), 571–587. doi:10.1007/BF02394710. Oketola, A. A., Adekolurejo, S. M., & Osibanjo, O. (2013). Water quality assessment of River Ogun using multivariate statistical techniques. Journal of Environmental Protection, 4(5), 466–479. doi:10.4236/jep.2013.45055. Olsen, R. L., Chappell, R. W., & Loftis, J. C. (2012). Water quality sample collection, data treatment and results presentation for principal components analysis: Literature review and Illinois River watershed case study. Water Research, 46(9), 3110–3122. doi: 10.1016/j.watres.2012.03.028. Orobator, P. O., Akiri-Obaroakpo, T. M., & Orowa, R. (2020). Water quality evaluation from selected aquaculture ponds in Benin City, Nigeria. Journal of Research in Forestry, Wildlife and Environment, 12, 24–33. Ramakrishnaiah, C. R., Sadashivaiah, C., & Ranganna, G. (2009). Assessment of Water Quality Index for the groundwater in Tumkur Taluk, Karnataka State, India. E-Journal of Chemistry, 6(2), 523–530. doi:10.1155/2009/757424. Setianto, A., & Triandini, T. (2013). Comparison of kriging and inverse distance weighted interpolation methods in lineament extraction and analysis. Journal of Applied Geology, 5(1), 21–29. doi:10.22146/jag.7204. Shrestha, S., & Kazama, F. (2007). Assessment of surface-water quality using multivariate statistical techniques: A case study of the Fuji River Basin, Japan. Environmental Modelling & Software, 22(4), 464–475. doi: 10.1016/j.envsoft.2006.02.001. Standards Organisation of Nigeria. (2015). Nigerian standard for drinking water quality: NIS 554:2015. Standards Organisation of Nigeria. Talabi, A. T., Odunaike, K. O., Akinyemi, L. P., & Bashiru, B. O. (2020). Investigation for heavy metals in river waters in the Federal Capital Territory, North Central Nigeria. International Journal of Energy and Water Resources, 4, 213–219. Varol, M., Gökot, B., Bekleyen, A., & Şen, B. (2012). Spatial and temporal variations in surface- water quality of the dam reservoirs in the Tigris River Basin, Turkey. Catena, 92, 11–21. doi: 10.1016/j.catena.2011.11.013. Vasanthavigar, M., Srinivasamoorthy, K., Vijayaragavan, K., Rajiv Ganthi, R., Chidambaram, S., Anandhan, P., Manivannan, R., & Vasudevan, S. (2010). Application of Water Quality Index for groundwater-quality assessment: Thirumanimuttar Sub-Basin, Tamil Nadu, India. Environmental Monitoring and Assessment, 171, 595–609.
