Assessment of the current status of water quality and nutrients enrichment of rivers Kisat and Auji and Nyalenda wastewater sedimentation ponds using multivariate technique

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Cornel Omondi
Reuben Omondi
Daniel Onyango
Hezron Dickson Onyangore


Monitoring the condition of aquatic ecosystems is important because they provide ecological goods and services on which human beings depend. The present study analyzed the physico-chemical parameters and nutrients enrichment in rivers Kisat and Auji as well as wastewater sedimentation ponds to inform appropriate management measures. The water samples were collected from eight sampling sites starting at the source running downstream and at the wastewater sedimentation ponds beginning from February to October 2021. The physico-chemical parameters were measured in situ, while nutrients were analyzed at the laboratory. The results of the study indicated inconsistencies in the variation of physico-chemical parameters and nutrients enrichment among the sampling sites. The results revealed that dissolved oxygen (DO), electrical conductivity (EC), salinity (sal), total dissolved solids (TDS), turbidity and total nitrogen (TN) showed significance difference between the sites. Similarly principal component analysis revealed variations indicating (temperature, TDS, EC, Sal, TN and Total phosphorus (TP) are the major variables influencing the water quality variations. The overall results demonstrated some sampling sites are heavily contaminated with pollutants attributable to anthropogenic activities. The results of the present study are important for decision making regarding the management of water quality in urban rivers and wastewater sedimentations ponds.


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Omondi, C., Omondi, R., Onyango, D., & Onyangore, H. D. (2023). Assessment of the current status of water quality and nutrients enrichment of rivers Kisat and Auji and Nyalenda wastewater sedimentation ponds using multivariate technique . PAN AFRICA SCIENCE JOURNAL, 3(02).
Fisheries and Aquatic Ecology
Author Biographies

Cornel Omondi, Kenya Water Towers Agency, P.O. Box 41231-80100, Mombasa, Kenya

Kenya Water Towers Agency, P.O. Box 41231-80100, Mombasa, Kenya

Department of Environment, Natural Resources and Aquatic Sciences, Kisii University, P.O. Box 408 – 40200 Kisii, Kenya

Reuben Omondi, Department of Environment, Natural Resources and Aquatic Sciences, Kisii University, P.O. Box 408 – 40200 Kisii, Kenya

Department of Environment, Natural Resources and Aquatic Sciences, Kisii University, P.O. Box 408 – 40200 Kisii, Kenya

Daniel Onyango, Department of Veterinary Anatomy and Physiology, University of Nairobi, P.O. Box 30197 – 00100 Nairobi, Kenya

Department of Veterinary Anatomy and Physiology, University of Nairobi, P.O. Box 30197 – 00100 Nairobi, Kenya

Hezron Dickson Onyangore, Government Chemist Laboratory, P.O. Box 18610 – 00500 Nairobi, Kenya

Government Chemist Laboratory, P.O. Box 18610 – 00500 Nairobi, Kenya


Adeogun, A.O. Impact of industrial effluents on water quality and gill pathology of Clarias gariepinus from Aloro stream, Ibadan, Southwest Nigeria. European Journal of Scientific Research, 2012, 76 (1), 83-94

Agedah, E.C.; Ineyougha, E.R.; Izah, S.C.; Orutugu, L.A. Enumeration of total heterotrophic bacteria and some physico-chemical characteristics of surface water used for drinking sources in Wilberforce Island, Nigeria. Journal of Environmental Treatment Techniques, 2015, 3, 28 – 34

Al- Afify, A.D.G.; Othman, A.A.; Ramadan, M.F. Characterization of chemical microbial quality of Nile River surface water at Cairo (Egypt), Rendiconti Lincei Scienze Fisiche Naturali, 2018, 29 (3), 725-736 DOI:

American Public Health Association Standard Methods for the Examination of Water and Wastewater, 21st Edition. Washington, DC: APHAAWWA. WEF, 2005

Aura, C.M.; Kimani, E.; Musa, S.; Kundu, R.; Njiru, J.M. Spatio – temporal macroinvertebrate multi – index of biotic integrity (MMiBI) for a coastal river basin: a case study of river Tana, Kenya. Ecohydrology & Hydrobiology, 2017, 17, 113 – 124 DOI:

Bagnis, S.; Boxall, A.; Gachanja, A.; Fitzsimons, M.; Murigi, M.; Snape, J.; Tappin, A.; Wilkinson, J.; Comber, S. Characterization of the Nairobi River catchment impact zone and occurrence of pharmaceuticals: implication for an impact zone inclusive environmental risk assessment. Science of the Total Environment, 2020, 703, 134925 DOI:

Bassa, S.; Getabu, A.; Owiti, D.O.; Taabu, A.M.; Ogello, E.; Orina, N.E.; Muhoozi, I.I.; Olwa, R.; Nakiyende, H.; Mbabazi, D.; Muhumuza, E.K.; Balirwa, J.S.; Nkalubo, W. Ecosystem integrity of the Upper Victoria Nile in East Africa based on habitat and fish species biotic indices. Uganda Journal of Agricultural Sciences, 2919, 19(1), 33-49 DOI:

Beniwal, V.D.; Kumari, R.; Jain, S. Physico – chemical parameter: An indicator of water pollution. Journal of Environmental Research, 2021, 5(5), 7857.

Brightbill, R.A.; Munn, M.D. Environmental and biological data for the nutrients enrichment effects on stream ecosystem projects of the Natural Water Quality Assessment Program, 2003-2004. US Geological Survey Data Series, 2008, 345, 13p DOI:

Chen, Y.; Yu, s.; Tang, S.; Li, Y.; Liu, H.; Zhang, X.; Su, G.; Li, B.; Yu, H.; Giesy, J.P. Site – specific water quality criteria for aquatic ecosystems: a case study of pentachlorophenol for Tai Lake, China. Science of the Total Environment, 2016, 541, 65 – 73 DOI:

Chindah, A.C.; Braide, S.A. The physicochemical quality and phytoplankton community of tropical waters: A case of 4 biotopes in the lower Bonny River, Niger Delta, Nigeria. Cademo de Pesquisa Serie Biologia, 2004, 16, 7-35

Cuffney, T.F.; Kennen, J.G.; Waite, I.R. Aquatic ecosystem as indicator and trends in water quality. In comprehensive water quality and purification, 1st ed.; Ahuja, S; ed.; Elsevier, United States of America, 2014; Vol. 1, pp. 122-156 DOI:

El-Agri, A.; Emam, M.A.; Gaber, H.S.; Hassan, E.A.; Hamdy, S.M. Integrated use of biomarkers to assess the impact of heavy metals pollution on Solea aegyptiaca fish in Lake Oorun. Environmental Science Europe, 2022, 34-74 DOI:

Gaber, H.S.; El-Kasheif, M.A.; Ibrahim, S.A.; Authman, M.M.N. Effects of water pollution on El-Rahawy drainage canal on hematology and organs of freshwater fish Clarias gariepinus. World Applied Sciences Journal, 2013, 21(3), 329-341

Gorde, S.P.; Jadhav, M.V. Assessment of water quality parameters: a review. Int. Journal of Engineering Research and Application, 2013, 3(6), 2029 - 2035

Government of Kenya (GoK). Environmental management and coordination (Water Quality) regulation, 2006

Kenya Marine and Fisheries Research Institute (KMFRI). ASFA advisory Board meeting. Rome Italy, report, 2005

Kobingi, N.; Raburu, P.O.; Masese, F.O.; Gichuki, J. Assessment of pollution impacts on the ecological integrity of the Kisian and Kisat rivers in Lake Victoria drainage basin, Kenya. African Journal of Environmental Science and Technology, 2009, 3, 97 – 107

Lubanga, H.L.; Manyala, J.O.; Sitati, A.; Yegon, M.J.; Masese, F.O. Spatial variability in water quality and macroinvertebrate assemblages across a disturbance gradient in the Mara River Basin, Kenya. Ecohydrology & Hydrobiology, 2021, 1642, 3593 DOI:

Maansi, J.R.; Wats, M. Evaluation of surface water quality using water quality indices (WQIs) in Lake Sukhna, Chandigerh, India Applied Water Science, 2022, 12(2) DOI:

Mathuram, T.; Chandran, M.; Dinakaran, K. Study on physicochemical parameters of surface water of Vaigai river near Madurai city, Tamil Nadu, India. International Journal of Creative Research Thoughts, 2017, 5(4), 239

Miruka, J.B.; Getabu, A.; Sitoki, L.; James, O.; Mwamburi, J.; George, O.; Chrispine, N.; Odoli, C. Water quality, phytoplankton composition and microcystin concentration in Kisumu Bay (Kenya) of Lake Victoria after a prolonged water hyacinth infestation period. Lake & Resevoirs: Research & Management, 2021, 26, e12380 DOI:

Munn, M.D.; Frey, J.W.; Tesoriero, A.J.; Black, R.W.; Duff, J.H.; Lee, K.; Maret, T.R.; Mebane, C.A.; Waite, I.R.; Relt, R.B. Understanding the influence of nutrients on stream ecosystems in agricultural landscape. US Geological Circular, 2018, 1437, pp80 DOI:

Ndungu, J.; Augustijn, D.C.; Hulscher, S.J.; Fulanda, B.; Kitaka, N.; Mathooko, J.M. A multivariate analysis of water quality in Lake Naivasha, Kenya. Marine & Freshwater Research, 2014, 66(2), 177 – 186 DOI:

Olbasa, B.W. Characerization of physicochemical water quality parameters of River Gudar (Oromia region, west Shewa Rone, Ethiopia) for drinking purposes. Journal of Applied Chemistry, 2017, 10(5), 47-52 DOI:

Osman, A.G.M.; Al-Awadhi, R.M.; Harabawy, A.S.A.; Mahmoud, U.M. Evaluation of the use of protein electrophoresis of the African catfish (Clarias gariepinus Burchell, 1822) for biomonitoring aquatic pollution. Environmental Research, 2010, 4(3), 235-243 DOI:

Osure, G.O.; Getabu, A.; Aura, C.M.; Omondi, R.; Basweti, E. Longitudinal fish species diversity and distribution in a medium-sized Afro-tropical River in the Lake Victoria Basin. Pan Africa Science Journal, 2022, 2(2) DOI:

Otieno, A.A.; Kitur, E.L.; Gathuru, G. Physico-chemical properties of River Kisat, Lake Victoria catchment, Kisumu County, Kenya. Environmental Pollution and climate change, 2017, 1, 137

Ouma, S.O.; Ngeranwa, J.N.; Juma, K.K.; Mbaru, D.N. Seasonal variation of physicochemical and bacteriological quality of water from five rural catchment area of Lake Victoria basin in Kenya. Journal of Environmental Analytical Chemistry, 2016, 3, 170

Peletz, R.; Kisiangani, J.; Bonham, M.; Ronoh, P.; Delaire, C.; Kumpel, E. Why do water quality monitoring programs succeed or fail? A qualitative comparative analysis of regulated testing systems in Sub – Saharan Africa. International Journal of Hygiene and Environmental Health, 2018, 221, 907 - 920 DOI:

Saalingdong, B.M.; Aram, S.A.; Otu, S.; Lartey, P.O. Examining the dynamics of the relationship between water pH and other water quality parameters in ground and surface water systems. PLoS ONE, 2022, 17 (1), e0262117 DOI:

Tampo, L.; Lazar, I.M.; Kabore, I.; Oueda, A.; Akpataku, K.V.; Djaneye – Boundjou, G.; Bawa, L.M.; Lazar, G.; Guenda, W. A multimetrix index for assessment of aquatic ecosystem health based on macroinvertebrates for the Zio River basin in Togo. Limnologica, 2020, 83, 125783 DOI:

UNEP. A snapshot of the World’s water quality: Towards a global assessment. United Nations Environmental Programme, Nairobi, Kenya, 2016

Vannote, R.; Sweeney, B. Geographic analysis of thermal equilibria: a conceptual model for evaluating the effect of natural and modified thermal regimes on aquatic insect communities. American Naturalist, 1980, 115, 667-695 DOI:

Vicente-Martorell, J.J.; Galindo-Riano, M.D.; Garcia-Vergas, M.; Granado-Castro, M.D. Bioavailability of heavy metals monitoring in water, sediments and fish species from polluted estuary. Journal of Hazardous Materials, 2019, 162 (2-3), 823 – 836 DOI:

Ward, J.V. Thermal charcteristics of running waters. Hydrobiologia, 1985, 125, 31-46 DOI:

World Health Organization. Guidelines for drinking water quality, 4th edition, WHO Press, Geneva Switzerland, 2011

World Health Organization. Water Quality and Health: review of turbidity information for regulators and water suppliers, 2017

Yongo, E.; Agembe, S.W.; Manyala, J.O.; Mutethya, E. Assessment of the current trophic state and water quality of Lake Naivasha, Kenya using multivariate technique. Lakes & Reservoirs: Research & Management, 2022, 27, e12422 DOI:

Zainurin, S.N.; Ismail, W.Z.W.; Mahamud, S.N.I.; Ismail, I.; Jamaludin, J.; Ariffin, K.N.Z.; Kamil, W.M.W.A. Advancement in monitoring water quality based on various sensing methods: A systematic review. International Journal of Environmental Research and Public Health, 2022, 19, 14080 DOI: