Please ensure Javascript is enabled for purposes of website accessibility PROFILE - DR RAPHAEL MULI WAMBUA


Staff Information
COD, Senior Lecturer
Corporate Email
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Phone Number
Division / Faculty
Faculty of Engineering and Technology
Directorate / Dept
Agricultural Engineering
P.O Box 536-20115 Egerton

2013-2016: Doctor of Philosophy Degree in Agricultural Engineering, Egerton University, Kenya.

2005-2008: Master of Science Degree in Agricultural Engineering

1998-2004: Bachelor of Science Degree in Agricultural Engineering,  (2ndClass, Upper Division)

1992-1995: Kenya Certificate of Secondary Education (K.C.S.E), Tala High School, passed

1983,1990-1991: Kenya Certificate of Primary Education (K.C.P.E) Kamuya Primary

1984-1989: Primary education - Kalia Primary School (standards 1 to 6)

  • April 2018-Date: Senior Lecturer - Teaching, development of lecture manuals, development academic programs, drafting Research Proposals, research implementation,  and Concept notes
  • 2013-April 2018: Lecturer - Egerton University. Teaching, development of lecture manuals, development academic programs, drafting Research Proposals, research implementation,  and Concept notes
  • 2009-2013: Assistant Lecturer  - South Eastern Kenya University. Teaching, development of lecture manuals, development academic programmes, drafting Research Proposals and Concept notes
  • 2008-2009: Lecturer (Part time) - Egerton University, Faculty of Engineering & Technology. Teaching, development of lecture and practical manuals. Organizing and participating in conferences and seminars,
  • 2005-2008: Tutorial Fellow and Demonstrator - Egerton University, Faculty of Engineering &Technology
  • Teaching, instructing, preparing manuals, conducting Engineering Practice, organizing and co-coordinating seminars
  • 1999-2002: Teacher Carmel Girl’s Secondary School.Part-time Teaching, guiding and counseling students
  • 1995-1997: Teacher, Kamuya Primary School. Part-time Teaching, guiding and counseling students
  • 1996-1998: Teacher St. Josephs Boarding primary, Mbiuni. Part-time Teaching, guiding and counseling at the school


  • 2018-Date: Chairman of the department of agricultural engineering department - Coordinating general activities involving students and staff
  • 2018-Date: Member of the university senate - Attending senate meetings and representing the department
  • 2018-Date: Member of faculty management board - Attending meetings and participating in faculty of engineering management activities
  • 2018-Date: Appointed to university international conference committee - Participating in organizing conference in the university and representing the faculty of engineering and technology in the committee
  • 2018-Date: Chief examiner and head of the department - Coordination of academic activities within the agricultural engineering department
  • Chairman of the board of examiners
  • 2018-Date: Chairman of the board of examiners - Chairing the proposal defense for postgraduate students
  • 2018-Date: Member of faculty board examiners for thesis and proposals - Participating in faculty board of examiners for proposal/thesis defense
  • 2018-Date: Member of board of examiners for postgraduate student thesis - Representing the senate (that is being a Senate representative) in postgraduate thesis defense for selected theses
  1. Kenya Climate Smart Agriculture Project (KCSAP) on Validation of mechanized soil and water conservation approaches for sorghum production in the ASALs of Kenya (budget KES 9,313,857), Co-PI of the project
  2. Strengthening Capacities for Agricultural Education, Research and Adoption in Kenya  (SCARA) SCARA-Appear Project-Funded by Austria Government, team member of the project, completed in 2019
  • Hydrological and drought modeling and or simulation
  • Forecasting water resources systems/hydrological events using artificial neural networks
  • Water Resources and Environmental Engineering
  • Natural Resources Management using GIS and Remote Sensing
  • Climate Change and its Impact on Water Resources
  • Science, Innovation and technology development in Water Resources Engineering/ Agricultural Engineering
  • Sustainable Soil and Water Conservation Engineering
  1. Kinyanjui,S. M., Onyando, J. O. and Wambua, R. M. (2021). Quantitative Analysis of Geomorphologic Characteristics of Amala River Catchment in Kenya, Journal of Engineering Research and Reports, 20(2), 91-106,
  2. Nyokabi, E. W., Wambua, R. M. and Okwany, R. O. (2020). Assessment of rainfall, streamflow and reservoir level trends for malewa river catchment, Naivasha, Kenya, Journal of Civil, Construction and Environmental Engineering (JCCEE), 6(1); 1-8.
  3. Sang H., Wambua, R. M. and Raude J. M. (2020). Yield response, water use and water productivity of tomato under deficit sub-surface drip irrigation and mulching, Journal of sustainable research in Engineering, 6(2): 47-55
  4. Lateiro S. S, Wambua, R.M, Raude, J. M. 3 and Mutua, B. M. (2020). Water Flow and Sediment Flux Forecast in the Chókwè Irrigation Scheme, Mozambique, Journal of Water Resource and Protection (JWARP, 12(12):1089-1122.
  5. Amisi E. O., Kundu P. M. and Wambua R. M. (2020). Modeling climate variability influence on river regime in upper Njoro catchment, Kenya, Journal of Civil Construction and Environmental Engineering, 5(5): 126-137.
  6. Wambua, R. M. (2020) Development of a Non-linear Integrated Drought Index (NDI) for managing drought and water resources forecasting in the Upper Tana River basin-Kenya, International journal of environmental sustainability and green technologies (IJESCT), 11(1): 15-33.
  7. Sang, H. J., Wambua, R. M. and Raude, J. M. (2020). Modelling tomato water productivity using Acquacrop model in Njroro Sub-county, Nakuru, Kenya, Journal of Engineering research and Reports, 10(3): 1-13.
  8. Wambua, R. M. (2019). Hydrological drought forecasting using modified Surface Water Supply Index (SWSI) and Stream Flow Drought Index (SDI) in conjunction with Artificial Neural Networks (ANNs), International journal of service science, management, Engineering and Technology (IJSSMET), 10(4): 39-57.
  9. Kilongosi C, Raude J. M., Wambua, R. M., Malesu, M. and Oduor, A. (2019). Assessment of the best moisture conservation in Sorghum production under spate irrigation; a case study of Ewaso Nyiro South Drainage Basin, Journal of sustainable research in engineering, (5(1): 12-24.
  10. Wambua, R. M. (2019). Drought estimation-and-projection using standardized supply-demand-water index and artificial neural networks for upper Tana river basin in Kenya, International journal of applied geospatial research (IJAGR), 10(4): 11-27.
  11. Lateiro de S., Wambua, R. M., Raude, J. M. and Mutua, B. M. (2019). Assessment of water flow and sedimentation processes in irrigation schemes for decision-support tool development: a case review for Chókwè Irrigation Scheme, Mozambique, AgriEngineering Journal 2019, 1(8), 100–118.
  12. Wambua, R. M. Mutua, B. M. and Raude, J. M. (2018) Detection of Spatial, Temporal and Trend of Meteorological Drought Using Standardized Precipitation Index (SPI) and Effective Drought Index (EDI) in the Upper Tana River Basin, Kenya, Open Journal of Modern Hydrology 08(03):83-100, DOI: 10.4236/ojmh.2018.83007
  13. Wambua, R. M. Mutua, B. M. and Raude, J. M. (2018) Analysis of Drought and Wet-Events Using SWSI-Based Severity-Duration-Frequency (SDF) Curves for the Upper Tana River Basin, Kenya, Hydrology journal,6(2): 43-52,doi: 10.11648/j.hyd.20180602.11
  14. Namu,P. N., Raude, J. M. , Mutua, B. M. and Wambua, R. M.  (2018)  Determination of Discrete Particles Optimum Design Parameters for Surface Irrigation System Settling Basin, Journal of Sustainable Research in Engineering, 4 (2): 33-44.  
  15. Amisi, L., Kundu, P. M., Wambua, R. M. (2018). Heterogeneity in Event-Based Soil Hydrologic Response to Different Land Use Types in Upper River Njoro Catchment, Kenya, Int. Journal of Engineering Management, 2(3): 47-57.
  16. Wambua, R. M. Mutua, B. M. and Raude, J. M. (2017). Analysis of spatial and temporal drought variability in a tropical river basin using Palmer Drought Severity Index (PDSI), International Journal of Water Resources and Environmental Engineering, 9(8): 178-190.
  17. Wambua, R. M. Mutua, B. M. and Raude, J. M. (2017). Characterization of Temporal and Spatial Drought Risk Events Using Surface Water Supply Index (SWSI) in a Tropical River Basin, Civil Engineering, 2(2): 1-10.
  18. Namu, P. N., Raude, J. M.,  Mutua, B. M. and Wambua, R. M. (2017). Prediction of Water Turbidity using Artificial Neural Networks: A Case Study of Kiriku-Kiende Settling Basin in Embu County, Kenya, American Journal of Water Resources 5(3): 54-62.
  19. Wambua, R. M., Mutua, B. M. and Raude, J. M. (2016) Prediction of Missing Hydro-Meteorological Data Series using Artificial Neural Networks (ANN) for Upper Tana River basin, Kenya,  American Journal of Water Resources, 4(2): 35-43,
  20. Wambua, R. M., Akuja, T. E. (2016). Assessment of Water and Soil Management Approaches for Small-Scale Dry Land Farming in Kitui and Makueni Counties, Kenya, International Journal of Agricultural Research and Review,. 4(3): 494-503.
  21. Kauti, M. K., Kanui, T. I., Wambua R. M. and Mwobobia Royford Murangiri, M. R. (2016). Evaluation of Household Soil Conservation Technologies in Arid and Semi-Arid Lands (ASALs) (The Case of Kitui Central, Mulala and Wote Divisions in Kenya,  International Journal of Plant & Soil Science 11(5): 1-7, 2016
  22. Wambua, R. M., Mutua, B. M. and Raude, J. M. (2015).  Spatio-temporal Drought Characterization for the Upper Tana River Basin, Kenya Using Standardized Precipitation Index (SPI), World Journal of Environmental Engineering, 3(4):111-120,
  23. Wambua, R. M., Mutua, B. M. and Raude, J. M. (2015). Hydrological drought frequency estimation using stream flow drought index and modified Gumbel method in upper Tana River basin Int. Journal of current research and review, 7(22): 42-51.
  24. Wycliffe I. Lishenga, Nyaanga D. M. Wambua R. M (2015). Efficacy of hydroponic and soil-based vetiver systems in the treatment of domestic wastewater, Int. Journal of Pure and Applied Sciences and technology, 26(2): 53-63.
  25. Wambua R. M. and Mutua, B. M. (2014). Evaluation of drip irrigation and greenhouse systems in production of tomatoes in arid and semi-arid lands, Kenya European International Journal of Science and Technology, 3(5):  1-12,Corpus ID: 73646135
  26. Wambua, R. M., Mutua, B. M. and Raude, J. M. (2014). Drought Forecasting Using Indices and Artificial Neural Networks for Upper Tana River Basin, Kenya-A Review Concept, Journal of Civil & Environmental Engineering, 4(4): 1-12,DOI: 10.4172/2165-784X.1000152
  27. Wambua, R. M., Mutua, B. M. (2014). Drought Indices Assessment For Sustainable Water Resources Management-A Case Review For Upper Tana River Basin, Kenya, International Journal of Engineering Research and Technology (IJERT), 3(10): 429-438.
  28. Wambua R.M, Mutua, B M, Nyaanga, D. M. and Kundu P (2009). Classification of Catchment Risk Areas Using Spatially Distributed Event-Based Soil Erosion: A case of upper Njoro River Catchment, Kenya (International Journal of Design Nature & Ecodynamics, 3(4); 1-15 (website
  29. Wambua, R. M and Mutua, B. M., and Nyaanga, D. M. (2008). Estimation of spatially distributed event-based runoff and sediment yield within Njoro catchment (International Journal of Pure and Applied Science, 1 (1 ): 39-49.
  30. Kundu, P. M., China, S. and Wambua, R. M. (2009). Quantifying land cover and land use change by remote sensing& GIS techniques in R. Njoro catchment, Kenya, International Journal of Disaster mgnt and risk reduction, 2(1): 1-10.
  31. P.K. Cheruiyot, G.M. Ngunjiri, C. K. W. Ndiema, M. C. Chemelil, R. M. Wambua (2009). Effect of ground insulation and green-house mico-Environment on the rate and quality of biogas production , Botswana Journal of technology, 18 (2):  (website view/52254)
  32. Wambua, R. M., Mutua, B. M. Kimani, P. K and Nyaanga, D. (2008). Determination of spatially distributed event-based runoff and sediment yield within Njoro river catchment, Kenya. Egerton Journal of Science and Technology
  33. Nyaanga, D. M., Maina, G. G. and Wambua, R. M. (2007). Hammer Mill Throughputs and Power Requirements While Grinding Maize and Wheat, Egerton Journal of Science and Technology series Volume, VII (1); 111-119.
  34. Nyaanga, D. M., Chemelil, M. C. and Wambua, R. M.(2007). Development and Testing of a Portable Hand-operated  Groundnut Sheller-Egerton journal,7:  Special Issue, 2007 (Published)
  1. Higher education partnership for sub-saharan Africa (HEPSSA). Theme; university-industry collaboration and delivery of engineering academic programmes in the wake of covid-19 pandemic, organized by Moi University, 4th -5th February, 2021, Merica Hotel, Nakuru Kenya (Virtually attended)
  2. Omondi, B., Mutua,  B. M., and Wambua, R. M. (2019). Evaluation of stream flow response to agricultural water abstraction and its viability with rainfall for Thiba river watershed, Kenya, Kibabii University conference 2019.
  3. Wambua, R. M. (2016).  Integrated water resources management, ‘theme: enhancing livelihoods through Dryland Agriculture in Kenya’s Arid and Semi-arid lands, Chemeron Dryland Research Training and Ecotourism Centre, Baringo 3rd-5th May 2016.
  4. Wambua, R. M., Mutua, B. M. and Raude J. M. (2015) Drought forecasting under climate change scenarios using ANNs for sustainable water resources management in Upper Tana River basin , Kenya,  Paper presented at international conference held in in Dresden NEXUS conference United Nations University DNC2015 on   25th to 27th march 2015.
  5. Wambua, R. M., Mutua, B. M.  (2014).  On-farm performance of drip irrigation and greenhouse systems in production of tomatoes in arid and semi-arid lands (ASALs),, The 8th Egerton University international conference proceedings, 26th-28th March, Egerton University, Kenya
  6. Ndungu, P.  M., Ngunjiri,G. M. N.,  Nyaanga,  Wambua, R. M. (2014). Characterization and Rate of Biogas Production of Selected Mixtures of Livestock Droppings, 6th International Conference on Appropriate Technology Kenyatta University Conference Center November 25th to 29th 2014, Nairobi, Kenya
  7. Wambua, R. M and Mutua, B. M. (2009). Assessment of Land Resources Degradation Proceedings of the international conference, Egerton University, ARC, Sep 15th-17th 2009

Undergraduate Teaching

  • Teaching undergraduate Bachelor of Science students in Agricultural Engineering, Water and Environmental Engineering. This include students in their third, fourth and fifth academic years of study. The teaching involve both theory and practical in various courses mainly Engineering Survey, irrigation and drainage engineering, research methods, Agricultural and Domestic Waste Management, hydrology
  • Teaching of other undergraduate students undertaking Bachelor of Science in Agricultural Education and Extension, Horticulture, Agriculture, Animal Science, Veterinary Medicine. The main courses are Soil and Water Management Farm Structures, Water Resources Development, Agro-climatology

Selected Undergraduate Projects Supervised

  • Design, fabrication and performance testing of a motorized Potato chipper 2015
  • Design of a rotating drum briquetting machine 2016
  • Design of gravity filtration system for Dewatering human sludge 2016


Postgraduate TeachingT

  • eaching postgraduate students training for Master of Science in Agricultural Engineering, Water Resources and Environmental Management, Soil and Water Engineering. The teaching include theory and application of courses such as Research Methods, Hydraulic Structures, Irrigation and Drainage Engineering.
  1. Francis Musyoka. MSc. Title ‘Assessing the Impact of Climate Change on Hydropower Generation in Kenya’: (MSc Water Resources)-Completed 2016
  2. Brian Omondi, Msc. Title ‘Modelling the Impacts of Expansion of Mwea Irrigation Scheme on the Flow Regime of Thiba River, Kenya Using HEC-GEOHMS/HEC-HMS’Completed-2017
  3. Johnstone Mainye, Msc TitleModelling the Effect of Rainfall Magnitude on Runoff, Soil Erosion and Sediment Yield in Sosiani Catchment In Kenya Using ArCSWAT’ ‘Completed 2017


Theses Being Supervised

  1. Kilongosi C. M. MSc. Title ‘Estimation of Crop Water Requirement and spate irrigation demand using remote sensing and geographic information system in Kwenia sub-catchment, Kajiado County’ completed 2019
  2. Tobias Omulo Odhiambo MSc. Title ‘Characterization of spatial and temporal agricultural drought using satellite-based indices in Lake Baringo basin, Kenya-on-going
  3. Leah Amisi, MSc Title, Response Of Event-Based Soil Hydrological Functioning To Land Use In Upper River Njoro Catchment, Graduated 2019
  4. John Twesige,  MSc Title, Hydrological Response to Land use and Land Cover Change (LULC) in Katonga River Basin, Uganda,( MSc Water Resources- PAUWES) completed 2019
  5. Kinyanjui S. M. MSc Thesis title, Modelling Surface Water Flow for Ungauged Sites Within the Upper Mara River Catchment Using Geomorphologic Characteristics, on-going
  6. Nyokabi E. W. MSc Thesis title, Evaluation and Forecasting of Hydrological Drought Using SDI and SWSI In Malewa River Catchment, on-going
  7. Amisi E. MSc Thesis title, Evaluation and Forecasting of Climate Variability Impact On Spatio-Temporal Distribution of Stream Flow in River Njoro Catchment, Kenya, on-going
  1. Lateiro Salvador de Sousa, PhD, Thesis Title hydraulic and operational performances of Chókwè irrigation scheme in Mozambique, in view of sedimentation - PhD on-going



  1. Kenya society of agricultural and biological engineers (KESEBAE) - Member (MIAgrE)
  2. Registered as an international Member of Institution of Agricultural Engineers (MIAgrE) as a member in 2016 (Membership No. 42668) - Grad. Engineer
  3. Engineers Board of Kenya (EBK) 2011 registered as a Grad. Engineer with EBK (Membership No. B 6731) - Member
  4. The World Association of Soil and Water Conservation (WASWC), registered as a member in 2007 - Member
  5. Registered with the Kenya Society of Agricultural Engineers (KSAEw), 2007 - Member
  6. Registered as a Member of Eastern Africa Water Association (EAWA), 2008 - Member
  7. Registered with Greater Horn of Africa Rainwater Partnership (GHARP) Kenya Rainwater Association (KRA): Promoting Rainwater-Harvesting and Utilization, 2011
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