Department of Environmental and Biosystems Engineering, University of Nairobi, Nairobi, Kenya - Articles

Diesel Engine Emissions and Performance Characteristics under Cape Chestnut Biofuel (Articles)

Jedidah W. Maina, Ayub N. Gitau, James A. Nyang’aya

Journal of Power and Energy Engineering Vol.1 No.6，November 25, 2013

DOI: 10.4236/jpee.2013.16002 4,277 Downloads 7,339 Views Citations
Review of Soil Water Retention Characteristic (SWRC) Models between Saturation and Oven Dryness (Articles)

Vitalis K. Too, Christian T. Omuto, Elijah K. Biamah, John P. Obiero

Open Journal of Modern Hydrology Vol.4 No.4，October 21, 2014

DOI: 10.4236/ojmh.2014.44017 8,452 Downloads 11,005 Views Citations
The Effect of the Operational Parameters on the Draft Requirement of Ripping in a Sandy Clay Soil (Articles)

John Ndisya, Ayub Gitau, Duncan Mbuge, Angela Hiuhu

Open Journal of Optimization Vol.5 No.1，March 3, 2016

DOI: 10.4236/ojop.2016.51001 2,998 Downloads 4,163 Views Citations
Determination of Irrigation Supply Efficiency in Challenging Environment Case Study of Bal’ad District, Middle Shabelle Region in Somalia (Articles)

Abdirashid A. Omar, Christian Omuto, Stephen Ondieki

Computational Water, Energy, and Environmental Engineering Vol.8 No.1，January 9, 2019

DOI: 10.4236/cweee.2019.81001 1,262 Downloads 2,835 Views Citations
Suitability of Soil Water Retention Characteristic Models (SWRC) in Regions and Soil Depth (Articles)

Vitalis K. Too, Christian T. Omuto, Elijah K. Biamah, John P. O. Obiero

Journal of Water Resource and Protection Vol.11 No.6，June 26, 2019

DOI: 10.4236/jwarp.2019.116044 830 Downloads 2,034 Views Citations
Optimization of Specific Draft Requirement and Hitch Length for an Animal Drawn Sub-Soiler: A Case of Sandy Clay Loam Soils (Articles)

Nicodemus K. Mwonga, Ayub N. Gitau, Joackim M. Mutua, Simon T. Mwangi

Open Journal of Optimization Vol.8 No.3，September 9, 2019

DOI: 10.4236/ojop.2019.83008 487 Downloads 1,548 Views Citations
Assessment of Super Absorbent Polymer (SAP) on Plant Available Water (PAW) in Dry Lands (Articles)

Vincent Ng’eno, Christian Omuto, Duncan Mbuge, Vitalis Too

Engineering Vol.15 No.2，February 17, 2023

DOI: 10.4236/eng.2023.152008 224 Downloads 1,023 Views Citations
Micro Hydro Potential Modelling: Integrating GIS into Energy Alternatives for Climate Change Mitigation (Articles)

Gerald C. K. Chelelgo, David N. Siriba, Elijah K. Biamah

Journal of Geoscience and Environment Protection Vol.4 No.8，August 25, 2016

DOI: 10.4236/gep.2016.48005 2,611 Downloads 4,491 Views Citations
Optimization of the Angle of Frog in Mouldboard Tillage Operations in Sandy Clay Soil (Articles)

Angela Hiuhu, Ayub Njoroge Gitau, Duncan Onyango Mbuge, John Ndisya Mulwa

Open Journal of Optimization Vol.4 No.4，December 11, 2015

DOI: 10.4236/ojop.2015.44013 4,169 Downloads 5,581 Views Citations
Optimizing the Performance of a Manually Operated Groundnut (Arachis hypogaea) Decorticator (Articles)

A. N. Gitau, P. Mboya, B. N. K. Njoroge, M. Mburu

Open Journal of Optimization Vol.2 No.1，March 29, 2013

DOI: 10.4236/ojop.2013.21004 9,148 Downloads 18,563 Views Citations
Development of Pedotransfer Functions for Saturated Hydraulic Conductivity (Articles)

John P. O. Obiero, Lawrence O. Gumbe, Christian T. Omuto, Mohammed A. Hassan, Januarius O. Agullo

Open Journal of Modern Hydrology Vol.3 No.3，July 9, 2013

DOI: 10.4236/ojmh.2013.33019 4,905 Downloads 8,209 Views Citations
Evaluating Physico-Mechanical Behaviour of Pyrethrum Using Principal Component Analysis and Response Surface Modeling for Optimal Design and Performance of Precision Harvesters (Articles)

Andrew Mwamba, Frankline Mwiti, Solomon Mulindi

Open Journal of Optimization Vol.14 No.4，December 1, 2025

DOI: 10.4236/ojop.2025.144009 17 Downloads 84 Views Citations
Assessment and Prediction of Effects of Geo-Environmental Hazards on Road Infrastructure Using an Ensemble Modeling Approach: A Case Study of Limuru - Mai Mahiu - Narok Road and Its Environs, Kenya (Articles)

Evangeline Muthoni Njeru, Daniel O. Olago, John P. O. Obiero, Lydia Olaka

Advances in Remote Sensing Vol.14 No.3，August 6, 2025

DOI: 10.4236/ars.2025.143007 50 Downloads 312 Views Citations
Application of Geographic Information Systems in Groundwater Prospecting: A Case Study of Garissa County, Kenya (Articles)

Christopher N. Muhwanga, John P. O. Obiero, Faith N. Karanja

Journal of Geographic Information System Vol.10 No.4，August 23, 2018

DOI: 10.4236/jgis.2018.104023 1,270 Downloads 4,094 Views Citations
The Implication of Unreliable Urban Water Supply Service: The Case of Vendor Water Cost in Langata Sub County, Nairobi City, Kenya (Articles)

E. A. Ochungo, G. O. Ouma, J. P. O. Obiero, N. A. Odero

Journal of Water Resource and Protection Vol.11 No.7，July 31, 2019

DOI: 10.4236/jwarp.2019.117055 1,720 Downloads 4,160 Views Citations
Comparing Pre-Paid Communal Water Metering and Delegated Management in Urban Poor Setting: Case Studies in Nakuru and Kisumu in Kenya (Articles)

Robert Hanjahanja, Christian Omuto, Elijah Biamah

Current Urban Studies Vol.6 No.4，November 19, 2018

DOI: 10.4236/cus.2018.64026 785 Downloads 2,208 Views Citations
Influence of Land Cover Changes and Climatic Variability on Discharge Regime of Njoro River Catchment in Kenya (Articles)

Kennedy Kitonga Mwetu

Open Access Library Journal Vol.6 No.7，July 10, 2019

DOI: 10.4236/oalib.1105461 452 Downloads 1,385 Views Citations
Drought Impacts on Community Livelihoods in the Upper Ewaso Ng’iro Basin, Kenya (Articles)

Bancy Mati, Amos Karithi, June Kimaiyo

Journal of Geoscience and Environment Protection Vol.11 No.12，December 19, 2023

DOI: 10.4236/gep.2023.1112005 199 Downloads 967 Views Citations
Implications of Dynamic Interactions between Meteorological Patterns and Surface Water Quality on Environmental Health—A Case Study of the Nairobi River (Articles)

Haron Safari, Hongbin Chen, Edwin Kipkirui, Duncan Mbuge

Journal of Geoscience and Environment Protection Vol.12 No.5，May 24, 2024

DOI: 10.4236/gep.2024.125008 189 Downloads 828 Views Citations
Mesophilic Process and Kinetics Studies of Selected Biomolecules as Potential Enhancers of Biomethanization of Cow Dung in an Anaerobic Tubular Batch Reactor (Articles)

Paul Njogu, Francis Xavier Ochieng, Benard Ogembo, Stephen Ondimu, Christopher Kanali, Erick Ronoh, Daniel Omondi, Hiram Ndiritu

Energy and Power Engineering Vol.14 No.3，March 30, 2022

DOI: 10.4236/epe.2022.143007 256 Downloads 961 Views Citations

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