Browsing by Author "Ongoma, Victor"

Ambient Air Quality Monitoring and Audit over Athi River Township, Kenya

Ongoma, Victor; Shilenje, Zablon W.; Thiong’o, Kennedy; Ondimu, Kennedy I.; Nguru, Paul M.; Nguyo, John K.; Mukola, Joseph; Ogwang, Bob A.; Tirok, Caroline; Apondo, William (International Journals of Scientific Research Publications, 2015)

Monitoring of air pollution is an active area of research. A numbers of agencies; environmental, health and governments consider access to clean unpolluted air as a basic requirement for human, plant, animal and environmental ...

Analysis of reference evapotranspiration (ET0) trends under climate change in Bangladesh using observed and CMIP5 data sets

Rahman, Mohammad A.; Yunsheng, Lou; Sultana, Nahid; Ongoma, Victor (Springer Vienna, 2018-03)

ET0 is an important hydro-meteorological phenomenon, which is influenced by changing climate like other climatic parameters. This study investigates the present and future trends of ET0 in Bangladesh using 39 years’ ...

Application of Z-Index in analysis of recent March-May Drought over Rwanda

Ngarukiyimana, Jean P.; Tan, Guirong; Ongoma, Victor; Ogwang, Bob A.; Vuguziga, Floribert (Meteo Romania (National Meteorological Administration), 2016)

This study analyzed recent extreme weather events in Rwanda with emphasis on drought during March-May (MAM) season using Z-index. Composite analysis identified the years 2009 and 2010 as the most recent dry and wet ...

Characteristics and Changes in SON Rainfall over Uganda (1901-2013)

Ongoma, Victor; Ogwang, Bob A.; Nimusiima, Alex; Tindamanyire, Teddy; Serwanga, Margaret N.; Ayesiga, Godwin; Ojara, Moses; Ssebabi, Fred; Gugwa, Gordon; Nsubuga, Yusuf; Atim, Rhoda; Kibwika, Robert; Balikudembe, Joseph K.; Kikonyogo, Herbert; Kalema, Abubakar; Taire, Aggrey; Kiryhabwe, Anne; Semujju, Musa; Einyu, Felix; Kituusa, Rashid; Aribo, Lawrence (2016)

This study investigated the characteristics and changes in September-November (SON) rainfall over Uganda. The dominant mode of variability of SON rainfall was identified by performing Empirical orthogonal ...

Circulations Associated with Variations in Boreal Spring Rainfall over Kenya

Tan, Guirong; Ongoma, Victor; Mafuru, Kantamla B. (Springer Verlag, 2018)

The decline in March–May (MAM) ‘boreal spring’ rainfall is of great concern to Kenya’s agricultural sector. This study examines factors influencing MAM rainfall variability based on monthly observed and Climatic Research ...

Climate variability and farmers' perception in Southern Ethiopia

Esayas, Befikadu; Simane, Belay; Teferi, Ermias; Ongoma, Victor; Tefera, Nigussie (Hindawi, 2019-06)

'e study aims to analyze climate variability and farmers’ perception in Southern Ethiopia. Gridded annual temperature and precipitation data were obtained from the National Meteorological Agency (NMA) of Ethiopia for the ...

Comparison of least absolute shrinkage and selection operator and maximum likelihood estimators to establish determinants of immunization in Trans-nzoia county

Ongoma, Victor; Otieno, Sheilla A.; Wamalwa, Benson M.; Onyango, Nelson O.; Otieno, Joseph A. (Bucharest Academy of Economic Studies, 2015)

The client factors that influence under - five child guardian compliance to the immunization schedule are interlinked based on household characteristics, socioeconomic status, and maternal health practices. An incentive ...

Contributions of Atlantic Ocean to June - August Rainfall over Uganda and Western Kenya

Ongoma, Victor; Gitau, Wilson; Ogwang, Bob A. (2016)

This study investigates the contributions of Atlantic Ocean to June-August rainfall over Uganda and western Kenya (KU). The study utilized the following datasets: precipitation from the Global Precipitation Climatology ...

Determination of the Best Planting Season for Green Gram in Kitui County - Kenya, Using Analytic Hierarchy Process

Mugo, Jane W.; Musembi, David K.; Kariuki, Patrick C.; Ongoma, Victor (2016-11)

Green gram has recently become an important crop in Kitui County because of its high economic returns and short growing season. The purpose of this study was to analyze the spatial variation of rainfall and temperature, ...

Diagnosis of East African climate and the circulation mechanisms associated with extreme wet and dry events: a study based on RegCM4

Ongoma, Victor; Ogwang, Bob A.; Chen, Haishan; Tan, Guirong; Ntwali, Didier (Springer Berlin Heidelberg, 2015-05-22)

The latest version of the International Centre for Theoretical Physics (ICTP) regional climate model (RegCM4) is used in this study to examine the East African climate, focusing on October to December (OND) rainfall and ...

Diagnosis of seasonal rainfall variability over East Africa: A Case study of 2010-2011 drought over Kenya

Ongoma, Victor; Guirong, T.; Ogwang, B. A.; Ngarukiyimana, J. P. (2015-01)

The primary objective of this study was to investigate the recent climate variability over the East African region; with focus on the 2010-2011 rainfall failure over Kenya. The seasonal rainfall over the region is bimodal, ...

Diagnosis of the 2010 DJF flood over Zambia

Ongoma, Victor; Libanda, Brigadier; Ogwang, Bob A.; Ngonga, Chilekana; Nyasa, Linda (Springer Netherlands, 2016)

This study diagnoses the circulation anomalies associated with the 2010 December–February (DJF) flood in comparison with the 1992 DJF drought over Zambia. Monthly precipitation data for 39 meteorological stations were ...

Dominant atmospheric circulation patterns associatedwith abnormal rainfall events over Rwanda, East Africa

Ngarukiyimana, Jean P.; Fu, Yunfei; Yang, Yuanjian; Ogwang, Bob A.; Ongoma, Victor; Ntwali, Didier (Wiley Online Library, 2017-05)

The study investigated the dominant atmospheric circulation patterns associated with abnormal rainfall overRwanda during the March–May (MAM) rainfall season in 1981–2010. The data sets used in this study include: rainfall,wind, ...

Effects of Urbanization on Climate of Nairobi City

Ongoma, Victor; Nzioka, Muthama J.; Ng'ang'a, John K. (2010)

The Kenya’s capital city-Nairobi is one of the fastest growing cities in the world. There is necessity to investigate the effects of urbanization on the climate of our city. This study looked into the long-term urban ...

Estimation of mean monthly global solar radiation using sunshine hours for Nairobi City, Kenya

Ongoma, Victor; Onyango, Omondi, A. (2015)

This study estimates the total solar radiation potential over Nairobi City. Several theoretical models based on the initial work of Angstrom have been used to estimate the global solar radiations on a horizontal surface ...

Estimation of potential evaporation based on penman equation under varying climate, for Murang’a County, Kenya

Ongoma, Victor; Shilenje, Z. W.; P., Murage (2015)

Estimates of potential evaporation or evapotranspiration (ET) are essential input for rainfall-runoff modeling and water balance calculations. Rain-fed agriculture continues to be the backbone of Kenya’s ...

Evaluation of CMIP5 twentieth century rainfall simulation over the equatorial East Africa

Ongoma, Victor; Chen, Haishan; Gao, Chujie (Springer Vienna, 2018-01)

This study assesses the performance of 22 Coupled Model Intercomparison Project Phase 5 (CMIP5) historical simulations of rainfall over East Africa (EA) against reanalyzed datasets during 1951–2005. The datasets were sourced ...

Evaluation of urbanization influences on urban climate of Kenyan cities

Ongoma, Victor (2014-12-11)

Most cities in Africa's developing countries are evidently becoming more urbanized. This has led to significant modification on climate over the cities which affect human comfort, environment and socio-economic activities. ...

Evaluation of urbanization influences on urban temperature of Nairobi City, Kenya

Ongoma, Victor; Muthama, John N.; Gitau, Wilson (2013)

Developing countries are becoming more urbanized leading to modification on climate over the cities. Proper urban atmospheric planning and management are thus fundamental for cities’ sustainability. Urban weather and climate ...

Evaluation of Urbanization Influences on Urban Winds of Kenyan Cities

Ongoma, Victor; Muthama, N. J.; Gitau, W. (2013)

Most cities in Africa’s developing countries are evidently growing leading to significant modification on climate over the cities that affect human comfort and his environment. Proper urban atmospheric planning and management ...

Browsing by Author "Ongoma, Victor"

Browsing by Author "Ongoma, Victor"

Search Dspace

Browse

All of DSpace

My Account