A5001730450- Hydrology and Watershed Management Studies
- Flood Risk Assessment and Management
- Soil erosion and sediment transport
- Water resources management and optimization
- Land Use and Ecosystem Services
- Rangeland Management and Livestock Ecology
- Aquatic Ecosystems and Biodiversity
- Groundwater and Watershed Analysis
- Hydrology and Drought Analysis
- Precipitation Measurement and Analysis
- Conservation, Biodiversity, and Resource Management
- Sustainability and Climate Change Governance
- Climate change impacts on agriculture
- Climate variability and models
- Remote Sensing in Agriculture
- Energy and Environment Impacts
- Hydrological Forecasting Using AI
- Hydrology and Sediment Transport Processes
- Geophysics and Gravity Measurements
- Remote-Sensing Image Classification
- Tropical and Extratropical Cyclones Research
- Social Acceptance of Renewable Energy
- Water-Energy-Food Nexus Studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Climate Change, Adaptation, Migration
Technical University of Kenya
2017-2024
University of Nairobi
2022-2023
BOKU University
2021
Technical University of Munich
2019
IGAD Climate Prediction and Applications Center
2013
Kenyatta University
2010-2012
Egerton University
2005-2010
Drought is one of the leading impediments to development in Africa. Much continent dependent on rain-fed agriculture, which makes it particularly susceptible climate variability. Monitoring drought and providing timely seasonal forecasts are essential for integrated risk reduction. Current approaches developing regions have generally been limited, however, part because unreliable monitoring networks. Operational also deficient often reliant statistical regressions, unable provide detailed...
Abstract The impacts of historical land cover changes witnessed between 1973 and 2000 on the hydrologic response Nyando River Basin were investigated. obtained through consistent classifications selected Landsat satellite images. Their effects runoff peak discharges volumes subsequently assessed using models for generation routing available within HEC‐HMS. Physically based parameters estimated from change maps together with a digital elevation model soil datasets basin. Observed storm events...
The Great Rift Valley lakes of Kenya have recently experienced significant increases in their water levels, negatively impacting the local communities. This has provoked renewed concerns about causations, with various geological, anthropogenic and hydro-climatic influences hypothesized as potential causes level rises. study analyses documents fluctuations Lakes Baringo, Bogoria, Nakuru, Solai, Elementaita Naivasha. Hydrometeorological are undertaken to understand lake volume data is used...
Poor agricultural practices among small-scale sub-Saharan African farmers can lead to soil erosion and reduce productivity. However, information on such is normally not well documented, making it challenging design future mitigation strategies. We conducted a fine-scale survey 200 farm households within the transboundary Sio Malaba Malakisi River Basin (SMMRB) between Kenya Uganda quantify frequency type of conservation (SWCPs) implemented. Information sizes, ownership, crops grown,...
Drawing on collective experience from ten collaborative research projects focused the Global South, we identify three major challenges that impede translation of sustainability and resilience into better-informed choices by individuals policy-makers in turn can support transformation to a sustainable future. The comprise: (i) converting knowledge produced during successful application; (ii) scaling up time when are short-term potential impacts long-term; (iii) across space, local sites...
The magnitude and trend of temperature rainfall extremes as indicators climate variability change were investigated in the Arid Semi-Arid Lands (ASALs) Kenya using in-situ measurements gridded proxy datasets, analysed Gaussian-Kernel analysis Mann-Kendall statistics. results show that maximum minimum temperatures have been increasing, with warmer being experienced mostly at night time. average mean seasonal surface air for region 0.74°C 0.60°C, respectively between 1961-1990 1991-2013...
ABSTRACT The effects of conceptual land cover change scenarios on the generation storm runoffs were evaluated in Nyando Basin. spatial represented alternatives that vary between full deforestation and reforestation. Synthetic events depths 40, 60 80 mm formulated according to rainfall patterns assumed have durations corresponding runoff times concentration. Natural Resource Conservation Service–Curve Number model was used generate volumes within sub‐catchments, which subsequently routed...
Solar energy is one of the readily available renewable resources in developing countries within tropical region. Kenya which receive an average approximately 6.5 sunshine hours a single day throughout year. However, there slow adoption solar country due to limited information on spatial variability potential. This study aims at assessing potential photovoltaic Kenya. The factors that influence incident radiation were considered this task included atmospheric transmissivity and topography....
Participatory modelling in water resource management – involving diverse actors what is traditionally a purely analytical process thought to broaden stakeholder engagement and improve outcomes. Further research case studies are required explore the practicalities of integrating meaningful participation within processes sector. may be particular interest context urban informal areas, where confluence climate change, urbanisation contested land requires new methods for planning. This paper...
Study region: Sio Malaba Malakisi river basin, East Africa. Focus: Poor rain-gauge density is a limitation to comprehensive hydrological studies in Sub-Saharan Consequently, Satellite precipitation products (SPPs) provide an alternative source of data for possible use modelling. However, there need test their reliabilities across varied hydro-climatic and physiographic conditions understand applicability. In this study, we evaluated compared the Tropical Rainfall Measuring Mission (TRMM-3B42...
The effects of land use changes on the characteristics floods in Nyando River basin were investigated.Historical state cover derived by processing multi-temporal Landsat images.The detected changes, together with other spatial datasets subsequently used to estimate physically based catchment and hydrologic model parameters for runoff generation transformation, channel flow routing.The results obtained indicated that experienced significant increases peak discharge values, especially upstream...
Sio Malaba Malakisi river basin, East Africa. Poor rain-gauge density is a limitation to comprehensive hydrological studies in Sub-Saharan Consequently, Satellite precipitation products (SPPs) provide an alternative source of data for possible use modeling. However, there need test their reliabilities across varied hydro-climatic and physiographic conditions understand applicability. Using two approaches, we evaluated the performance six SPPs against gauge observations water allocation...
Water availability is a function of climatic and land surface conditions, which determine the amount distribution atmospheric water as it reaches surface. This largely depends on rainfall, whose variability affects water, food livelihood security. paper sought to quantify effects rainfall in an effort support effective resources management. Coefficient Variation (CV), Standardized Anomaly Index (SAI) Mann-Kendall trend test approaches were used assess trends, while correlation regression...
This study evaluated historical land-cover states in order to identify potential land-use transition regimes leading land degradation. Landsat satellite datasets were used characterize for 1986–2017 period. The multinomial probability distribution was establish sample size training and accuracy assessment. Using a hybrid image classification approach, individual images initially clustered using the ISODATA technique, spectral classes later transformed posteriori into respective thematic...
Study RegionThe Great Rift Valley lakes of Kenya have recently experienced significant increases in their water levels, negatively impacting the local communities. This has provoked renewed concerns about causations, with various geological, anthropogenic and hydro-climatic influences hypothesized as potential causes level rises. FocusThis study analyses documents fluctuations Lakes Baringo, Bogoria, Nakuru, Solai, Elementaita Naivasha. Hydrometeorological are undertaken to understand lake...
Regional institutions in Africa have the potential to reinforce adaptive capacity of rural communities handling climate change impacts. The institutional arrangements provide rationale for scaling-up adaptation actions by setting roles individual players involved planning process at local, national and regional levels. then seeks extend disseminate lessons learnt across levels support refinement inclusive implementation long-term strategies. This article discusses these considerations...
Abstract This study employed the Water Evaluation and Planning model to evaluate selected policy‐based water development management options on resources of upper Mara Basin Kenya. The major region were identified quantified establish current demand versus supply status. Data domestic consumption, agricultural industrial consumption collected through a rigorous fieldwork campaign used define state use demand. resource was calibrated validated against observed discharges subsequently simulate...