George Jeff Onyango

Applied DSAS and multi-temporal Landsat imagery (1994–2024) to quantify 30 years of shoreline change along the Lake Victoria coast in Kisumu County, Kenya. The study divided the ~43 km shoreline into three zones and computed Linear Regression Rate (LRR), End Point Rate (EPR), and Net Shoreline Movement (NSM) across 480 transects. Results reveal dominant erosion near the Kibos River mouth (LRR −23.11 m/yr) and Nyando River mouth (LRR −44.90 m/yr), with significant accretion around Nyangande driven by rainfall-induced flood sedimentation. Findings highlight the urgent need for data-informed shoreline management to protect lake basin communities.

• Conducted a comprehensive literature review on basalt formation and CO₂ sequestration in the Southern and Central Kenyan Rift.
• Collected water and basalt rock samples for geochemical and petrophysical analysis; assessed geological structures via Fracture Spacing Line scan.
• Conducted geophysical investigation using magnetics and Transient Electromagnetics (TDEM) to map basalt depth and permeability for CO₂ storage potential.
• Compiled and presented data providing critical insights for climate adaptation models and future CO₂ storage efforts.

• Assisted with soil and crop data collection, including setup of irrigation fields and determination of saturated hydraulic conductivity using SATURO dual-head infiltrometer.
• Conducted bi-weekly monitoring of crop growth parameters: plant height, stomatal conductance (SC-1 Leaf Porometer), root length, and LAI (Accupar LP-80).
• Studied soil stable carbon within different cropping systems and its impact on soil water retention; analysed field data for report writing.

• Conducted geophysical surveys using Audio Magnetotellurics, ERT, VES, and PQWT-S Natural Electric Field for groundwater mapping in Marsabit and Mandera counties.
• Carried out borehole inventory surveys on functional and non-functional boreholes.
• Mapped study areas using RS and GIS to delineate aquifer recharge zones and assessed aquifer potential for exploratory and monitoring wells.

• Conducted geological field mapping of greenstone belts and gold tailings; collected water and tailing samples for geochemical analyses and environmental impact assessments.
• Performed mineral reserve estimates and defined tailing volumes to assess feasibility of establishing a gold processing plant.
• Conducted comparative analysis of CIP vs CIL project designs and analysed risks associated with geological confidence, grade, and operational parameters.

• Conducted environmental impact assessment ensuring compliance with national legislation; evaluated economic viability and ore quality of Beryllium deposits.
• Performed detailed geological mapping, systematic sampling, and XRF analysis to uphold quality standards.
• Managed environmental permit applications and renewals, liaising with government agencies; conducted stakeholder and community relations.