Estimating Groundwater Storage in Weathered Crystalline Rock Aquifers of Aroca Catchment, Northern Uganda using Geophysical Methods and Aquifer Tests

Inhaltsverzeichnis (Table of Contents)

• INTRODUCTION
• Background
• PROBLEM STATEMENT
• OBJECTIVES
• Main Objectives
• Specific Objectives
• Justification and Significance of the study
• Scope of work
• Study Area
• Location and Demography
• Climate
• Drainage and hydrology
• Geology of the Aroca catchment
• Hydrogeology
• LITERATURE REVIEW
• Geology and geological setting
• Regional Geology
• Evolution of weathered crystalline rock aquifers
• Groundwater occurrance
• Geometry of weathered crystalline rock aquifers
• Lithological Logs
• Geoelectrical resistivity
• Principle of electrical resistivity method
• Electrical profiling
• Vertical Electrical Sounding (VES)
• Magnetic Resonance Sounding (MRS)
• Principle of MRS method
• MRS measurements
• MRS parameters and aquifer geometry
• MRS flow related parameters
• MRS storage related parameters
• Hydraulic properties of crystalline rock aquifers
• Lithological logs
• Aquifer tests
• Theoretical estimation of storage
• Determination of aquifer hydraulic parameters
• Derivative analysis
• Hydrogeological conceptual models
• MATERIALS AND METHODS
• Materials
• Methods
• Archived/historical data collection
• Field activities
• Monitoring well construction
• Aquifer tests
• MRS measurements
• Laboratory analyses
• Data analyses
• Litho-stratigraphic analysis
• Use of geoelectrical resistivity (VES) and borehole lithological logs
• Hydraulic parameters analysis
• Laboratory data analysis
• Aquifer test analysis
• MRS data analysis
• Generation of a hydrogeological conceptual model
• PRESENTATION AND DISCUSSION OF RESULTS
• Aquifer characteristics
• Borehole log analysis
• Physio-chemical analysis
• Spatial lithological distribution and basement spatial variation analysis
• Delination of hydrogeologic units using geophysical technique
• Geoelectrical resistivity (VES)
• MRS aquifer geometry
• Comparison of MRS, VES layer model and lithological logs
• Hydraulic properties of aquifers
• Estimates of hydraulic parameters from pedotransfer functions
• Static water level and hydraulic head distribution
• Aquifer tests analysis
• Parameterization of MRS hydraulic parameters
• MRS flow hydraulic parameters
• MRS drainable groundwater storage
• Conceptual hydrogeological model
• DISCUSSION OF RESULTS
• Aquifer Geometry
• Hydraulic properties of aquifers in the region
• Comparison of MRS hydraulic flow parameters
• Conceptual cross-sectional model model
• CONCLUSIONS AND RECOMMENDATIONS
• Conclusions
• Aquifer architecture
• Aquifer hydraulic properties
• Hydrogeological conceptual model
• Recommendations

Zielsetzung und Themenschwerpunkte (Objectives and Key Themes)

This dissertation aims to quantify groundwater storage and assess the geometry of aquifers in weathered crystalline rock formations in northern Uganda. The study uses a combination of geophysical techniques, including magnetic resonance sounding (MRS), electrical resistivity (VES), and borehole lithological logs, to characterize the aquifers and their hydraulic properties.

• Groundwater storage in weathered crystalline rock aquifers
• Aquifer geometry and its relation to groundwater storage
• Hydraulic properties of aquifers, including transmissivity and hydraulic conductivity
• Application of magnetic resonance sounding (MRS) in hydrogeological investigations
• Development of a hydrogeological conceptual model for the study area

Zusammenfassung der Kapitel (Chapter Summaries)

Chapter one introduces the topic of groundwater storage in weathered crystalline rock aquifers and outlines the objectives and significance of the study. Chapter two provides a comprehensive literature review on the geology, hydrogeology, and geophysical techniques used in the research. Chapter three describes the materials and methods used in the study, including the collection of historical data, field activities, laboratory analyses, and data processing. Chapter four presents and discusses the results obtained from the analysis of the collected data, including the characterization of aquifer geometry, hydraulic properties, and groundwater storage. Chapter five summarizes the conclusions drawn from the study and provides recommendations for future research.

Schlüsselwörter (Keywords)

The main keywords and focus topics of the dissertation include: groundwater storage, weathered crystalline rock aquifers, magnetic resonance sounding (MRS), electrical resistivity (VES), aquifer geometry, hydraulic properties, transmissivity, hydraulic conductivity, hydrogeological conceptual model, northern Uganda.