GIS-Based Groundwater Vulnerability and Quality Assessment Using the DRASTIC Model for Sustainable Irrigation Management in the Carmen-Toledo-Compostela Corridor, Cebu, Philippines

1. Introduction 2. Literature Review 2.1 Groundwater Vulnerability Studies 2.2 GIS Applications in Hydrology 2.3 The DRASTIC Model Explained 2.4 Sustainable Irrigation Management 3. Study Area Description 3.1 Geographic Location and Setting 3.2 Climate and Hydrology 3.3 Land Use and Land Cover 3.4 Water Resource Characteristics 4. Methodology 4.1 Data Collection and Sources 4.2 GIS Mapping Techniques 4.3 Application of the DRASTIC Model 4.4 Quality Assessment Techniques 5. Results 5.1 Groundwater Vulnerability Maps 5.2 Quality Indicators Assessment 5.3 Spatial Distribution Analysis 6. Discussion 6.1 Interpretation of Results 6.2 Comparison with Previous Studies 6.3 Implications for Irrigation Management 7. Recommendations 7.1 Strategies for Vulnerability Mitigation 7.2 Improvements in Water Quality 7.3 Policy and Management Approaches 8. Conclusion 8.1 Summary of Findings 8.2 Limitations of the Study 8.3 Directions for Future Research