Modernisation Strategy for National Irrigation Systems in the Philippines Balanac and Sta. Maria River Irrigation Systems IHE Delft PhD Thesis Series

The book presents documentary evidence of the insufficiency of rehabilitation works to close the gap between the irrigation service and actual area irrigated of publicly funded national irrigation systems in the Philippines. It outlines a methodology for formulating a modernisation plan for national irrigation systems with focus on the mostly ungauged, medium to small canal irrigation systems. The proposed methodology adaptively modified some known modernisation concepts and techniques and integrated them in a more holistic framework in the context of changing weather patterns and river flow regimes. It includes in-depth review of rehabilitation works; system diagnosis; revalidation of design assumptions on percolation and water supply; characterisation of system management, irrigation service and demand; and drawing up of options and a vision for the modernised irrigation systems. Central to the proposed modernisation strategy is the logical coherence among the design of physical structures, system operation and water supply so that improvements of irrigation service are possible. The book discusses the development of the proposed methodology and demonstrates its utility in two case study irrigation systems.

Introduction, background and objectives
Description of the Philippines and irrigation systems of the case study
Issues and concepts on designs and performance of irrigation systems
Assessment of irrigation systems
Rehabilitation of national irrigation systems
Diagnostic assessment of irrigation system design and performance
Revalidation of design assumptions on percolation and water supply
Characterisation of the system management, services and demand
Options and vision for irrigation system modernisation
Evaluation and ways forward

Mona Liza Delos Reyes is a licensed agricultural engineer with specialisation in irrigation engineering. She holds a senior university researcher position at the University of the Philippines and has more than 15 years experience in development and implementation of irrigation-related applied research, projects and action programs. She has worked as projects leader, irrigation specialist, consultant in a number of irrigation studies, projects and programs funded by the Philippine government and international financial institutions.