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. Cover -- Half Title -- Title Page -- Copyright Page -- TABLE OF CONTENTS -- DEDICATION -- ACKNOWLEDGEMENTS -- 1: INTRODUCTION -- 1.1 General -- 1.2 Structure of the thesis -- 2: BACKGROUND AND OBJECTIVES -- 2.1 Irrigation in global perspective -- 2.2 Irrigation in the Philippines -- 2.2.1 History of irrigation -- 2.2.2 Present level of irrigation development -- 2.2.3 Other irrigation related issues -- 2.3 Description of the research problem -- 2.4 Research questions -- 2.5 Research hypothesis -- 2.6 Research objectives -- 2.7 General research methodology -- 3: DESCRIPTION OF THE PHILIPPINES AND IRRIGATION SYSTEMS OF THE CASE STUDY -- 3.1 Brief hydro-geographic description and general climatic conditions -- 3.2 Economy and agriculture -- 3.3 Water and land resources utilization for irrigation -- 3.3.1 Land resources -- 3.3.2 Water resources -- 3.4 Description of irrigation systems of the case study -- 3.4.1 Balanac River Irrigation System -- 3.4.2 Sta. Maria River Irrigation System -- 4: ISSUES AND CONCEPTS ON DESIGN AND PERFORMANCE OF IRRIGATION SYSTEMS -- 4.1 Historical perspective on the causes of and solutions to poor irrigation performance -- 4.2 Design issues -- 4.3 Concepts on irrigation design -- 5: ASSESSMENT OF IRRIGATION SYSTEMS -- 5.1 Approaches to analyze the hydraulic behaviour of irrigation systems -- 5.2 Overview of the performance assessment of irrigation systems -- 5.3 General framework for assessing irrigation performance -- 5.3.1 Diagnostic assessment -- 5.3.2 Rapid Appraisal Procedure -- 5.3.3 The MASSCOTE approach -- 5.4 Conclusion -- 6: REHABILITATION OF NATIONAL IRRIGATION SYSTEMS -- 6.1 Overview on rehabilitation -- 6.2 General methodology -- 6.3 Definition of terminologies -- 6.4 Magnitude and impacts of rehabilitation or improvement projects -- 6.5 Planning and implementation process of rehabilitation projects