9.2 General research methodology -- 9.2.1 Water network -- 9.2.2 Cost of management, operation and maintenance -- 9.3 The management unit and water distribution -- 9.3.1 Balanac RIS -- 9.3.2 Sta. Maria RIS -- 9.4 Mapping the services and demand -- 9.5 Field investigation of potentials for conjunctive use -- 9.6 Conclusions -- 10: OPTIONS AND VISION FOR IRRIGATION SYSTEM MODERNISATION PLAN -- 10.1 Introduction -- 10.2 General methodology -- 10.3 Modernisation options for Balanac RIS -- 10.3.1 System management -- 10.3.2 Physical system -- 10.4 Modernisation options for Sta. Maria RIS -- 10.4.1 System management -- 10.4.2 Physical system -- 10.5 Visions for system modernisation -- 10.5.1 Balanac RIS -- 10.5.2 Sta. Maria RIS -- 10.6 Development of a modernisation plan for NIS -- 10.7 Conclusion -- 11: EVALUATION -- 11.1 Introduction -- 11.2 Key findings -- 11.2.1 Nature and impacts of rehabilitation in terms of closing the gap between the actual area irrigated and irrigation service area -- 11.2.2 Efficacy of the physical structure and operations of irrigation systems to deliver the design rate, duration and frequency of irrigation water -- 11.2.3 To assess the validity of design values for dependable water supply, crop water requirement and percolation -- 11.2.4 Identification of modernisation options for existing NIS service area -- 11.2.5 Investigation of the potentials of shallow tubewell irrigation in the part of NIS service areas that cannot be fully irrigated with surface water as designed -- 11.2.6 Identification of possible options of integrating conjunctive use of groundwater and surface water in the formulation of modernisation plans for NIS -- 11.3 Strategy to formulate a NIS modernisation plan -- 11.4 Challenges -- 11.5 Recomendations -- 11.6 Future activities -- 11.7 Conclusion -- 12: REFERENCES -- ANNEXES -- Annex A. List of symbols