C. Screening and Implementation Schedule The Study on the Nationwide Flood Risk Assessment and the Flood Supporting Report C Mitigation Plan for the Selected Areas in the Republic of the Philippines Table of Contents Table of Contents Page 1 FIRST SCREENING................................................................................................................................C-1 1.1 Procedure of the First Screening .......................................................................................................C-1 1.2 Identifications of River Basins..........................................................................................................C-2 1.2.1 Basic Data and Information for Identification of River Basins..................................................C-2 1.2.2 Other River Basins .....................................................................................................................C-3 1.2.3 River Basins Covering the Flood Susceptible Areas..................................................................C-3 1.3 Confirmation of Methodology of the First Screening .......................................................................C-4 1.3.1 Method Adopted in Previous Studies .........................................................................................C-4 1.3.2 Selection of Methodology ..........................................................................................................C-6 1.4 Selection of Evaluation Indexes........................................................................................................C-7 1.4.1 Indexes for Socio-economic Conditions ....................................................................................C-7 1.4.2 Indexes for Natural Conditions ..................................................................................................C-8 1.5 Arrange of Data for Indexes and Scoring..........................................................................................C-8 1.5.1 Data Collection...........................................................................................................................C-8 1.5.2 Data Arrangement ......................................................................................................................C-9 1.5.3 Determination of Maximum Score.............................................................................................C-9 1.5.4 Distribution of Score ................................................................................................................C-10 1.6 Preliminary Selection for the First Screening .................................................................................C-13 1.6.1 Scoring Results.........................................................................................................................C-13 1.6.2 Issues of Scoring ......................................................................................................................C-14 1.6.3 Guideline on Preliminary Selection for the First Screening.....................................................C-14 1.6.4 Preliminary Selection of River Basins through the First Screening.........................................C-15 2 SECOND SCREENING AND IMPLEMENTATION SCHEDULE .....................................................C-17 2.1 Objective and Procedure of the Second Screening..........................................................................C-17 2.1.1 Objective of the Second Screening...........................................................................................C-17 2.1.2 Procedure of the Second Screening..........................................................................................C-17 2.2 Basic Analysis for the Second Screening ........................................................................................C-18 2.2.1 Analysis for Cost Index ............................................................................................................C-18 2.2.2 Analysis for Benefit Index........................................................................................................C-20 2.2.3 Scoring and Ranking of 120 River Basins ...............................................................................C-29 2.2.4 Analysis for Investment Amount..............................................................................................C-31 2.3 Selection of the River Basins through the Second Screening..........................................................C-31 2.3.1 Key Points Considered for the Second Screening....................................................................C-31 2.3.2 Process for the Second Screening.............................................................................................C-32 JICA CTI Engineering International Co., Ltd. C-i Supporting Report C The Study on the Nationwide Flood Risk Assessment and the Flood Table of Contents Mitigation Plan for the Selected Areas in the Republic of the Philippines 2.3.3 Selection of River Basins through the Second Screening ........................................................C-33 2.4 Prioritization and Arrangement of Implementation Schedule .........................................................C-33 2.4.1 Implementation Period .............................................................................................................C-34 2.4.2 Classification of River Basins ..................................................................................................C-34 2.4.3 Implementation Schedule.........................................................................................................C-36 3 DATA UPDATE .....................................................................................................................................C-37 3.1 Utilized Data and Software .............................................................................................................C-37 3.2 Update of Data ................................................................................................................................C-37 C-ii JICA CTI Engineering International Co., Ltd. The Study on the Nationwide Flood Risk Assessment and the Flood Supporting Report C Mitigation Plan for the Selected Areas in the Republic of the Philippines Table of Contents List of Tables Table Table C. 1.1 Total Number of River Basins .........................................................................................C-3 Table C. 1.2 FVI Indicators Applied in the Philippines........................................................................C-5 Table C. 1.3 Evaluation Indexes for Socio-Economic Conditions.......................................................C-8 Table C. 1.4 Evaluation Indexes for Natural Conditions......................................................................C-8 Table C. 1.5 Significant River Basins ................................................................................................C-10 Table C. 1.6 River Basins from Viewpoint of Guideline....................................................................C-16 Table C. 1.7 Category of River Basins...............................................................................................C-16 Table C. 2.1 Examples of Urban River Basin ....................................................................................C-19 Table C. 2.2 Distribution of the Score................................................................................................C-30 Table C. 2.3 Relationship between DPWH Growth Rate, Available Budget and Number of Achievable Projects ................................................................................................................................C-32 Table C. 2.4 Medium-Term Investment Program (2005-2010)..........................................................C-34 Table C. 2.5 Classification of River Basins........................................................................................C-35 List of Figures Figure Figure C. 1.1 Procedure of the First Screening .......................................................................................C-1 Figure C. 2.1 Basic Procedure of Second Screening ...........................................................................C-17 Figure C. 2.2 Estimated Line with Relationship between Design Discharge and Project Cost...........C-20 Figure C. 2.3 Flood Area Ratio and Basin Area...................................................................................C-22 Figure C. 2.4 Comparison between Medium-Term Investment Program and Actual Investment Amount C-31 Figure C. 2.5 Procedure of Prioritization.............................................................................................C-35 List of Tabs. Tab. Tab. C-1-1 List of Flood Susceptible Areas Nominated by NDCC in 2004 ............................... C-T-1 Tab. C-1-2 Principal River Basins .............................................................................................. C-T-6 Tab. C-1-3 Major River Basins ................................................................................................... C-T-6 Tab. C-1-4 List of Major River Basins and Principal River Basins ............................................ C-T-7 JICA CTI Engineering International Co., Ltd. C-iii Supporting Report C The Study on the Nationwide Flood Risk Assessment and the Flood Table of Contents Mitigation Plan for the Selected Areas in the Republic of the Philippines