NO. DEPARTMENT OF PUBLIC WORKS AND HIGHWAYS Japan International THE REPUBLIC OF THE Cooperation Agency PHILIPPINES THE STUDY ON FLOOD CONTROL PROJECT IMPLEMENTATION SYSTEM FOR PRINCIPAL RIVERS IN THE PHILIPPINES Under THE PROJECT FOR ENHANCEMENT OF CAPABILITIES IN FLOOD CONTROL AND SABO ENGINEERING OF THE DEPARTMENT OF PUBLIC WORKS AND HIGHWAYS SUPPORTING REPORT SEPTEMBER 2004 GE JR 04-034 THE STUDY ON FLOOD CONTROL PROJECT IMPLEMENTATION SYSTEM FOR PRINCIPAL RIVERS IN THE PHILIPPINES Under THE PROJECT FOR ENHANCEMENT OF CAPABILITIES IN FLOOD CONTROL AND SABO ENGINEERING OF THE DEPARTMENT OF PUBLIC WORKS AND HIGHWAYS ANNEXES SEPTEMBER 2004 LIST OF ANNEXES Annex 1 Flood Damage Data During Destructive Tropical Disturbances … A-1 Annex 2 Flood Damage Data by River Basin .............................................. A-8 Annex 3 Inventory of Hydrological Data Collection .................................... A-28 Annex 4 Station Density of the Streamflow Gauging in Principal River Basins ……………………………………………………… …... A-55 Annex 5 Hydrological Observation Procedures............................................ A-69 Annex 6 Survey Photos on Hydrological Observation ................................. A-78 Annex 7 Functions and Roles of NEDA Secretariat in the Central Office ... A-96 Annex 8 Sustainable Development of Laguna de Bay Environment (SDLBE) Project............................................................................. A-100 Annex 9 Flood Forecasting and Warning System for Dam Operation ........ A-109 Annex 10 Organizational Charts of Bureaus of DPWH ................................. A-114 Annex 11 Project Summary on Community Based Approach in Reforestation ................................................................................. A-125 Annex 12 Survey on the Qualifications of Local Consultants and Contractors for Flood Control Projects …………………………. A-129 Annex 13 List of Flood Control, Irrigation, Watershed Management and Related Projects Implemented by the National Agencies............... A-134 Annex 14 Process and Outline of PCM Workshop 1 .................................... A-152 Annex 15 Information Regarding PCM Workshop 2 Attached to the Letter of Invitation.......................................................................... A-153 Annex 16 Problem Trees from PCM Workshop 1 .......................................... A-164 Annex 17 Responses to Survey Questions in PCM Workshop 2.................... A-174 Annex 18 Information Regarding Seminar on Flood Control in Japan…… A-191 Annex 1 Flood Damage Data During Destructive Tropical Disturbances Annex 2 Flood Damage Data By River Basin Annex 2 Affected Rivers/Basins/Watersheds and Infrastructure Damages Recorded for the Last 15 years (1/14) TS RUPING Date of Occurrence: November 10-14, 1990 Affected Regions: IV, V, VI, VII, VIII, IX, X, XI and XII Affected Areas: 9 Regions, 46 Provinces, 247 Municipalities, 42 Cities and 1,387 Barangays Population Affected: Families – 1,010,004; Persons – 5,498,290 Casualties: Dead – 508; Injured – 1,278; Missing – 246 Houses Damaged: Totally – 222,026; Partially - 630,885 Cost of Damages: P 10,846.07 M - Infrastructures - P1,326.345 M Agriculture - P8,511.537 M Pvt. Properties - P964.814 M Affected rivers/basins/watersheds: Casulaties Province River/basin/watershed Affected Towns (dead) Negros Occ. 58 Ilog and Hilabangan rivers Murcia, Sipalay, Silay City 2 Hinobaan, Silay City, Bacolod City 1 Bago City, Cadiz City, Bago City 3 Bacolod City, Victorias Cadiz City 3 Guimaras 4 Iloilo 26 Jaru and Jalaud watersheds Iloilo City 2 Capiz 13 Panay-Mambusao and Dumalag watersheds Roxas City 1 Antique 7 Cangaronan and Sibalom river watersheds Aklan 6 Aklan and Ibajay river watersheds Cebu 82 Balamban, Carmen and Mananga river Asturias, Balamban, Cebu City 45 watersheds Cordova, Danao City, Mandaue City 7 Mandaue City, Cebu Lapu-lapu City 2 City, Lapu-lapu City Danao City 2 Negros Oriental 56 Tanjay, Siaton, Bayawan & Pagatban river Tanjay, Mabinay, Dumaguete City 2 watersheds Guihulngan, Pamplona Bais City 1 Bohol 23 Talibon-Ipil, Inabanga-Wahig, Antiquerra- Ubay, Talobon, Loboc, Siniganan and Loboc watersheds Dagohoy Siquijor 1 Leyte – 20 20 Tolosa, Mayorga, Mc Tacloban City 1 Arthur, Merida, Javier, Ormoc City 5 Anilao and Malbasag rivers Abuyog, Mahaplag, Bato, Baybay, Hindang, Isabel, Hilongos, Matalom, Sogod Palompon, Inopacan Southern Leyte 22 Sogod watershed Eastern Samar 4 Oras, Dolores, Balangiga, Taft watersheds Agusan del Norte 10 Lake Mainit-Cabadbaran, Agusan River Butuan City, Surigao del Norte Lake Mainit-Cabdbaran river basin Dinagat and Siargao Surigao City 37 2 Bukidnon 1 Pulangi watershed Misamis Or. 29 Tagoloan and Iponan watersheds Tagoloan, Sto. Nino Gingoog City 3 Camiguin 3 Davao del Sur 3 Padada river watershed South Cotabato 2 Buluan Lake river watershed Lake Sebu Zamboanga del Sur 1 Sibangan, Sibuguey and Labangan watersheds Siayan and Sindangan Total 508 A-8 Damaged Infrastructures: Mactan Bridge – connecting Cebu and Mactan island Murcia Road (84 kms) - Municipality of Murcia, Negros Occidental 8 meters of embankment – Tagoloan, Misasmis Oriental Around 129 interisland private and government owned vessels/ships sunk/capsized/damaged. Since TY Ruping had generated high and big waves, 383 fishing boats/bancas (motorized and non-motorized) were washed ashore/over turned and were reported missing. Subsequent flooding caused by heavy rains and strong winds totally cut off supply of basic necessities. Power and communication lines were destroyed by strong winds and floodwaters in Mindoro Oriental (affecting 15 towns), Negros Occidental, Iloilo, Bacolod City, Cadiz City, Antique, Cebu City, Surigao del Norte, Surigao del Sur (12 towns), Bohol, Leyte and Samar provinces. Major and small rivers swelled and inundated several areas such as low-lying towns and shores of Negros Occidental, Surigao del Norte, Misamis Oriental. Samar, Leyte, Cebu and Bohol. In Tagaloan, Misamis Oriental, 8 meters of river embankment gave way due to strong water current of the Tagoloan river. In Bohol, rivers overflowed and numerous coconut trees, banana plantations, corn and other crops were washed out. The areas that bore the brunt of TY Ruping were the shorelines and river systems as several fishing boats and fishermen were lost. Some of the casualties were electrocuted, or swept by floodwaters or buried by landslides. A-9 Annex 2 Affected Rivers/Basins/Watersheds and Infrastructure Damages Recorded for the Last 15 years (2/14) TS URING Date of Occurrence: November 2-6, 1991 Affected Regions: VI & VIII Population Affected: Families – 43,397; Persons – 223,985 Casualties: Dead – 5,101; Injured – 293; Missing – 4,256 Houses Damaged: Totally – 5,232; Partially – 25,272 Cost of Damages: P 1,044.30M – Infrastructure - P513.318 M Agriculture - P 531.05 M Affected rivers/basins/watersheds: Casualties Affected Region Province Affected Municipalities/ Barangays (dead) River/basin/watershed Region VI Antique - Cangaronan and Sibalom 10 / 19 Negros Occidental 28 river watersheds 19 Barangays & 4 municipalities: Calatrava, Bacolod City 2 Ilog and Hilabangan rivers La Castellana, Murcia & Pulupandan and 4 Bago City 60 cities: Bacolod, Bago, La Carlota and San La Carlota City 10 Carlos San Carlos City 10 Region VII Asturias, Balamban, Cordova, Danao City, Cebu (shoreline) 4 Balamban, Carmen and Mandaue City, Cebu City, Lapu-lapu City Bohol (shoreline) 44 Mananga rivers Region VIII Leyte 388 3 / 256 Ormoc City 4,555 Anilao and Mabasag rivers Tacloban City - TOTAL 5,101 Damaged Infrastructures: Region VIII 18 bridges were destroyed isolating the towns of Albuera, Dulag, Burawen & Julita 7 bridges suffered severe damage due to scoured approaches. 18 minor river banks protection were likewise damaged. Almost all barangays in Ormoc City were washed out. Region VI Roads and bridges were damaged along Bacolod-Murcia-Don Salvador Benedicto-Calatrava national road. Flood control structures damaged were manta-Angan seawall, Pasil concrete river bank protection, Calatrava port and Sagay river conctrete seawall. In La Castellan, 2 bridges were totally washed out while in Bago City, 1 bridge was partially destroyed. Cogon and Punta bridges in Ormoc City were washed out by flashfloods. The catastrophe in Ormoc City can be attributed to the following factors: a. The concentration of unusually heavy and intense rainfall brought about by TY Uring; b. The drainage pattern - dendritic river system – the river basin is characterized by numerous tributaries rendering a common concentration time causing floodwaters to converge almost at the same time; c. The physiographic profile of the watersheds – the loose and unstable soil resulted to massive erosion producing a lot of debris which accumulated and eventually clogged the pathway of floodwaters at the Cogon and Punta bridges and resulted into a temporary damming effect; and d. The flashflood which resulted from the damming effect coincided with the high tide in Ormoc Bay. A-10 Annex 2 Affected Rivers/Basins/Watersheds and Infrastructure Damages Recorded for the Last 15 years (3/14) TD DITANG Date of Occurrence: July 17 – 21, 1992 Affected Regions: III & NCR Population Affected: Families – 27,902; Persons – 134,417 Casualties: Dead – 36; Injured – 6; Missing – 77 Houses Damaged: Totally – 478; Partially – 1,305 Cost of Damages: P 471.00M Affected rivers/basins/watersheds: Region / Casualties Affected Affected Municipalities/ Barangays Province (dead) River/basin/watershed Zambales Botolan and San Marcelino 5 barangays