OVERVIEW of TYPHOON ULYSSES Presentor: Mr

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OVERVIEW OF TYPHOON ULYSSES Presentor: Mr. SOCRATES PAAT, JR. (Senior Hydrologist, PAGASA) Typhoon Ulysses (International Name: Vamco) 20th tropical cyclone that entered the PAR in 2020 Maximum wind speed reached: 155 km/h (Typhoon Category) Made 3 landfalls in Central Philippines - 1st & 2nd: small island Municipalities (Patnanungan/Burdeos, Quezon) - 3rd : Gen. Nakar, Quezon (main Island of Luzon) PALAU 1 EFFECTS OF THE PASSAGE OF TYPHOON ULYSSES Big floodings in 4 Major River Basins: (1) CAGAYAN (2) PAMPANGA (3) PASIG-MARIKINA (4) BICOL (1) CAGAYAN RIVER BASIN Biggest among the 18 Major River Basins Drainage Area: With 1 Multi-purpose Dam (Magat Dam) 27,280 km2 Drainage Area: 4,143 km2 3 MAGAT DAM RELEASES DUE TO TY. ULYSSES 4 SIMULATION RESULT OF INUNDATION DUE TO TY. ULYSSES CAGAYAN (Courtesy of ICHARM) CAGAYAN ISABELA DETECTED FLOODS BY SENTINEL 1B ISABELA Sentinel-1 SAR RRI Simulation RRI Simulation (ground gauge) (GSMaP) RRI Simulation (Corrected GSMaP) 5 (2) PAMPANGA RIVER BASIN (Courtesy of PRBFFWC-PAGASA) (Courtesy of AIT; Sentinel Asia; JAXA) 6 (2) ANGAT DAM (A SUB-SYSTEM WITHIN THE PAMPANGA RIVER BASIN) 7 (3) PASIG-MARIKINA RIVER BASIN (3) PASIG-MARIKINA RIVER BASIN Source: NDRRMC and various media outlets 8 • PASIG-MARIKINA RIVER BASIN COMPARISON WITH TY. ONDOY (KETSANA 2009) • In Terms of Rainfall… • In Terms of Water Level… 9 • PASIG-MARIKINA RIVER BASIN COMPARISON WITH TY. ONDOY (KETSANA 2009) • … ONDOY • … ULYSSES 10 (Source: Various Media Outlets) (4) BICOL RIVER BASIN TEMPORAL RAINFALL DISTRIBUTION 2-day concentration of rainfall BASIN MEAN RAINFALL (mm) 11 BICOL RIVER BASIN / REGION HIT BY 5 OF THE 7 CYCLONES THAT AFFECTED THE COUNTRY IN ONE MONTH TIME… TROPICAL MAXIMUM DURATION NUMBER OF CYCLONE CATEGORY CASUALTIES 1. Ofel Tropical Depression 13-16 Oct 0 2. Pepito (Saudel) Typhoon 19-22 Oct 0 3. Quinta (Molave) Typhoon 23 - 27 Oct 27 4. Rolly (Goni) Super-Typhoon 27 Oct - 3 Nov 25 5. Siony (Atsani) Severe Tropical Storm 29 Oct - 6 Nov 0 6. Tonyo (Etau) Tropical Storm 7 - 9 Nov 0 7. Ulysses (Vamco) Typhoon 8 - 13 Nov 73 Note: The black dot indicates the location of Bicol Region. 12.

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