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Low cost flood early warning systems based on linking local governments and communities in the Philippines
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Low cost flood early warning systems based on linking local governments and communities in the Philippines

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Hilton HERNANDO1, Olaf NEUSSNER2 ...

Hilton HERNANDO1, Olaf NEUSSNER2

1Philippine Atmospheric, Geophysical and Astronomical Service Administration (PAGASA); 2Gesellschaft für Internationale Zusammenarbeit (GIZ), Germany, Federal Republic of

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Low cost flood early warning systems based on linking local governments and communities in the Philippines Low cost flood early warning systems based on linking local governments and communities in the Philippines Presentation Transcript

  • Local flood early warning with low- tech approaches and community involvement for small river basins in the PhilippinesHilton HernandoPhilippine Atmospheric, Geophysical & Astronomical Services Administration (PAGASA)Olaf NeussnerDeutsche Gesellschaft fuer Internationale Zusammenarbeit (GIZ)28 August 2012, Davos, Switzerland 10/23/11 Seite 1Page 1
  • The Philippine Flood Disaster Scene:Hilton Hernando, Olaf Neussner 10/23/11 Seite 2Page 2
  • Monitored / reported floods in the Philippines (1994-2006) PRFFWC ® Cagayan RB – 49 Ilocos Reg incldg Agno RB – 84 Bicol Region incldg Bicol RB – 63 Pampanga RB – 43 Eastern Visayas Area – 118 Southern Tagalog Reg. – 26 Mindanao Area – 47 430 Flood events!!Hilton Hernando, Olaf Neussner 10/23/11 Seite 3Page 3
  • Only 4 major river basins with telemetered FFWS in the country. …and recently in Metro Manila For other basin / watershed areas: LFEWS (or CBFEWS) is the best and preferred alternative.Hilton Hernando, Olaf Neussner 10/23/11 Seite 4Page 4
  • Binahaan Flood Early Warning System Data fro mR ain ve r /Ri Ri ve aa n r Ga ah Bi n P trana as Warn ug ing es Wa rnin to M in Dagami g to M un ic un Tin i pal ic gi ity ip al it y b Wa rning to Ba ranga y Flood-prone Area Binahaan Watershed Ev ning t o Bar ac War an g Warning to Munic ua tio ipa a y n lity Palo ip al ity a ti on M un ic g to E va cu1. Data gathering rni n Wa2. Warning to municipalities3. Warning to villages Operation4. Warning to households Center5. Evacuation TanauanHilton Hernando, Olaf Neussner10/23/11 10/23/11 Seite 5Page 5
  • Risk KnowledgeCommunity-based mapping• familiarity with hazard events (e.g. floods).• Location of households and other assets• GIS overlaid with other (scientific and topographic) maps.Hilton Hernando, Olaf Neussner 10/23/11 Seite 6Page 6
  • Monitoring and Warning - Tipping bucket rain gauge(solar panel, radio link)- Water level gauge read byvolunteer observers- Community volunteer withdisplay of rain sensor on theroofHilton Hernando, Olaf Neussner 10/23/11 Seite 7Page 7
  • Monitoring and Warning Flood Warning Levels Flood is inevitable High probability of flood within some hours Flood coming any time ? Condition (Binahaan River) WL >= 1.5m @ LMWD, WL >= 2.5m @ LMWD WL >= 2.0m @ LMWD or RG >= Flood passed San Benito Flood will be at San 80mm/3h @ LMWD. Bridge and will reach other Benito Bridge in <5 hrs barangays any time.Hilton Hernando, Olaf Neussner 10/23/11 Seite 8Page 8
  • Communication & Dissemination Who needs to do what at the three warning levels? MDRRMO (Operation Centre) Radio, telephone (landline, mobile) Barangay Dev. Council (DRRM Committee) Bells, megaphones, SMS, message HouseholdsHilton Hernando, Olaf Neussner 10/23/11 Seite 9Page 9
  • Communication & Dissemination Municipal Disaster Risk Reduction & Mgt. Office (MDRRMO)• Warn BDRRMCs in flood- • Warn BDRRMCs in flood- • Advice all BDRRCs in flood- prone areas. advice slow prone area . Advice prone areas - Order preparatory activities households prepare for households evacuation & (gather children, animals evacuation: bring emergency pack for etc.) Prepare Emergency Pack at least 5 days• Alert MDRRMOs, SAR - go for 5 days (water and Check evacuated homes on standby, food, cloth, etc.) Head count at evacuation• Inform Police Secure vulnerable items in center• Check status / access to of household • Listen to status report on Evacuation Centers • Prepare and open loacal radio (DYMP)• status reports on lcoal municipal evacuation radio (DYMP) Centers (e.g. lights, water, toilets, medicine, etc.) • Listen to status reports on local radioi (DYMP)Hilton Hernando, Olaf Neussner 10/23/11 Page 10 Seite 10
  • Response Capability Evacuation drills strengthen ownership of communities Drill in Palo, Leyte Drill in St. Bernard, Southern LeyteHilton Hernando, Olaf Neussner 10/23/11 Page 11 Seite 11
  • Response Capability Improved Evacuation CentresHilton Hernando, Olaf Neussner 10/23/11 Page 12 Seite 12
  • Response Capability Search & Rescue Capacity Training Strong Participation of Community MembersHilton Hernando, Olaf Neussner 10/23/11 Page 13 Seite 13
  • LFEWS in action Alert Level 3 Alert Level 2 issued issued Alert Level 3 Water level [m] Many successful warnings lifted were issued by eight LFEWS Very low failure rate (one false alarm only) Flood startsHilton Hernando, Olaf Neussner 10/23/11 Page 14 Seite 14
  • LFEWS in action Community members and government rescue professionals work hand in hand Ormoc, Leyte, 27/28 Dec. 2011Hilton Hernando, Olaf Neussner 10/23/11 Page 15 Seite 15
  • Summary: The establishment of Local Flood Early Warning System and its performance in the Province of Leyte (Philippines)  A LFEWS can costs between 30,000 – 40,000 US$ (Philippines)  Cost Benefit Analysis says this is “profitable” after eight years (less damages than costs)  Run by “non-professionals” but guided by professionals  Population has more time to prepare for floods; damages reduced  Can be replicated in many areas & in other countries  Involvement of volunteers in response strong but weak in data transmittal (a challenge in Philippine settings)Hilton Hernando, Olaf Neussner 10/23/11 Page 16 Seite 16
  • Way forward Flood modelling: Simulation of situations that did not happen yet, in order to be able to prepare for such scenarios. Replication in the Philippines - PAGASA and GIZ will support the establishment of eight more LFEWS.. Networking of LFEWS as one mode of sustainability Multi-hazard approach & Climate ChangeHilton Hernando, Olaf Neussner 10/23/11 Page 17 Seite 17
  • Flood model Ormoc 251.7mm24h 292mm in 3days 525mm/ in 3days 2050 (Theory) 21.06.2008 Typhoon Frank Rise 22cm Sea Level “Juan” 16% more rain (A1B predictions)Hilton Hernando, Olaf Neussner 10/23/11 Page 18 Seite 18
  • Maraming Salamat Po.Hilton Hernando, Olaf Neussner 10/23/11 Page 19 Seite 19