Jakarta Flood Donor Presentation

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  • 1. Jakarta Floods Hongjoo Hahm World Bank JanJaap Brinkman Deltares - Delft Hydraulics The World Bank
  • 2. Jakarta flood management
    • Part 1: The basics - Spatial Planning
    • Part 2: The flood of February 2007
    • Part 3: No-regret measures
    • Part 4: Tide and High tide floods
    • Part 5: Water specialist center, short-term actions
    • Part 6: Actions and financing structure
    The World Bank
  • 3. Part 1 The basics: Spatial planning “We live in a changing world” The World Bank
  • 4. Total urban area % (java-bali spatial plan) 2000 - 2025
  • 5. Total urban area % (java-bali spatial plan) 2000 - 2025
  • 6. It is really happening Landuse, Jabodetabek 1992 2002
  • 7. It is really happening Urban area, G. Pangrango 1992 - 2001 The World Bank
  • 8. Land-use & Rainfall runoff (Katulampa) 0 400 0 0.9 m3/s m3/s Fast runoff Urban Slow runoff Non-Urban The World Bank
  • 9. Part 2 Flood February 2007 Hydrology The World Bank
  • 10. Daily rainfall Feb 2 Feb 1; 07:00 – Feb 2; 07:00 The World Bank
  • 11. Daily rainfall Feb 4 Feb 3; 07:00 – Feb 4; 07:00 The World Bank
  • 12. Inflow Ciliwung Febr 2007 Katu Lampa - Manggarai 1 2 3 5 6 7 8 9 10 13 12 14 15 11 16 4 17 6 Katu Lampa The World Bank
  • 13. Flood February 2007 Hydraulics & Flood extent
    • Unique
    • “ Complete upstream-downstream flood modelling framework now available for all major drainage including all 13 rivers”
    The World Bank
  • 14. The World Bank
  • 15. The World Bank
  • 16. The World Bank
  • 17. The World Bank
  • 18. West Banjir canal
  • 19. Part 3 No-regret ST Measures Rehabilitation “ Restore original-available design capacity ” -Dredging -Dike improvement The World Bank
  • 20. 1 August 2007 C: River Embankment Rehabilitation 1. Confirmation of Scope of Works West Banjir Canal – Longitudinal Section The World Bank
  • 21. 1 August 2007 C: River Embankment Rehabilitation 1. Confirmation of Scope of Works Cengkareng Floodway – Longitudinal Section The World Bank
  • 22. A: Urgent Maintenance Dredging 1. Scope of Works National Importance
  • 23. West banjir canal design
  • 24. No-regret ST Measures “ East-Banjir Canal ” The World Bank
  • 25.
    • Stepwise approach:
      • Cipinang-Sunter-Buaran-Cakung
      • (With increased Cipinang-Sunter capacity)
      • Finish EBC-NE stretch
      • Optimize Manggarai gate
      • Connect with Ciliwung
    WBC EBC Cakung Sunter Cipinang Manggarai Ciliwung
  • 26. Increase capacity
  • 27. Increase capacity
  • 28. No-regret ST Measures EBC-CAK-CIL-Manggarai Simulation 2007 The World Bank
  • 29. Existing – flood 2007
  • 30. EBC-CAK-CIL-Manggarai
  • 31.  
  • 32. Part 4 Tidal analysis High Tide floods The World Bank
  • 33. Animation of tide in South China Sea
  • 34. Animation of tide in western Java Sea
  • 35. Spring tide analysis
    • Prediction based on analysed tidal constituents Tanjung Priok
    • Only spring tides are plotted
    • Upper plot: 18.6 year cycle caused by eliptical orbit moon
    • Lower plot: semi-annual cycle presumably caused by interaction diurnal and semi-diurnal spring-neap cycle
    Astronomic tide Sea level anomaly
  • 36. Flood event June 2007
    • Increase in water level due to MSLA
    • Spring tide (at semi-annual high)
    flooding reported at June 14, ~10.00 pm February 2007, not exceptional The World Bank
  • 37. Future high spring tides Next semi-annual high spring tide: October 29, November 26, December 24 -2007, January 21 Following semi-annual high spring tide: June 4, 2008  Month with the highest average MSLA! The World Bank
  • 38. November 26, 2007
  • 39. Subsidence The World Bank
  • 40. 1980 2003 Land-use change The World Bank
  • 41. Pluit 1989, 2007, 2025 (Positive view) Pasar Ikan cm Nov 1989 Nov 2007 Nov 2025 Nov 26, 2007 Oct 29, 2007 subsidence 40-60 cm 40-60 cm Climate change Sea level rise subsidence Critical level 2007 The World Bank 240 cm 190 cm 140 cm 215 220 225
  • 42. Pluit 1989, 2007, 2025 (Positive view) Pasar Ikan cm Nov 1989 Nov 2007 Nov 2025 Nov 26, 2007 Oct 29, 2007 subsidence 40-60 cm 40-60 cm Climate change Sea level rise subsidence 2025: 80-100 cm increase 18.6 year cycle Critical level 2007 Sea level Nov 26 The World Bank 240 cm 190 cm 140 cm 215 220 225
  • 43. High tide floods 2007: “Signs of a sinking Jakarta” The World Bank
  • 44. Jadebotabek Water Resources Management Study (JWRMS,1994) The World Bank
  • 45. Part 5 “ Strong knowledge base ” “Short-term action” The World Bank
  • 46.
    • Still a lot of confusion!!
      • Who is right?
      • Who is going to solve this?
      • Who dares to make decision?
    • One storey from specialists required!
    • “ Water knowledge center” for DKI - Jabodetabek
    Flood Hazard Mapping The World Bank
  • 47. Part 5 Actions and Financing mechanism The World Bank
  • 48. ACTION PLAN
    • Short Term:
      • Dredging / East Banjir Canal / Manggarai Gate
      • Stop Ground Water Extraction (industrial)
      • Early Warning System
      • Strict Building Codes
    The World Bank
  • 49. ACTION PLAN
    • Medium Term:
      • Bulk Water Supply
      • Stop Ground Water Extraction (household)
      • Solid Waste Management
      • Low Income Housing / Slum Improvement
    The World Bank
  • 50. ACTION PLAN
    • Long Term:
      • Water Quality
      • Water Retention Basin / Catchment Area / Sea Defense
      • Land Use and Spatial Planning
    The World Bank
  • 51. Jakarta Floods Hongjoo Hahm World Bank JanJaap Brinkman Deltares – Delft Hdraulics Thank you! The World Bank