Jakarta Flood Donor Presentation

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Jakarta Flood Donor Presentation

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

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