The document summarizes flooding issues in Jakarta and proposed solutions. It discusses the increasing urbanization putting pressure on land and increasing surface runoff. The 2007 floods inundated large areas after heavy rainfall. Short term measures include dredging canals and improving dikes. Long term solutions involve tackling issues like subsidence, sea level rise due to climate change, and better spatial planning. A water knowledge center is proposed to provide expertise and coordination to address Jakarta's complex flooding challenges.

1. Jakarta Floods Hongjoo Hahm World Bank JanJaap Brinkman Deltares - Delft Hydraulics 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

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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

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

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

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

47. Part 5 Actions and Financing mechanism The World Bank

51. Jakarta Floods Hongjoo Hahm World Bank JanJaap Brinkman Deltares – Delft Hdraulics Thank you! The World Bank