Session6 jan jaap brinkman deltares
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The document discusses strategies for protecting Jakarta from flooding and subsidence. It notes that Jakarta is experiencing rapid subsidence of up to 17 cm per year due to excessive groundwater extraction. A key strategy is the Jakarta Coastal Defense Strategy (JCDS) which involves building coastal defenses and reducing subsidence. Left unchecked, modeling predicts subsidence could reach 2.2 meters by 2100. The strategies aim to synchronize coastal protection, subsidence mitigation and transportation infrastructure development to promote a safe and resilient Jakarta.
Session6 jan jaap brinkman deltares
- 1. Excellent opportunities Rapid expansion of Jakarta for Jakarta 2000 - 2025 Jakarta Coastal Defence Strategy (JCDS) study Ports & Logistics business forum October 10, 2011 Protection of Jakarta and New Harbour Logistics JanJaap Brinkman, Deltares Integrated GOI-GON Delta approach Floods from the sea - Subsidence Pluit - November 26, 2007 Jakarta Coastal Defense Strategy Floods from the sea ‘ROB’ Protection against subsidence 1
- 2. ESA – Jakarta subsidence Subsidence Map Subsidence map of Jakarta 1974-2010: Total subsidence -25 up to -400 cm ; rate -0.5 up to -17 cm/year -4,1 meter First recorded of leveling -2,1 meter data were in 1974. Base -1,4 meter -0,7 meter on acumulated data, interpolation and extrapolation we can make subsidence map of Jakarta Up to 10 cm/year from year 1974 up to 2010. -0.25 meter Base on latest analysis of piezometric Up to 18 cm/year surface data found that initial condition of subsidence were probably on 1965. In this case in the near future we will try to modeled subsidence map of Jakarta Up to 12 cm/year for year 1965 up to 2011 Jakarta Coastal Defence Strategy (JCDS) Study Heri Andreas 2011 The elevated highway and protecting dike to Sukarno Hatta FUTURE LAND SUBSIDENCE JAKARTA Without at least 15 closures 2008 - 2010 PERIOD 2010-2030 (linear trend, no act on stopping GW extraction) 2
- 3. Future Subsidence of Jakarta Protection against floods from the sea Simulated future subsidence at Daan Mogot area (DNMG GPS Points) “Large scale intervention required for a Even though last water load is in 2010, the subsidence may continue with time to at least 2100 where the value may reached 2,2 meter from 2010. resilient Jakarta” If drawdown increases 5 meter every 5 years after 2010 to 2030, therefore it Pluit 1989-2007 2007-2025 Total will lead to subsidence by 2030 with the value of 3,2 meter, and by 2100 with Sea level rise 4-6 cm 4-6cm 8-12 cm the value of 5,7 meter from 2010. Minimum 100-200 cm 100-200 cm 200-400 cm Subsidence Effects of Piezometric Head Recovery to 1995 value (15 meter recovery) by 2015 will expected to give subsidence in 2100 with the value of 1,5 meter from 2010 Effects of Piezometric Head Recovery to maximum head of the 3 aquifers of 1995 values (i.e., -23 m head) by 2015 will expected to give subsidence in 2100 with the value of 1,2 meter from 2010 Jakarta Coastal Development Strategy Defense Option 3 Offshore with main floodways closed CFW Future polder area Option 3: WBC EBC Offshore with main Higher land rivers closed Area of area DKI Jakarta 13 Rivers 3
- 4. Jakarta Bay Northern connection Combination of Functions: New ‘free’ road-rail harbour connections Harbour towards deeper water Road System Development • planned road Car and trucks system for 2030 Heavy and light rail • need for integrated development • Synchronize road map and JCDS Thank you! From Coastal Defence to Coastal Development but always Towards a safe and resilient Jakarta 4
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