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JanJaap Brinkman, Deltares

Integrated GOI-GON Delta approach

Jakarta Coastal DefenceStrategy (JCDS) study

Ports & Logistics business forumOctober 10, 2011

Protection of Jakarta andNew Harbour Logistics

Excellent opportunitiesfor Jakarta

Rapid expansion of Jakarta

2000 - 2025

Floods from the sea - Subsidence

Pluit - November 26, 2007

Jakarta Coastal DefenseStrategy

Floods from the sea ‘ROB’Protection against subsidence

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ESA – Jakarta subsidence

Up to 18 cm/year

Up to 10 cm/year

Up to 12 cm/year

Jakarta Coastal Defence Strategy (JCDS) Study Heri Andreas 2011

Subsidence Map

Subsidence map of Jakarta 1974-2010:

-4,1 meter

-1,4 meter-2,1 meter

-0,7 meter

-0.25 meter

Total subsidence -25 up to -400 cm ; rate -0.5 up to -17 cm/year -4,1 meter

-2,1 meter-1,4 meter

-0,7 meter

-0.25 meter

First recorded of levelingdata were in 1974. Base

on acumulated data,interpolation and

extrapolation we can makesubsidence map of Jakartafrom year 1974 up to 2010.

Base on latest analysis of piezometricsurface 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 Jakartafor year 1965 up to 2011

The elevated highway andprotecting dike to Sukarno Hatta

Without at least 15 closures2008 - 2010

FUTURE LAND SUBSIDENCE JAKARTA

PERIOD 2010-2030 (linear trend, no act on stopping GW extraction)

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Future Subsidence of JakartaSimulated future subsidence at Daan Mogot area (DNMG GPS Points)

Even though last water load is in 2010, the subsidence may continue with timeto at least 2100 where the value may reached 2,2 meter from 2010.

If drawdown increases 5 meter every 5 years after 2010 to 2030, therefore itwill lead to subsidence by 2030 with the value of 3,2 meter, and by 2100 withthe value of 5,7 meter from 2010.

Effects of Piezometric Head Recovery to 1995 value (15 meter recovery) by2015 will expected to give subsidence in 2100 with the value of 1,5 meter from2010

Effects of Piezometric Head Recovery to maximum head of the 3 aquifers of1995 values (i.e., -23 m head) by 2015 will expected to give subsidence in 2100with the value of 1,2 meter from 2010

Protection against floods from the sea

“Large scale intervention required for aresilient Jakarta”

Pluit 1989-2007 2007-2025 Total

Sea level rise 4-6 cm 4-6cm 8-12 cm

MinimumSubsidence

100-200 cm 100-200 cm 200-400 cm

Option 3

Offshore with main floodwaysclosed

Area ofDKI Jakarta

13 Rivers

EBCWBC

Futurepolder area

Higher landarea

CFW

Jakarta CoastalDefense Strategy

Option 3:Offshore with main

rivers closed

Development

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Jakarta Bay Northern connectionNew ‘free’ road-rail harbour connections

Harbour towards deeper water

Car and trucks

Heavy and light rail

Combination of Functions:Road System Development

• planned roadsystem for 2030

• need for integrateddevelopment

• Synchronize roadmap and JCDS

FromCoastal Defence

toCoastal Development

but alwaysTowards a safe and resilient

Jakarta

Thank you!

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