Flooding in Jakarta
- See also Jakarta#Geography
The area of the Jakarta Special District is 662 km2 of land area and 6,977 km2 of sea area.
Jakarta lies in a low, flat basin, averaging 7 metres (23 ft) above sea level; 40% of Jakarta, particularly the northern areas, is below sea level, while the southern parts are comparatively hilly.
Rivers flow from the Puncak highlands to the south of the city, across the city northwards towards the Java Sea; the Ciliwung River, divides the city into the western and eastern principalities. Other rivers include the Pesanggrahan, and Sunter high sea tides.
Other contributing factors include clogged sewage pipes and waterways that service an increasing population, in addition to deforestation near rapidly urbanizing Bogor and Depok in Jakarta's hinterland.
Jakarta is an urban area with complex socio-economic problems that indirectly contribute to triggering a flood event.
In February 1960, flooding occurred in the new suburb of Grogol. Despite the flood-proof planning of Grogol suburb, the area was flooded to knee and waist height. This was the first crisis for Governor Soemarno who was installed only days before the floods began.
- See also 2007 Jakarta flood
Major floods also occurred in 2007. Losses from infrastructure damage and state revenue were at least 5.2 trillion rupiah (572 million US dollars) and at least 190,000 people have fallen ill due flood related illnesses. Approximately 70% of Jakarta's total area was flooded with water up to four meters deep in parts of the city. 80 people were killed in the floods.
This section needs expansion. You can help by adding to it. (October 2013)
In May 2011, the Jakarta Environmental Management Agency categorized all rivers in Jakarta as polluted; 71% of them were heavily polluted, 20% were partly polluted and 9% were lightly polluted.
East Flood Canal (Banjir Kanal Timur, BKT) in eastern Jakarta was a national project which began in 2003 and late 2009 reached the Java sea and will be accomplished in 2011. It was 23.5 kilometers length which linking five rivers: Cipinang, Sunter, Buaran, Jati Kramat and Cakung. It will reduce flood and hope as a 2 kilometers rowing sport venue too. To ease from flood, Jakarta Emergency Dredging Innitiave (JEDI) phase-2 will make underground canal (siphon) from Ciliwung river to Cipinang river and then go through to East Flood Canal. It will lower floods at Cawang, Kampung Melayu, Bukit Duri and Kebun Baru. The length is one kilometer and is finished in 2016.
Using participatory mapping for disaster preparedness in Jakarta
For managing risk effectively, it needs extensive data for making decisions on investments in preparedness, mitigation, and response. The detailed information on disaster situation (flooding) is hardly available at local level. OpenStreetMap is the online, open-source platform, which relies on participatory mapping conducted by local communities, private and public actors who collect the detailed information about a given area and share it, meet the needs in disaster situation. The pilot project in Jakarta was led by the Province of Jakarta's Disaster Management Agency collected high-resolution data to inform flood preparedness and contingency. Later, the data, which is accessible by the community and the general public, was used in 2011/2012 Jakarta contingency emergency planning exercise. The risk information it produces is very useful for decision makers in preparedness, development and investment planning.
Besides flood from the rivers, Jakarta is also sinking about 5 to 10 centimeters each year and up to 20 centimeters in northern Jakarta mainland. From 2000 to 2050 the potential coastal flood extent is estimated to increase by 110.5 km2 due to both land subsidence and sea-level rise. To solve it, the Netherlands will give $4 million for a feasibility study to build a dike on Jakarta Bay. The ring dike will be provided with pumping system and retention area, would regulate and control seawater and use also as additional toll road. The project will be built by 2025.
Construction of an 8 km sea wall along the coast was officially launched on Oct. 9, 2014.
- Based on Governor Decree in 2007, No. 171. taken from Statistics DKI Jakarta Provincial Office, Jakarta in Figures, 2008, BPS, Province of DKI Jakarta
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- Jakarta Flood Feb 2007 « (Geo) Information for All
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- (PDF) https://www.gfdrr.org/sites/gfdrr/files/publication/Pillar_1_Using_Participatory_Mapping_for_Disaster_Preparedness_in_Jakarta_OSM.pdf. Missing or empty
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- Kusuma, Adriana Nina (9 October 2014). "Indonesia Holds Groundbreaking Ceremony for Giant Sea Wall". The Jakarta Globe. Retrieved 10 October 2014.