'Great wall of Jakarta' plan to combat floods

Yahoo – AFP, Sam Reeves, 15 Oct 2014

Children residing in the slum area play along a dyke as construction of the

Jakarta sea wall begins, October 9, 2014 (AFP/Photo By Romeo Gaca)

Jakarta has launched a multi-billion-dollar scheme to build a huge sea wall to combat flooding as the Indonesian capital sinks, but there is scepticism about its chances of success in a country with a history of corruption and failed megaprojects.

The 35-kilometre (22-mile) wall, across the Bay of Jakarta off the city's northern coast, is the centrepiece of a project that will cost up to $40 billion over three decades, and also includes reclaiming land for 17 new islands.

The whole project will form the shape of a Garuda, the mythical bird that is Indonesia's national symbol.

Children residing in the slum area play 

along a dyke as construction of the 

Jakarta sea wall begins, October 9, 

2014 (AFP/Photo By Romeo Gaca)

While the aim is to prevent floods, it is hoped up to one million people will live and work on the islands, and help take pressure off a crowded city notorious as one of the world's most uninviting urban sprawls.

Supporters of the project, which officially got under way last week and is run by the Indonesian government with help from Dutch experts, say it is the only long-term solution.

"It's a life-and-death situation," said Purba Robert M. Sianipar, a senior economics ministry official with a key role in the project, adding hundreds were at risk of losing their lives from severe flooding if action was not taken.

However, some wonder whether such an ambitious plan will ever be completed, given Indonesia's bad record on infrastructure projects, such as plan to build a monorail in Jakarta that was embroiled in a storm of corruption six years ago.

Chief Economics Minister Chairul Tanjung suggested as much at last week's launch event, saying disagreements with future governments could knock the project off schedule.

Others question the approach entirely, saying the project will not stop the city from sinking, while graft is also a major danger, with officials sometimes awarding tenders to unsuitable firms in exchange for large kickbacks.

Jakarta has long been hit by floods during the rainy season, when tropical downpours cause rivers to burst their banks and deluge inadequate drainage systems, forcing tens of thousands out of their homes.

Residents gather along a dyke in Jakarta

as construction of the Indonesian capital's

 sea wall begins, October 9, 2014 (AFP/

Photo By Romeo Gaca)

However in 2007, a new type of flood set alarm bells ringing.

Rivers could stop flowing

Slum neighbourhoods were inundated when a high tide surged over sea defences in northern Jakarta, something that had never happened before and which highlighted the severe land subsidence in many areas.

As Jakarta has rapidly grown to a population of about 10 million, increased water extraction for drinking has caused the ground to compact and parts of the city to sink, a problem seen in other coastal conurbations, such as Ho Chi Minh City and Bangkok.

Parts of coastal north Jakarta, which is built on soft clay, are sinking as fast as 14 centimetres (5.5 inches) a year, meaning they could be metres below sea level in a few decades, according to those behind the sea wall project.

"Basically we are pumping ourselves into the ground," said Victor Coenen, from Dutch consultants Witteveen and Bos, which devised the master plan for the project.

The subsidence also means the 13 rivers in Jakarta may sink below sea level and stop flowing, increasing the risk of inundations.

After the 2007 floods -- which forced hundreds of thousands out of their homes -- officials scrambled to come up with a plan.

It involves strengthening the current, low sea defences over the next few years to provide temporary protection for north Jakarta, home to more than four million people.

A wall of giant iron reinforcement pipes is installed during the construction

of the Jakarta sea wall, October 9, 2014 (AFP/Photo By Romeo Gaca)

Work will then begin on the main wall, which will sit six to eight kilometres (four to five miles) from the coast and will be seven metres (23 feet) above sea level.

Construction of the wall will be finished between 2025 and 2030, while development on the islands -- which will have a mix of high-end and low-cost housing -- could take another decade.

A huge reservoir will be created between the islands and sea wall, where water from downpours can be stored so it does not flood the city, and into which rivers will be able to flow freely.

Plans are also in progress to slow the land subsidence by providing piped water to Jakarta from other areas and stop extraction of ground water.

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Action Needed Now to Avoid ‘Catastrophe’ in Jakarta

The Jakarta Globe, Emmy Fitri

Motorists stuck in traffic in Central Jakarta. (Photo: Jurnasyanto Sukarno., JG)

Inextricable traffic jams, even on toll roads, barely breathable air, heavily contaminated water and dwindling open spaces — problems suffered daily by Jakarta residents — may seem intolerable now, but experts warn that it will only become worse unless concerted efforts are made to fix the mess that is Indonesia’s capital.

Urban planning expert Darundono sums up the current path Jakarta is on today in one word — “catastrophic.”

Each day, almost 10 million commuters spend hours on Jakarta’s roads. But transportation analyst Budi Santosa, from Trisakti University, says it has long been predicted, in several studies, that by 2014, traffic jams in the capital are likely to reach total gridlock as a result of the exponential increase in the number of vehicles plying an insufficient road network.

“A viable solution is to design a mass rapid transportation system to reduce the vehicle population. We cannot afford to build another inner-city toll road or more streets because we have run out of land for such massive construction,” Budi said, adding that so far there appear to be no breakthroughs visible on the horizon.

Jakarta, however, is not only running out of land for more roads. The capital is choking from the unfettered conversion of open spaces into concrete.

Darundono says that when he designed the Jakarta Spatial Plan for 1965-1985, the designated green areas accounted for between 26 percent and 28 percent of the city’s surface, but today they make up only about 10 percent.

“The government has been inconsistent in its implementation of its own plans. Parks, green spaces and public cemeteries are being turned into shopping malls and government offices,” he says.

The combined effect of the sheer number of vehicles out on the road each day and the lack of green open spaces that could offset their fumes has severely degraded the quality of the city’s environment.

According to the Indonesian Forum for the Environment (Walhi), transportation causes 70 percent of Jakarta’s air pollution, and the city produces 13,000 tons of carbon dioxide daily.

As a result, on most days of the year — 347 out of 365 in 2006, to be exact — Jakartans are breathing in polluted air.

It is no wonder then, that a third of the capital’s residents suffer from some form of respiratory tract infection each month.

In fact, a World Resources Institute paper says respiratory tract infections account for 12.6 percent of mortality in Jakarta — more than twice the national average.

Admitting that the capital, home to as many as 12 million people, is mired in environmental problems, the acting head of the Jakarta Environment Management Board (BPLHD), Ridwan Panjaitan, says programs to address each and every issue are up and running, including the enforcement of emission tests and the smoking ban.

“But we cannot work by ourselves because some programs are closely related to other agencies like the health agency and the traffic police. That becomes our challenge, to synergize the programs with other agencies because unless we have a common understanding then we cannot work together,” he says.

Returning home at the end of the day, more than five million Jakartans will scarcely find rest and solace in their small, cramped houses in the capital’s rapidly expanding slum areas, where basic services such as water supply and sanitation are minimal, if they exist at all.

The government’s efforts to build thousands of low-cost apartments for the poor have so far been criticized as only adding to the problems, instead of being a solution.

“There will be massive groundwater use,” Darundono said.

Excessive groundwater extraction has long been flagged as a major problem in Jakarta, causing the land to sink by an average of 5 to 10 centimeters a year, according to a study by the World Bank.

The capital’s water supply operators have been unable to connect hundreds of thousands of households, particularly those in slum areas — where the thousands who migrate to Jakarta each year in search of work live.

With the confluence of these urban woes threatening the future of Indonesia’s capital, real solutions must be found soon.

On Nov. 10-12, international experts will converge on Jakarta to map out a sustainable path for the capital.

These solutions are urgently needed to avoid the catastrophe that Darundono says we are currently headed toward.

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Jakarta Predicted to be Underwater By 2012

Palyja launches program to net new customers

The Jakarta Post, Wed, 03/04/2009 4:05 PM   

JAKARTA: City water operator Palyja will start a new program in March to improve its services in the western part of Jakarta. 

The Census Project 2009, which will run until December, includes investigations, surveys and new connection installments. 

"Besides investigating illegal consumption and connections, we will also install 25,000 new connections," Palyja vice president director Herawati Prasetyo said in a statement sent to The Jakarta Post on Tuesday. 

At least 166 officials will be involved in the project. Last year, Palyja had 398,557 customers in the western part of Jakarta.

Jakarta Predicted to be Underwater By 2012

Monday, 02 March, 2009 | 16:23 WIB 

TEMPO Interactive, Jakarta: Firdaus Ali, a technical environment researcher from the University of Indonesia, predicts that Jakarta will be underwater before the year 2012. He cited as the cause the excessive suction of ground water in the Jakarta area, resulting in the continuing subsidence of the land surface. “Not only will the city go underwater, we will also suffer from dehydration prior to that,” said the doctorate from the University of Wisconsin contacted by Tempo yesterday. 

Firdaus’ calculation was based on the data of land subsidence in the capital city, which ranges around 10 centimeters a year in average. In West Jakarta, during the past 11 years, the land surface subsided by 1,2 meters. In Kemayoran and Thamrin in Central Jakarta, it has lost ground by 80 centimeters for the last 8 years. “If this continues, Jakarta’s land surface will be below sea level,” Firdaus said. 

City Environment Committee chief, Darrundono, shared a similar opinion, pointing out that extreme exploitation of ground water has caused a drastic land subsidence. He said ground water supply is not increasing, yet its consumption keeps going higher. “A ground water crisis in Jakarta has come to a dangerous stage,” he cautioned. 

The Jakarta administration plans to increase fees for ground water usage by luxury homes and industries to 6 – 16 times higher. This is aimed at reducing consumption which has become more exploitative. 

Increasing fees, Firdaus said, is one of the instruments to reduce its usage. Users would be persuaded to use potable water from the services of the state-run Water Supply Company (PAM). “Ground water tariffs should be higher than that of PAM,” he said. 

Every year, 320 million water cubic meters are sucked up from the ground, according to Firdaus. Yet, the reasonable amount should be only 38 million cubic meters. Meanwhile, the official data cites only 21 million cubic meters allowed to be consumed. “The remaining must be taken illegally,” he said. 

According to Firdaus, extreme ground water exploitation creates a hollow in the earth. The resulting pressure causes the land subsidence. There are already many hollow areas around. “Even local rainfall can flood many areas,” he said. 

Darrundono said the subsidence will cause Jakarta to slowly go below sea level. Sea water intrusion has currently reached 11 – 12 kilometers from the coast. “Sea water intrusion has reached the Setia Budi area in South Jakarta. Floods will become even more unmanageable,” he said. Sea water intrusion and subsidence can also cause buildings to collapse. 

Darrundono criticized the construction of super-block buildings and skyscrapers in Jakarta, which also takes up excessive amount of ground water. 

SOFIAN| LIS