Water management in Dhaka, the capital of Bangladesh and a city with 12 million inhabitants, faces numerous challenges such as flooding, poor service quality, groundwater depletion, inadequate sanitation, polluted river water, unplanned urban development, and the existence of large slums where more than one third of its population lives. Residents of Dhaka enjoy one of the lowest water tariffs in the world, which limits the utility's capacity to invest. The utility in charge of water and sanitation in Dhaka, DWASA, addresses these challenges with a number of measures. It says that in 2011 it achieved a continuous water supply 24 hours per day 7 days a week, an increase in revenues so that operating costs are more than covered, and a reduction of water losses from 53% in 2003 to 29% in 2010.[1] For these achievements DWASA, got a "Performer of the Year Award" at the Global Water Summit 2011 in Berlin.[2] In the future DWASA plans massive investment to replace dwindling groundwater resources with treated surface water from less polluted rivers located up to 160km from the city.[1] In 2011 Bangladesh’s capital development authority, Rajdhani Unnayan Kartripakkha, made rainwater harvesting for new houses mandatory in an effort to address water scarcity and reduce flooding.[3]
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Water scarcity will be a major issue in the near future, not just for Bangladesh but the entire planet. The International Water Management Institute (IWMI) recently concluded that almost twice as much water as consumed presently will be required to support the world’s population, with added variability in climate change. Most speculate that the planet will be bombarded with regional droughts in some areas, and with unlivable flooding in others. Both of which are equally disastrous. The problem is not constrained to agricultural water. The availability of clean water is rapidly diminishing with increasing global and national population.
Around 80 per cent of the ocean population is too polluted to drink due to land based activities, while a great portion of lakes and water bodies are too polluted to allow fishing, swimming or support aquatic life. Global warming and subsequent melting of icecaps have raised the seal-level which coupled with deforestations to make room for the growing world population has cased various organism ecosystems and biodiversity to be lost each day.
In a low income country such as Bangladesh, water and sanitation are major issues. The poor majority lack access to clean water and safe sanitation while others use fresh water to flood urban toilets which adds raw sewage typically dumped directly into the rivers. Bangladesh is famous for its flooding, and although in principle it affects the entire nation, it is the rural poor again who lose their limited property and even their lives. In the urban side, due to the rise in population, the cities are growing at alarming rates, meaning more and more structures are being built, resulting in deforestations and a lack of greeneries that had the ability to sequester plentiful and harmful carbon from the earth’s atmosphere. Moreover, these buildings which are at times unsafe, unhealthy and unplanned are built on land grabbed illegally. Surface water sources which would have provided water to the decreasing supply from [www.dwasa.org.bd Dhaka Water and Sewage Authority]] (DWASA) is in itself disappearing due to construction. Furthermore, these constructed structures are not energy and water efficient, and give off high amounts of carbon. With mismanaged wastes and unchecked air quality, the national building sector, although robust and popular, is in itself well on its way to create irreversible national problems.[4]
The first piped drinking water system in Dhaka was established in 1874 by Khwaja Abdul Ghani, the aristocrat that ruled Dhaka under the British colonial authorities. The system was fed by a water treatment plant in Chadnighat near the bank of the river Buriganga. After independence from the British in 1948 the Department of Public Health Engineering of the Pakistani government was in charge of drinking water supply as well as sanitary sewers and stormwater drainage. Dhaka WASA (Water Supply & Sewerage Authority) was established in 1963. In 1989, the stormwater drainage system of Dhaka city was handed over to DWASA. In 1990, the service area was extended to include Narayanganj city. In the early 1990s the World Bank had said it would only provide a loan for water supply in Dhaka if the utility would enter into a public-private partnership with an international water company. When this was rejected, it asked that revenue billing and collection should be outsourced to a private company for at least one service area on a pilot basis, and that DWASA should be transforemd into a commercially oriented utility.[5] The outsourcing in one service area was done in 1997, but the pilot project was not deemed successful and was stopped. DWASA's activities have been reorganized by the Dhaka WASA Act, 1996 that transformed DWASA into a service oriented commercial organization.[6]
The service area of DWASA covers more than 360 square km with a population of about 12 million. It extends from Mirpur and Uttara in the North to Narayanganj in the South. Buriganga river and many canals flow through the city.[7] Tropical vegetation and moist soils characterize the land, which is flat. The elevation of Greater Dhaka is 2 to 13 meters above the mean sea level, and most of the urbanized areas are at elevation of 6 to 8 meters. This leaves Dhaka susceptible to flooding during the monsoon seasons owing to heavy rainfall and cyclones.[8]
Water management in Dhaka faces numerous challenges such as flooding, poor service quality, groundwater depletion, inadequate sanitation, polluted river water, unplanned urban development, and the existence of large slums where more than one third of its population lives. Every year during the dry season, people demonstrate in Dhaka’s streets demanding an uninterrupted supply of clean water. In 2010, Bangladesh’s government had to even deploy troops to guard water pumps following angry protests.[3]
As of 2011, the present demand in Dhaka is around 2500 MCM (million cubic meters) while the supplied quantity is well under 2000 MCM. In a few decades the demand is forecasted to rise to around 5000 while the supply will be almost still the same, perhaps crossing 2000 MCM. A few decades ago, the majority of Dhaka’s surface was covered with water bodies. Recent boom in the urban population has left these water bodies to be filled up to make way for construction. The remaining water has been polluted due to land based human activities. The city is currently depended primarily on ground water. More dangerously, the ground water table is declining, meaning that eventually a void will form in the aquifer which may cause a sudden collapse on the surface. Recent earthquake trends is also worrisome as Dhaka, with its unplanned buildings with cramped population would suffer monumental losses. The hazardous attribute of the city planning also slows down the ground recharge as the area is greatly lacking open spaces. The most direct method is to conserve the use of water and taking a serious stance against land grabbing of water bodies and manage the current surface water treatment plants more effectively.[9]
Bangladesh has been repeatedly exposed to severe flooding. Dhaka was particularly hit by the floods of 1970, 1974, 1980, 1987, 1988, 1996, 1998, 2004, 2007 and 2009, some of which such as the ones in 1988 and 1998 were catastrophic with flood levels of up to 4.5m in parts of the city. During the 1998 flood about 56 percent of the city was inundated, including most of the eastern and 23 percent of the western parts of the city.[8] During non-catastrophic floods some streets are inundated for up to 60cm for several days. Flooding in Dhaka is caused by high rainfall in the city and/or by flooding from the surrounding rivers and canals. The western and most densely settled part of Dhaka is protected from river flooding by raised roads and an encircling embankment built after the 1988 flood. The eastern part of the city where most of the expansion takes place consists of low-lying floodplains that are submerged during the monsoon season.[8] When high rainfall coincides with a high water level in the river, stormwater cannot be naturally evacuated through the drainage system.[10] Retention areas are supposed to mitigate flooding and pumping stations have been set up to evacuate floodwater. However, encroachment of natural runoff detention areas, lack of maintenance of storm sewers and pumps, and a lack of coordination among responsible organizations hamper efforts at flood management.[11] Four organizations are in charge of various aspects of stormwater management in Dhaka: The Bangladesh Water Development Board (BWDB) is in charge of operating regulators and gates in the embankment; DWASA is in charge of the larger open drainage canals and pipes; Dkaha City Corporation (DCC) operates smaller underground and surface drains; and the Capital Development Authority (RAJUK) constructs underground roadside drainage lines during the construction of new roads. Stormwater pumping stations of various sizes are operated by BWDB, DWASA and the Dkaha City Corporation. After the catastrohic 1998 flood caused by high river levels, it turned out that there was neither an operating policy nor person assigned to operate an important regulator, the Rampura Regulator. Many gates that were supposed to be closed to keep the water from the rising rivers out had not been closed.[8] Furthermore, in 2002 it was noted that the existing earthen embankment was unstable and cracking in large sections. Also, construction of embankments through low-lying areas without providing adequate drainage facilities had caused internal flooding.
According to background information for a representative survey conducted for the Asian Development Bank in 2005, out of the 12 million inhabitants of Dhaka, the Dhaka water utility provided drinking water for 9 million through house connections, as well as for an additional 600,000 through 1700 standpipes and 100,000 through bulk connections. Bulk connections are located in slums and are known as “Water Points“. NGOs are responsible for the installation, operation, maintenance as well as collection of revenues from these connections.[12] Only 39% of the residential customers surveyed reported having a continuous water supply. On average, customers received water 15 hours per day. 75% of residential and 85% of non-residential customers reported that they had water storage facilities at their premises. 62% of residential customers reported their water quality as good or fair, i.e. not smelly or dirty. Only 10% of residential customers reported drinking water directly from the tap. By far the most common treatment method was boiling. 75% of the domestic and 64% of the non-domestic households were willing to pay more for better services.[13]
The authors of the survey note a number of discrepancies between utility data and the results of the survey. The utility indicated at the time that 70% of its customers had continuous supply, that 63% had meters and that 97% of meters were in working condition. However, the survey indicated that 42% had continuous supply, that 76% were metered and that only 77% of meters were in working condition.[14]
82% of the city's water supply is abstracted from groundwater through 577 deep tube wells, while four relatively small surface water treatment plants provide the remaining 18%.[15] Groundwater levels are dropping at two to three metres every year. The city’s water table has sunk by 50 metres in the past four decades and the closest underground water is now over 60 meters below ground level.[16] [3] The Asian Development Bank estimated in 2007 that by 2015 a severe supply shortage would occur if the utility did not reduce groundwater abstraction.[17]
In Dhaka, nearly one third of domestic effluents does not receive any kind of treatment. About 38% of the population is covered by a sewerage system.[1] There is one wastewater treatment plant with a capacity of 120,000 m³ per day. About 30% of the population uses conventional septic tanks and another 15% uses bucket and pit latrines. During the rainy season, sewage overflows are common.[18]
Residents of Dhaka enjoy one of the lowest water tariffs in the world. The Executive Head of DWASA lists provision of water at low cost as one of the achievements of the utility. However, low revenues limit the utility's capacity to make a higher contribution to investments.[1]
According to DWASA's official website, in November 2011 the metered residential tariff was 6.6 Taka (US$0.09) per cubic meter. For households with sewer connections the tariff was 15.5 Taka (US$0.21) per cubic meter. Unmetered residential water connections were billed 128 Takas (US$1.72) per month. The commercial, industrial and institutional tariffs are more than three times higher.[19] Total revenues were the equivalent of about US$70 million per annum in 2010 and, according to DWASA management, cover about 25% more than the operating costs of the utility (operating ratio of 0.79).[1]
A common indicator of whether water utilities are overstaffed is the ratio of employees per 1,000 connections. Using this indicator, DWASA appears to be overstaffed: According to the DWASA website, the utility had 3,717 employees and served 248,346 connections in November 2007, resulting in 15 employees per 1,000 connections.[20][21] This figure is almost twice as much as the average of 18 major Asian cities, which was 8.3 in 2001 according to the Asian Development Bank.[22] However, in Dhaka there are more than 40 inhabitants per connection, an unusually high ratio. Thus, for a city of 12 million the utility is not necessarily overstaffed.[15] For example, the city of Berlin, Germany, also had 3,948 employees in 2009, but served less than 4 million people.[23] Given low salaries in Bangladesh, it is also appropriate to use more labor-intensive approaches than in richer countries, and the staffing level should thus probably not be considered to be overly high.
In 2010 the Dhaka water utility, DWASA, embarked on a "Turnaround Plan" for the period 2010-12. The Turnaround Plan includes capacity building, more transparency and accountability, and better customer orientation. According to the Executive Head of DWASA, as of early 2011 achievements are a continuous water supply 24 hours per day 7 days a week, an increase in revenues so that operating costs are more than covered, and a reduction of water losses.[1] For these achievements DWASA, got a "Performer of the Year Award" at the Global Water Summit 2011 in Berlin, an event organized by an industry magazine. The award selection was made by participants based on presentations by the managers of seven invited utilities from Algeria, Bangladesh, Brazil, Poland, Romania and the United States.[2]
In Dhaka, the share of non-revenue water (NRW), water which is not billed, e.g., due to leakage and illegal connections, has been reduced substantially. According to the DWASA website, system losses have been reduced from 54% in 2002-2003 to 34% in 2005-2006 and 35% in 2006-2007.[24] As of 2010, the figure was further reduced to 29%. The utility plans to reduce NRW to 25% in 2012. It received funding from the Asian Development Bank to replace distribution pipes.[1] The average level of NRW in 17 other major Asian cities, as estimated by the ADB in 2004, was 34%.[22]
DWASA introduced a computerised billing system including the ability of customers to pay bills via SMS. Through this system and other measures revenues increased by 20% in a year and a half from 2009 on,[1] while tariffs went up by only about 5% in July 2010.[25]
DWASA has eleven revenue zones. It sets a zone-wide annual target for billing, collection and reduction of non-revenue water. In at least three revenue zones utility staff are in charge of billing and collection directly, while in the other revenue zones this is done by an employees’ cooperative, the Employees’ Consumers Supplies Cooperative Society Ltd. (ECSCSL), under contract with the utility. Most of the workers at ECSCSL are seconded from Dhaka WASA. They receive salaries that are up to three times higher than at Dhaka WASA. Non-performing employees can be sent back to Dhaka WASA and ECSCSL can recruit new employees on its own. Workers also undertake water connections in informal houses, which Dhaka WASA rules do not normally permit.
The system was introduced in 1997 in the context of privatization efforts (see history section) which were opposed by employees. It was thus decided that one zone would be privatized and another one would be given to the employees’ cooperative, experimentally, for one year. The private company and ECSCSL started in September 1997. In 1998 a monitoring committee found that ECSCSL had out-performed the private company in revenue collection increases and non-revenue water reductions. Subsequently, Dhaka WASA asked ECSCSL to take over two more of its revenue zones. The cooperative made sure that consumers receive bills monthly rather than bimonthly. The Cooperative has met its contractual targets every year. However, an independent study conducted in 2004 found that Dhaka WASA tends to choose deliberately low financial targets in the Cooperative zones. Moreover, the cost of revenue collection in the cooperative zones has almost doubled.[5]
A project provided water to hitherto unserved slum areas through community-based organizations with the assistance of the NGO Dushtha Shasthya Kendra (DSK) and WaterAid from the UK.[26][27] A pilot project for a small-bore sewer system in the Mirpur area of Dhaka is being carried out with financing from the Asian Development Bank.
The utility plans to substitute surface water for groundwater through the construction of four large water treatment plants until 2020 at a cost of US$1.8bn (Saidabad Phase II and III, Padma/Pagla and Khilkhet). The treatment plants will draw water from more distant and less polluted rivers up to 160km from the city. The four plants are expected to have a combined capacity of 1.63 million cubic meters per year, compared to a 2010 supply of 2.11 million cubic meter per year that is mainly from groundwater. As of 2011, funding had been secured for the first plant which is under construction thanks to a US$250 million contribution from Danish development assistance.[1]
To alleviate the water scarcity, in 2011 the city of Dhaka announced it would amend its building code to require rooftop rainwater harvesting systems in new buildings. The measure aims to address the city’s worsening water shortages and curb drops in groundwater levels. Collecting rainwater also will help avoid flooding problems in Dhaka during the monsoon season.[3]
The Ministry is under the authority of the in the Ministry of Local Government, Rural Development and Cooperatives. DWASA's Board consists of 13 members and is chaired by a customer representative. The Ministry is represented by a Joint Secretary from the Local Government Division. Two board members are appointed by the municipal authority and one by the Minister of Finance. The Executive Head of DWSASA is also an ex officio member of the Board. Other members are appointed by professional associations and the Chamber of Commerce and Industry.[28]
Water supply and sanitation in Bangladesh