Water resources of Singapore
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The water resources of Singapore are especially precious given the small amount of land and territory in Singapore's geography while having a large urban population in the city-state.
Without natural freshwater rivers and lakes, the primary domestic source of water in Singapore is rainfall, collected in reservoirs or water catchment areas. Rainfall supplies approximately 50% of Singapore's water; the remainder is mainly imported from Malaysia. Presently, more catchment areas, facilities to recycle water (producing NEWater) or desalination plants are being built. This "four tap" strategy aims to reduce reliance on foreign supply and to diversify its water sources.
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[edit] Supply provided by water catchment areas
Singapore's first reservoir is MacRitchie reservoir, which was built by the British in 1867. Subsequently, as Singapore developed into a modern city over the years, more sources of water were needed to sustain the city’s growth. Thus two local reservoirs were added to the rapidly modernising colonial city.
After independence, the Public Utilities Board took over the control of basic supplies including water. From then on, there have been many developments and improvements to increase the water supply for Singapore.
The 1960s and 1970s saw great development for Singapore. In order to maintain that, many big water projects were embarked upon to increase the water supply. Examples of these projects included the Kranji-Pandan Scheme, the Upper Pierce Project and the Western Catchment Water Scheme.
Modern Singapore sources her water from a network of reservoirs and water catchment areas. By 2001, there were 19 raw water reservoirs, 9 treatment works and 14 storage or service reservoirs locally to serve domestic needs.
A dam is also being constructed around the estuary of three Singapore rivers, creating a huge freshwater reservoir, the Marina Bay reservoir, by 2009. When developed, this will increase the rainfall catchment to two-thirds of the country's surface area.
[edit] Imported water supply
For decades, Singapore has relied on import from Malaysia to supply half of the water consumption in Singapore. However
[edit] Water recycle
NEWater is the brand name given to reclaimed water produced by Singapore's public utilities. More specifically, it is treated wastewater (sewage) that has been purified using dual-membrane (via microfiltration and reverse osmosis) and ultraviolet technologies, in addition to conventional water treatment processes.
There are three NEWater factories, located at the Bedok, Kranji Water Reclamation Plants, and Seletar Water Reclamation Plant, producing about 20 million US gallons per day (0.9 m³/s). About 6% of this is used for indirect potable use, which contributes 1 % of Singapore's potable water requirements of 300 million US gallons per day (13 m³/s). The rest of the water is used at wafer fabrication plants and other non-potable applications in industries.
The fourth recycling plant, with a capacity of 32 million gallons per day opened in Ulu Pandan on 15 March 2007. With this new capacity coming on stream, NEWater can now meet 15 % of Singapore's water needs.[1]
[edit] Desalination
On 13 September 2005, the country opened its first desalination plant by SingSpring, a fully-owned subsidiary of Hyflux. The plant, located at Tuas, produces 30 million gallons of water (136,380 m³) each day. Worth S$200 million, it is one of the biggest in the world and meets 10 percent of the country's water needs. [2] The plant also produces bottled water called the Desal H2O.
At the desalination plant, sea water is forced through plastic membranes with microscopic pores to extract dissolved salts. Silt is removed by dousing the seawater with chemicals that coagulate the particles.
Coinciding with the official opening of the desalination plant, the International Desalination Association (IDA) held its 6-day World Congress in Singapore. About six hundred experts and delegates attended the congress to discuss about desalination and water reuse.[3] Several experts suggested that Singapore could become the world's water hub for water recycling and desalination technology and could export this technology to the world including China.[4] Dr Masaru Kurihara, director of IDA, said that with the new technology in water reclamation, waste water would become the most important sustainable water resource in the future.
[edit] Conservation
There has also been campaigns to urge people to conserve water, aiming to reduce consumption 161 litres per day per person to 155 litres and suggested methods include spending one minute less in the shower.[citation needed]Using the sorces of MEWR.
[edit] See also
[edit] References
- ^ Public Utilities Board (15 Mar 07). "Singapore's fourth NEWater plant opens". Press release.
- ^ Dominique Loh. "PM Lee opens Asia's largest water desalination plant in Tuas", Channel NewsAsia.
- ^ Johnson Choo. "Singapore hosts international forum on desalination technology", Channel NewsAsia.
- ^ Dominique Loh. "Water experts say Singapore can become world's water hub", Channel NewsAsia.
[edit] Further reading
- Singapore opens first desalination plant in Tuas - Channel NewsAsia (13 September, 2005)
- Singapore to open first desalination plant in bid for water self-sufficiency - Canadian Press (13 September, 2005)
- Water trade and Pedra Branca
- BBC News: Malaysia raises water stakes
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