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The Central Water Catchment, also known as the Central Catchment Area, is a designated planning area and one of the two main water catchments of Singapore. The country's main reservoirs – MacRitchie , Upper Seletar , Upper Peirce and Lower Peirce – are in the central catchment area.
The Western Water Catchment is a planning area located in the West Region of Singapore. The planning area borders Tuas and Pioneer to its south, Sungei Kadut , Choa Chu Kang and Tengah to its east, Jurong West to its southeast, Lim Chu Kang to its north and the Straits of Johor to its west.
Demand for fresh water is approximately twice that supplied by rainfall, so Singapore imports much of its fresh water from Malaysia and Indonesia. To lessen its reliance on imports, Singapore has built reservoirs to collect rainwater from both forest catchment and urban catchment run-offs and from recycled water facilities.
The following is a list of reservoirs in Singapore. There are a currently 17 reservoirs which are designated as national water catchment areas and are managed by the Public Utilities Board (PUB) of Singapore. [1] [2]
Map of Singapore showing in the Northeast the mouth of the Johor River, Singapore's main source of mud, and streams in the Central Catchment Area in the middle of Singapore. After the war, Singapore continued to grow rapidly and more water was needed to sustain the city’s growth.
The reservoir has a catchment size of nearly one-sixth of mainland Singapore's land area. [1] The Kallang Basin is a popular location for water sports, in particular, kayaking and dragon boating. Today, the area surrounding the body of water is also frequently called "Kallang Basin".
With the completion of the Marina Barrage in 2008, the entire region comprising the basins of the Singapore River, Rochor River, Geylang River and Kallang River has transformed into a water catchment area. In April 2006, the Singapore government announced plans to give a 200-metre stretch of the Kallang River at Kolam Ayer a S$2.5 million facelift.
The regions are further subdivided into 55 planning areas, which include two water-catchment areas. The largest region in terms of area is the West Region with 218.4 km 2 (84.3 sq mi), while the Central Region is the most populous with an estimated population of 922,980 inhabitants in the area in 2019. [3]