The Marina Reservoir is a reservoir in Singapore formed in 2008 by building a dam across the mouth of the Marina Channel. With the completion of the Marina Barrage on 30 October 2008, the reservoir, which contained mainly salt water, became freshwater and started operations at 7 pm on 20 November 2010 after a process of natural desalination, when excess water was released out to the sea after heavy rains. The reservoir will provide 10% of the island's water needs. The catchment area that feeds the reservoir is about one-sixth the land size of Singapore, making it the largest of all the Singaporean reservoirs. Two of the island's most notable rivers - the Singapore River and Kallang River are part of the reservoir. The Geylang River and the Rochor River, both tributaries of the Kallang River form part of this reservoir as well. The reservoir was a competition venue for the 2010 Youth Olympic Games, where the canoeing and rowing events were carried out. From Wikipedia
