Kranji Reservoir is a reservoir in the northern part of Singapore

Singapore

Singapore , officially the Republic of Singapore, is a Southeast Asian city-state off the southern tip of the Malay Peninsula, north of the equator. An island country made up of 63 islands, it is separated from Malaysia by the Straits of Johor to its north and from Indonesia's Riau Islands by the...

, near the Straits of Johor

Straits of Johor

The Straits of Johor is a strait that separates the Malaysian state of Johor to the north from Singapore to the south....

 was a former freshwater river

River

A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...

 that flowed out into the sea that dammed at its mouth to form a freshwater reservoir. It can also be classified as an estuary

Estuary

An estuary is a partly enclosed coastal body of water with one or more rivers or streams flowing into it, and with a free connection to the open sea....

. The dam has a road bridging the two banks, and now prevents the sea

Sea

A sea generally refers to a large body of salt water, but the term is used in other contexts as well. Most commonly, it means a large expanse of saline water connected with an ocean, and is commonly used as a synonym for ocean...

 from coming in, and is home to a marsh

Marsh

In geography, a marsh, or morass, is a type of wetland that is subject to frequent or continuous flood. Typically the water is shallow and features grasses, rushes, reeds, typhas, sedges, other herbaceous plants, and moss....

.

The former Kranji River has three main tributaries - Sungei Peng Siang, Sungei Kangkar and Sungei Tengah.

Incidents

• In 2002, a mother and son were picking shells from the shores of Kranji Reservoir when the PUB opened up the barrage to let water into the reservoir from the sea. Both of them died. PUB later clarified that a sound was made before the barrage was opened to warn people not to get too near the reservoir.