How many rivers are in Singapore?

- Singapore River: The Singapore River is the city-state's most important river. It flows from the Singapore Strait in the south to the Kallang Basin in the north. The river is about 11 kilometers (6.8 miles) long.

- Kallang River: The Kallang River is the second-longest river in Singapore. It flows from the Kallang Basin in the south to the Kallang Estuary in the east. The river is about 10 kilometers (6.2 miles) long.

- Sungei Serangoon: Sungei Serangoon is a river in the north-eastern part of Singapore. It flows from the Serangoon Reservoir in the north to the Serangoon Estuary in the south. The river is about 10 kilometers (6.2 miles) long.

- Sungei Seletar: Sungei Seletar is a river in the north-eastern part of Singapore. It flows from the Seletar Reservoir in the north to the Seletar Estuary in the south. The river is about 8 kilometers (5 miles) long.

- Rochor River: The Rochor River is a river in the Central Region of Singapore. It flows from the Stamford Canal in the north to the Marina Channel in the south. The river is about 1.6 kilometers (1 mile) long.

In addition to these major rivers, Singapore also has several smaller rivers and streams, such as the Geylang River, the Punggol River, and the Tampines River.