The geographically small island nation of Singapore has few rivers of significant length or width. The longest of these, the Kallang River , is only 10 km (6.2 mi) in length. The Singapore River , perhaps the most famous in the country, is of a short length as well. However, the country's tropical climate and heavy rainfall require a very comprehensive network of natural draining systems, much of which has become a concrete system as urbanisation spread across the island.
River Drainage area(s) River mouth Location Alexandra Canal Bukit Merah , Tanglin No river mouth. "Alexandra Canal" is the name given to the upstream of the Singapore River . Geylang Canal Geylang No river mouth. "Geylang Canal" is the name given to the upstream of the Geylang River . Geylang River Geylang , Kallang Kallang Basin Kallang River Bishan , Central Water Catchment , Kallang , Toa Payoh Kallang Basin Pelton Canal Geylang , Kallang Kallang River Rochor Canal Kallang , Rochor No river mouth. "Rochor Canal" is the name given to the upstream of the Rochor River . Rochor River Kallang Kallang Basin Siglap Canal Bedok , Marine Parade Singapore Straits Singapore River Downtown Core , Singapore River Planning Area Marina Bay Stamford Canal (formerly Sungei Brass Bassa) Central Area (largely underground) Sungei Apek Western Water Catchment Kranji Reservoir 1°24′26″N 103°43′21″E / 1.407249°N 103.722590°E / 1.407249; 103.722590 Sungei Api Api Pasir Ris , Paya Lebar , Tampines Serangoon Harbour Sungei Bedok Bedok , Tampines Singapore Straits Sungei Buloh Besar Lim Chu Kang Straits of Johor Sungei Cina Woodlands Straits of Johor Sungei Choa Chu Kang Western Water Catchment Poyan Reservoir Sungei Jurong Jurong East Selat Jurong Sungei Kangkar Lim Chu Kang , Western Water Catchment Kranji Reservoir Sungei Ketapang Tampines Sungei Bedok Sungei Khatib Bongsu Simpang , Yishun Straits of Johor Sungei Lanchar Boon Lay , Jurong West Selat Jurong Sungei Mandai Sungei Kadut Straits of Johor Sungei Pandan Bukit Batok , Clementi , Jurong East Selat Jurong Sungei Peng Siang Choa Chu Kang , Tengah , Western Water Catchment Kranji Reservoir Sungei Pinang (Yishun) Yishun Lower Seletar Reservoir 1°24′52″N 103°51′32″E / 1.41455°N 103.85887°E / 1.41455; 103.85887 Sungei Pinang (Hougang) Hougang Sungei Serangoon 1°24′51″N 103°51′35″E / 1.414217°N 103.859642°E / 1.414217; 103.859642 Sungei Punggol Hougang , Punggol , Seletar , Sengkang , Serangoon Straits of Johor Sungei Seletar Yishun Lower Seletar Reservoir Sungei Seletar Simpang Kiri Ang Mo Kio , Yishun Lower Seletar Reservoir Sungei Sembawang Sembawang Straits of Johor Sungei Serangoon Hougang , Pasir Ris , Punggol , Sengkang Serangoon Harbour Sungei Simpang Simpang Straits of Johor Sungei Simpang Mak Wai Lim Chu Kang , Western Water Catchment Kranji Reservoir 1°24′44″N 103°42′29″E / 1.412274°N 103.708011°E / 1.412274; 103.708011 Sungei Tampines Pasir Ris , Tampines Serangoon Harbour Sungei Tengah Western Water Catchment Kranji Reservoir Sungei Tho Pek Kong Western Water Catchment Poyan Reservoir 1°22′46″N 103°40′56″E / 1.379549°N 103.682153°E / 1.379549; 103.682153 Sungei Ulu Pandan Bukit Timah , Clementi , Queenstown Sungei Pandan Sungei Whampoa Kallang , Novena Kallang River
On offshore islands [ edit ] Sungei Belang Sungei Chek Mat Nah Sungei Pasir Sungei Permatang Sungei Sanyongkong Sungei Seminei Sungei Unum Sungei Asam Sungei Batu Kekek Sungei Besar Sungei Jelutong Sungei Mamam Sungei Puaka Sungei Pulau Ubin Sungei Teris Sungei Tiga Sungei Wat Siam
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