Steung Saen River

Steung Saen River
Stung Saen at Kampong Thom
Native name	ស្ទឹងសែន (Khmer)
Location
Country	Cambodia
Provinces	Preah Vihear Province and Kampong Thom Province
Physical characteristics
Mouth	Tonlé Sap River
• coordinates	12°31′59″N 104°26′15″E / 12.53312°N 104.43741°E / 12.53312; 104.43741
Length	520 km (320 mi)[1]
Basin size	16,344 km2 (1,634,400 ha)[1]
Basin features
Average runoff	11,685 m3 per second[2]

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Steung Saen River (ស្ទឹងសែន), sometimes spelt Steung Sen, is a river in Cambodia. It is a major tributary of the Tonlé Sap River.^[2] The Stung Sen River Basin is the largest among the 11 main tributaries around Tonlé Sap with a catchment surface of 16,344 km² (1,634,400 ha).^[1] The basin receives about 1,500 mm (59 in) of rain per year.^[2]

The river passes through Preah Vihear Province and Kampong Thom Province. The northern extent of the river basin corresponds to the border with Thailand as in 1904, Siam and the French colonial authorities ruling Cambodia formed a joint commission to demarcate their mutual border to largely follow the watershed line of the Dângrêk mountain range.