The Pa Sak River ( th, แม่น้ำป่าสัก, ,
Pronunciation
is a river in central

Thailand Thailand ( ), historically known as Siam () and officially the Kingdom of Thailand, is a country in Southeast Asia, located at the centre of the Indochinese Peninsula, spanning , with a population of almost 70 million. The country is b ...

. The river originates in the Phetchabun Mountains, Dan Sai District, Loei Province, and passes through

Phetchabun Province Phetchabun ( th, เพชรบูรณ์, ) is one of Thailand's seventy-six provinces (''changwat'') lies in lower northern Thailand. Neighbouring provinces are (from north clockwise) Loei, Khon Kaen, Chaiyaphum, Lopburi, Nakhon Sawan, Phi ...

as the backbone of the province. It then passes through the eastern part of Lopburi Province and Saraburi Province, until it joins the Lopburi River northeast of Ayutthaya Island, before it runs into the

Chao Phraya River The Chao Phraya ( or ; th, แม่น้ำเจ้าพระยา, , or ) is the major river in Thailand, with its low alluvial plain forming the centre of the country. It flows through Bangkok and then into the Gulf of Thailand. ...

southeast of Ayutthaya near Phet Fortress. It has a length of and drains a watershed of . The annual discharge is . The valley of the Pa Sak through the Phetchabun mountains is a dominant feature of Phetchabun Province. Water levels vary seasonally. To address drought problems in the lower Pa Sak valley, in 1994 the construction of the Pa Sak Cholasit Dam (เขื่อนป่าสักชลสิทธิ์) in Lopburi Province was built. The wide and high dam retains of water. The dam also supplies about 6.7 MW of electricity.

Tributaries

Tributaries of the Pa Sak include the Lopburi River, Khlong Muak Lek, Huai Nam Phung,

Huai Pa Daeng Huai Pa Daeng ( th, ห้วยป่าแดง, ) is a watercourse of Thailand. It is a tributary of the Pa Sak River, part of the Chao Phraya River The Chao Phraya ( or ; th, แม่น้ำเจ้าพระยา, , or ) is t ...

, Khlong Lam Kong,

Lam Sonthi Lam Sonthi (, ) is a tributary of the Pa Sak River. It originates at the Ruak and Phanghoei mountains in the border area of Lam Sonthi district, Lopburi province and Si Thep, Phetchabun province Phetchabun ( th, เพชรบูรณ์, ) ...

, Khlong Wang Chomphu,

Khlong Huai Na Khlong Huai Na ( th, คลองห้วยนา, ) is a watercourse of Thailand. It is a tributary of the Pa Sak River, part of the Chao Phraya River The Chao Phraya ( or ; th, แม่น้ำเจ้าพระยา, , or ) is ...

Huai Nam Chun Huai Nam Chun ( th, ห้วยน้ำชุน, ) is a watercourse in Phechaboon Province, Thailand. It is a tributary of the Pasak River, part of the Chao praya River basin. Chun {{Thailand-river-stub ...

Huai Nam Duk Huai Nam Duk ( th, ห้วยน้ำดุก, ) is a watercourse in Phetchabun Province, Thailand. It is a tributary of the Pa Sak River, part of the Chao Phraya River The Chao Phraya ( or ; th, แม่น้ำเจ้าพระ� ...

Huai Khon Kaen Huai Khon Kaen ( th, ห้วยขอนแก่น, ) is a watercourse in Phetchabun Province, Thailand. It is a tributary of the Pa Sak River, part of the Chao Phraya River basin. Khon Kaen Khon Kaen ( th, ขอนแก่น, ) is one ...

, Huai Yai,

Khlong Saduang Yai Khlong Saduang Yai ( th, คลองสะดวงใหญ่, ) is a watercourse of Thailand. It is a tributary of the Pa Sak River, part of the Chao Phraya River The Chao Phraya ( or ; th, แม่น้ำเจ้าพระยา ...

Khlong Ban Bong Khlong Ban Bong ( th, คลองบ้านบง, ) is a watercourse of Thailand. It is a tributary of the Pa Sak River, part of the Chao Phraya River The Chao Phraya ( or ; th, แม่น้ำเจ้าพระยา, , or ) is ...

, Khlong Tarang, and

Lam Phaya Klang Lam Phaya Klang ( th, ลำพญากลาง, ) is a river of Thailand. It is a tributary of the Pa Sak River, part of the Chao Phraya River basin. Rivers of Thailand, Phaya Klang {{Thailand-river-stub ...

Pa Sak Basin

The Pa Sak drains an area of . The Pa Sak Basin is part of the Chao Phraya watershed.

References

External links

The Pasak Jolasit Dam project
Rivers of Thailand {{Thailand-river-stub