Tha Chin

The Tha Chin river (Thai: แม่น้ำท่าจีน, rtgs: Maenam Tha Chin, pronounced [mɛ̂ːnáːm tʰâː tɕiːn]) is a distributary of the Chao Phraya river, Thailand. It splits near the province of Chai Nat and then flows west from the Chao Phraya through the central plains, until it empties into the Gulf of Thailand in Samut Sakhon Province.

The Tha Chin river has many regional names. After it splits from Chao Phraya river at Chai Nat, it is called Makham Thao River; while passing Suphan Buri it is the Suphan River; while passing Nakhon Pathom it becomes the Nakhon Chai Si river. Only near its mouth at Samut Sakhon does it become the Tha Chin River, named after the former name of Samut Sakhon. The name Tha Chin is the convention used in most scientific documents.

Tributaries of the Tha Chin include the Kra Sieo, Yang, Tawip, Chorakhe Sam, Bang Len, and Chin Si Rivers.

The Tha Chin drains a total area of 13,681 square kilometers (5,282 sq mi). The Tha Chin Basin is part of the Chao Phraya Watershed.

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