The Yom River (Thai: แม่น้ำยม, RTGS: Maenam Yom, pronounced [mɛ̂ː.náːm jōm]; Northern Thai: น้ำแม่ยม, pronounced [náːm mɛ̂ː.ɲōm]) is a river in Thailand. It is the main tributary of the Nan River (which itself is a tributary of the Chao Phraya River). The Yom River has its source in the Phi Pan Nam Range in Pong District, Phayao Province. Leaving Phayao, it flows through the Phrae and Sukhothai provinces as the main water resource of both provinces before it joins the Nan River at Chum Saeng District, Nakhon Sawan Province.
Tributaries of the Yom include the Nam Mae Phong, Ngao River, Nam Ngim, Huai Mae Sin, Nam Suat, Nam Pi, Mae Mok, Huai Mae Phuak, Mae Ramphan, Nam Mae Lai, Nam Khuan, and Nam Mae Kham Mi.
The Yom river and its tributaries drain a total area of 24,047 square kilometres (9,285 sq mi) of land (called the Yom Basin) in the provinces of Sukhothai, Phitsanulok, Phichit, Phrae, and Lampang.[2] The Yom Basin is part of the Greater Nan Basin and the Chao Phraya Watershed.
En 1991 se planeó una controvertida gran presa en el río Yom en el área central de las montañas Phi Pan Nam en Kaeng Suea Ten, pero el proyecto fue abandonado más tarde. [3] El debate sobre la presa se abrió nuevamente en 2011. [4] Actualmente se está debatiendo una propuesta para construir dos presas más pequeñas en el río Yom en el área en lugar de la megapresa Kaeng Suea Ten. [5]
El río Yom atraviesa el Parque Nacional Mae Yom en la provincia de Phrae .
19°23′24″N 100°27′18″E / 19.39000°N 100.45500°E / 19.39000; 100.45500