Yom River
title: "Yom River" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["rivers-of-thailand", "nan-river"] topic_path: "general/rivers-of-thailand" source: "https://en.wikipedia.org/wiki/Yom_River" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::data[format=table title="Infobox river"]
| Field | Value |
|---|---|
| name | Yom River |
| name_other | แม่น้ำยม |
| image | Si Samrong District from Bangkok Airways flight PG 214 (2025-11) - img.jpg |
| image_size | 275px |
| image_caption | Aerial photo of the Yom River in Si Samrong district, Sukhothai province |
| map | Chaophrayarivermap.png |
| map_caption | Map of the Chao Phraya River drainage basin showing the Yom River |
| subdivision_type1 | Country |
| subdivision_name1 | Thailand |
| length | 700 km |
| discharge1_location | Nakhon Sawan |
| discharge1_avg | 103 m3/s |
| discharge1_max | 1916 m3/s |
| source1_location | Bun Yuen village, Pong district, Phi Pan Nam Range, Phayao Province |
| source1_elevation | 347 m |
| mouth | Nan River |
| mouth_location | Chum Saeng district, Nakhon Sawan province |
| mouth_elevation | 28 m |
| basin_size | 24047 km2 |
| tributaries_right | Ngao River |
| :: |
| name = Yom River | name_native = | name_native_lang = | name_other = แม่น้ำยม | name_etymology = | image = Si Samrong District from Bangkok Airways flight PG 214 (2025-11) - img.jpg | image_size = 275px | image_caption = Aerial photo of the Yom River in Si Samrong district, Sukhothai province | map = Chaophrayarivermap.png | map_size = | map_caption = Map of the Chao Phraya River drainage basin showing the Yom River | pushpin_map = | pushpin_map_size = | pushpin_map_caption= | subdivision_type1 = Country | subdivision_name1 = Thailand | subdivision_type2 = | subdivision_name2 = | subdivision_type3 = | subdivision_name3 = | subdivision_type4 = | subdivision_name4 = | subdivision_type5 = | subdivision_name5 = | length = 700 km | width_min = | width_avg = | width_max = | depth_min = | depth_avg = | depth_max = | discharge1_location= Nakhon Sawan | discharge1_min = | discharge1_avg = 103 m3/s | discharge1_max = 1916 m3/s | source1 = | source1_location = Bun Yuen village, Pong district, Phi Pan Nam Range, Phayao Province | source1_coordinates= | source1_elevation = 347 m | mouth = Nan River | mouth_location = Chum Saeng district, Nakhon Sawan province | mouth_coordinates = | mouth_elevation = 28 m | progression = | river_system = | basin_size = 24047 km2 | tributaries_left = | tributaries_right = Ngao River | custom_label = | custom_data = | extra = The Yom River (, , ; , ) 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
Tributaries of the Yom include the Nam Mae Phong (น้ำแม่ผง), Ngao River, Nam Ngim, Huai Mae Sin, Nam Suat (น้ำสวด), Nam Pi, Mae Mok, Huai Mae Phuak, Mae Ramphan, Nam Mae Lai, Nam Khuan, and Nam Mae Kham Mi.
Yom Basin
The Yom river and its tributaries drain a total area of 24047 km2 of land (called the Yom Basin) in the provinces of Sukhothai, Phitsanulok, Phichit, Phrae, and Lampang. The Yom Basin is part of the Greater Nan Basin and the Chao Phraya Watershed.
A controversial large dam was planned on the Yom River in the central area of the Phi Pan Nam mountains in Kaeng Suea Ten in 1991 but the project was later abandoned. The debate about the dam was opened again in 2011. Currently a proposal is being debated to build two smaller dams on the Yom River in the area instead of the Kaeng Suea Ten mega-dam.
Protected areas
The Yom River flows through Mae Yom National Park in Phrae Province.
Gallery
แก่งหลวง พะเยา Kaeng Luang, Phayao 09.jpg|Yom River at Kaeng Luang in Doi Phu Nang National Park near Chiang Muan File:Phi pan nam range-yom river-long district1744.JPG|The Yom River and the Phi Pan Nam Range, Long District, Phrae Province Yom River in Sukhothai.jpg|By the Wat Rachathani Temple in Sukhothai province
References
References
- (25 April 2017). "Longest Rivers in Thailand".
- [http://en.pwa.co.th/l_basins.htm Basins of Thailand]{{dead link. (July 2016)
- {{usurped
- [http://www.bangkokpost.com/news/politics/251708/floodgates-reopen-in-dam-debate. Bangkok Post Floodgates reopen in dam debate]
- [http://www.bangkokpost.com/news/local/277399/study-to-decide-yom-river-fate Bangkok Post - Study to decide Yom River fate]
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