Geography
Except for the Daen Lao Range (ทิวเขาแดนลาว) at the far northern edge, all ranges in the north of Thailand are roughly aligned from north to south. They are linked to a wide system of ranges in neighboring Burma and Laos that does not have a specific name for the whole, "Thai highlands" being the term generally restricted to the Thai area. Broadly defined, and based on their geological composition, there are two mountainous subsystems in Northern Thailand:
- In the western part the ranges stretching southwards from the Daen Lao Range, in the southern region of the Shan Hills or Shan Highland, with the two parallel mountain chains of the Thanon Thong Chai Range (เทือกเขาถนนธงชัย). This area has the highest elevations, with Doi Inthanon, the highest point in Thailand, reaching 2,565 metres (8,415 ft). The Dawna Range (ทิวเขาดอยมอนกุจู) forms the western border of Thailand between Mae Hong Son and the Salween River,
- The remaining mountainous region of parallel ranges that extend into northern Laos includes the Khun Tan Range (ทิวเขาขุนตาน), the Phi Pan Nam Range (ทิวเขาผีปันน้ำ), the Phlueng Range (ทิวเขาพลึง) as well as the western part of the Luang Prabang Range (ทิวเขาหลวงพระบาง).
A great part of the highland area is drained by rivers Ping, Wang, Yom and Nan, all tributaries of the Chao Phraya River flowing in a roughly southern direction. The ranges separating the main rivers are generally steep, high and continuous. Towards the east, as well as in the Wang and Yom drainage basins, they are lower. The Pai River in the northwest flows westwards into the Salween and the northeastern part is drained by rivers of the Mekong basin, like the Kok and Ing.
Read more about this topic: Thai Highlands
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