The arid valleys of the Hengduan Mountainous Region consist of the valleys of the Minjiang River, the Dadu River, the Anning River, the Yalong River, the Jinsha River, the Lancang River, the Nujiang River and their tributaries.

• 横断山区干旱河谷有四类,即干热河谷、干暖河谷、干温河谷和干凉河谷。