Anning River

The Anning River (pinyin: Ānníng Hé, Yi, At Hxop Nyo Yy) is a river in the Hengduan Mountains region of southwestern Sichuan, China. The river is a tributary of the Yalong River, itself a tributary of the Jinsha River which is the head stream of the Yangtze. The river is located primarily in Liangshan Prefecture except for the mouth of the river which enters the Yalong in Panzhihua Prefecture.

The Anning River has its source at the southern Xiaoxiang Range in Mianning County, Liangshan. From here, it flows in a southerly direction between the southern Daxue Mountains and the Xiaoxiang through the Anning River Plain and meets its largest left tributary, the Sunshui River, at Luguzhen. Measured to the furthest source, the Sunshui forms the main stem of the Anning. Continuing south, the Anning River Plain widens and provides for greater human activity. The capital of Liangshan, Xichang, is located at the widest extent of the valley to the east of the river. The Anning exits the Anning River Plain in Dechang County and flows south-southwesterly until it meets the Yalong River in Yanbian County, Panzhihua. The total length of the river is 320 km (200 mi). Unlike other larger river valleys in the region, including those of the deeply-incised Yalong and Jinsha Rivers, the Anning River has a relatively flat valley known as the Anning River Plain. For the 125 km (78 mi) section of river between Mianning and Dechang, the valley stretches between 4 km (2.5 mi) and 10 km (6.2 mi) wide. The Anning River Plain is the largest valley plain in southwest Sichuan with an area of 1,800 km2 (690 mi2) and its fertile soils support a variety of agricultural activities. The plain, and in fact the entire Anning River's course, follows the tectonically active Anninghe Fault where a southeastern portion of the Tibetan Plateau abuts the Yangtze Plate. Qiong Lake is found on the eastern edge of the Anning River Plain, approximately 10 km (6.2 mi) from the Anning River.

Flows through: People's Republic of China.

River data from Wikidata (CC0); lengths normalised to a common unit.