Distribution of Rivers in Tianzhu Tibetan Autonomous County, Gansu Province

The rivers in Tianzhu County are divided into Shiyang River system (inland) and Yellow River system (outflow). The main rivers in the Yellow River system are Datong River, Jinqiang River and Shimen River, and the main rivers in Shiyang River system are Maozang River, Haxi River, Nancha River, Xiangshui River and Xidatan River, with rivers 17. The southwest mainly belongs to the Yellow River system, and the east mainly belongs to Shiyang River system.

Tianzhu County is located at the eastern end of Hexi Corridor and the northeast edge of Qinghai-Tibet Plateau. The geographical location is between east longitude 102 degrees 07 minutes-103 degrees 46 minutes and north latitude 3 1 minute -37 degrees 55 minutes. Yongdeng county in the south, Jingtai county in the east, Wuwei city and Gulang county in the north, Sunan county in the northwest and Menyuan, Huzhu and Ledu counties in Qinghai province in the west. East-west width 142.6 km and north-south length 158.4 km. The total area is 7 149 square kilometers. Tianzhu County is located at the intersection of Qinghai-Tibet Plateau, Loess Plateau and Inner Mongolia Plateau. The territory is high in the northwest and low in the southeast, with an altitude of 2040-4874 meters. The landform is mainly mountainous, and Wushaoling in the middle of the county runs through the east and west.