The Muma River (Muma He 牧马河) is a right tributary of the
Han River in the
Yangtze river basin
The Yangtze or Yangzi ( or ; ) is the longest river in Asia, the third-longest in the world, and the longest in the world to flow entirely within one country. It rises at Jari Hill in the Tanggula Mountains (Tibetan Plateau) and flows ...
of northern China. It has a length of and a drainage area of . It originates in and flows entirely within
Xixiang County
Xixiang County () is a county under the administration of Hanzhong City, in the southwest of Shaanxi province, China, bordering Sichuan province to the southwest. Its administrative center, Xixiang, formerly known as Hsihsiang, lies on the Muma ...
of
Shaanxi Province
Shaanxi (alternatively Shensi, see § Name) is a landlocked province of China. Officially part of Northwest China, it borders the province-level divisions of Shanxi (NE, E), Henan (E), Hubei (SE), Chongqing (S), Sichuan (SW), Gansu (W), ...
. The annual average flow is . It has a natural drop of and water reserves of 90,000 kilowatts.
It arises near the border with
Sichuan Province
Sichuan (; zh, c=, labels=no, ; zh, p=Sìchuān; alternatively romanized as Szechuan or Szechwan; formerly also referred to as "West China" or "Western China" by Protestant missions) is a province in Southwest China occupying most of the ...
at , flows northwest and debouches into the Han River at .
The main branch of the Muma River is navigable by small boats as far south as the village of Matsung T'an.
Notes
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{{China Rivers
Rivers of Shaanxi
Tributaries of the Yangtze River