Periodic changes of stream flow in the last 40 years in Tarim River Basin, Xinjiang, China.

The article analyzes the periodic properties of the annual runoff series for the last 40 years in Tarim River Basin in Xinjiang, China which were collected at hydrological gauging stations in its three main branches. It notes that analysis of variance and extrapolation method were employed to identify the annual runoff periods and predicted the future changes in the watershed using simulation methods. It also mentions that the Global Climate Model (GCM) has predicted the basin's long term trend of runoff because of the global increase in air temperature and precipitation in 1990.