Abstract: The data of treering of [WTBX]Populus euphratica[WTBZ] and monthly and annual runoff volumes of the Tarim River in Xinjiang during the period from 1957 to 2010 were analyzed using the methods of dendrohydrology and correlation analysis. The results are as follows: ① The radial growth of [WTBX]P.euphratica[WTBZ] changed significantly along the 4 profiles in the upper and middle reaches of the Tarim River. A peak value occurred during the period from the 1980s to the 1990s, and then it was in a gradual decrease trend. The change of annual radial growth of [WTBX]P.euphratica[WTBZ] along two profiles in the lower reaches of the Tarim River was not obvious before 2000, but the annual radial growth began to sharply increase after 2000; ② The MannKendall mutation analysis was used to analyze the change of radial growth of [WTBX]P.euphratica[WTBZ] along 6 profiles. The result showed that the mutation of radial growth of [WTBX]P.euphratica[WTBZ] along the profiles of Xoxak, Xinquman, Shazihekou, Archik, Yengisu and Yiganbjima occurred in 1996, 1999, 1991, 2000, 1998 and 1960 or 1968 or 1978 respectively; ③ There was a high correlation between the radial growth of [WTBX]P.euphratica[WTBZ] and the runoff volume in the upper and middle reaches of the Tarim River in January and February, but a high negative correlation between the radial growth of [WTBX]P.euphratica[WTBZ] and the runoff volume in the lower reaches.

Key words: Populus euphratica')">Populus euphratica, radial growth; runoff volume, correlation analysis, Tarim River