Based on the hydrological data in 1956 through 2009 at representative gauging stations, the charac teristics of the runoff and sediment discharge of the Three Channels from the Jingjiang River are investigated, using MannKendall trend test and double mass analyses. The results show that the annual runoff and the an nual sediment load of the Three Channels decreased significantly during 1956 2009. Moreover, the time of the earliest abrupt change was in the Ouchi Channel （in 1978 and in 1986）, indicating which had the most serious changes. The ...
