In this preliminary study, it is shown that for a reservoir on a river of rich runoff, such as the Yangtze, elaborate scheme of sediment management may be devised to substantially reduce reservoir deposition. The mathematical model applied in this investigation has been fairly well verified with long - term field data of sediment transport by unsteady flow in the Lower Yellow River. In view of the importance of TGP, however, further investigation with physical models and mathematical model of other versions is planned. Great financial benefits are involved.