Analysis of Impact on the Irrigation at the Irrigated Area along the Yangtze River after the Application of Three Gorges Project

After the application of three Gorges project, the sediment amount in the lower reaches of the Yangtze river will be significantly decreased, which would cause long period, long-distance adjustment in the lower reaches and result in the drop of the same flow rate water level; at the same time, the flow rate in the lower reaches would significantly be changed because of the reservoir regulation. These changes will impact on the irrigation of the irrigated area along the Yangtze river.In this paper, according to changes of the water and the sediment conditions that after the application of three Gorges project, predicts hydrological change trends, analyzes the sluices intake water conditions and its variation of ability, and the impact on the irrigation.