Study The Effect Of Construction Of Wharf At Shishou Reach Of The Jingjiang River On Flood Defence

Shishou Port locates in the mid reaches of the Yangtze River, which is the connection between Dongting Lake Plain and Jianghan Plain and an important port for the commodity exchanging between Hunan and Hubei. In recent 10 years, due to the change of the river bend and river circumstances, sediment was deposited in the original port area and the port could not be used and thus confined the economic development of the hinterland. It is necessary to build a 6-berth dock to meet the needs of the export of the cargo. According to the related regulation, the study of the influence of the project on the flood discharge is required.This paper reviewed the developments in 2-D numerical model of the water flow. By means of the latest observation data of the prototype, the detailed analysis was made on the major thalweg, section, island and bottomland, the erosion and deposition of the river bed and the scour hole near the dock and the law of the fluvial process was obtained. Based on the related references, the evolution trend of the channel after the Three Gorges was finished was predicted. The 2-D mathematical model of the water flow was set up and validated using the latest data. With the model, the flow and velocity of several cases were calculated. The stability computation of the bank at the typical section under difference conditions was carried out by adopting the world widely used Geo-Slope slope stability analysis program. Finally, the synthetical evaluation on the influence of the project on the flood level, velocity, river circumstances, bank protection and flood prevention was made and the conclusion that the construction of the dock had little effect on the flood discharge was obtained.