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In order to determine reasonable channel layout and maintenance the dredging areas, this paper set up mathematics model of two-dimensional water flow for channel, and the numerical simulation results are verified by the observed data. Based on this, the fluid field change laws of Xigang channel in flood, median and low water levels are analyzed, the dredging layout scheme of Xigang channel is proposed, and the water velocity changes in Xigang channel before and after dredging maintenance are compared. The results show that the following dredging layout scheme is reasonable, the entrance of Xigang channel is located at main flow area of Dongliu waterway, the left border line of Xigang channel is close to the channel regulation project and the main channel from Tiansha islet to the downstream, the right boundary will depend on the wide requirements of the channel, and the channel outlet can smoothly connect to water flow.

The Dredging Layout Scheme Research of Xigang Channel in Dongliu Waterway