Analysis on the Cause of Formation of Floating Sludge in Outer Channel of Shenhua Huanghua Port

In the recent survey, the thickness of the floating sludge layer in the outer channel of Shenhua Huanghua Port is obviously larger than that in the inner channel, which is different from the law of historical survey. Based on analysis of the sediment survey, this paper first describes the distribution characteristics of surface sediment in the surveyed area, and draws the conclusion that silt is the dominant distribution, and that the area with the coarsest sediment should be the accumulation area of sediment with medium sediment environment. The strong overflow outside the entrance has a strong effect on the sediment reconstruction, and the south side of the entrance is a weak flow area, and the hydrodynamic environment is weak for the sediment reconstruction. Then, through Gao. Collins model analysis and calculation of sediment transport trend, it is concluded that the south section of the breakwater entrance of Shenhua Huanghua Port is a "sink" of sediment, and the surrounding sediment accumulates to it under the action of hydrodynamic force. As the accumulation area is close to the channel, the finer components of the sediment particles enter the channel with the rising tide current during the process of the sediment transportation to this area, which increases the thickness of the floating sludge layer formed on the basis of other dynamic forces.