Analysis of the Influence of the Shibahu Channel on Water Level and Sediment in the Lower Reach Yellow River

Abstract It is necessary to study and analyze the Shibadu flow path as a prospective alternative flow path for the Yellow River diversion. In this paper, the established two-dimensional mathematical model is used to calculate the Shibadu flow path and analyze the water level characteristics of the Shibadu inlet channel and the influence of the ocean tide level on the upstream water level and on the sediment transport. From the calculation results and water-sediment characteristics, it can be seen that: the Shibahu diversion is located in a bend, so it has a high resistance to the upstream water flow, resulting in a small change in the upstream water level at the diversion, a high upstream water level, and a significant decrease in the water level after the diversion; the range of the spread of the sediment movement in the Shibahu is small, and coupled with the weak ocean dynamics, the ability to transport sediment to the outer sea is poor, resulting in the inlet sediment near the mouth gate. The variation of sediment entering the sea during the rising tide and the falling tide is the same and different: the sediment concentration increases at a certain distance during the rising tide, but not during the falling tide. Both cases are about 41km away from the entrance, sediment began to settle.