Analysis of lmpact of Layout of Entrance Axis of Excavated-in Basin upon Siltation in Harbour Basin for River Ports

Based on the turbid and clear water model tests,the hydraulic properties of return water when the axis of an excavated-in basin forms different θ angles with the main stream;and the siltation intensity,volume of silt and distribution of siltation,when the layout of the excavated-in basin is designed,related to different θ angles and the quantity of sediments in the main stream are analyzed.The relationship between θ and siltation thus obtained can provide an important basis for rational layout of excavated-in harbour basins on inland rivers.The results of the research are compared with the data of field investigation and are found to tally well with each other.