Abstract

Tidal current data of two tidal periods at 30 tidal current surveying sites in Jiangsu radial sand ridge sea area are analysed respectively using the G·Godin`s tidal current computer programs revised by Foreman. Tidal current in the tidal channels belong to normal semidiurnal tidal current, M₂ constituent current dominates in the studied sea area. The direction of tidal current is along tidal channel by and large. On the basis of analyzing the two tidal periods successive tidal current and suspended sediment survey results of the 30 survey stations, the sediment carrying capacity formulae of tidal channels in Jiangsu radial sand ridge sea area are discussed by comparing analyse and fitting study methods. The sediment carrying capacity formulae which can be applied to each tidal channel then are found. And the sediment carrying capacity formulae which are adaptable to the tidal current channels are different in some extent. Study indicate that Sediment carrying capacity empiric formulae in U²/h format of the water course which the No.4~15 station are located in is different from the tidal current channel which the No.16-24 station are located in. For precision, and each expression in U²/h format are respectively are given in regress methods.

Keywords: radial sand ridges, tidal channel, suspended sediment concentration, sediment carrying capacity