Research on the abandoned Huanghe River Delta erosion process and impact on tidal current dynamic characteristic of the Huanghai Sea off the coast of North Jiangsu, China

Based on the restoring coastline position and the underwater topography of the Abandoned Huanghe River Delta coast in different developmental stages, since the Huanghe River turning over to the north,through establishing a wide range tidal wave mathematical model and a partial tidal current mathematical model, the Huanghai Sea tidal current characteristic and the change in different evolution stages of the delta have been studied.The result shows that the current velocity is relatively weak in the radial sand ridges, due to the abandoned Huanghe River coastline protruding more than 20 km, and the ambitious underwater delta, blocking the tidal wave of spread from north to south. With the Jiangsu coastline retreating, the abandoned Huanghe River undersea delta deplanation, revolution tide in the south Huanghai Sea gets strengthening, the average current velocity and the maximum current velocity are expressed as tended to increase in the Xiyang, Lanshayang and Xiaomiaohong waterways in the radial sand ridges.