Research on Hydrodynamic Control and Guide of Xixianghe River Mouth Water Environment Improvement in Shenzhen

Before the construction of Dachanwan Jetty Wharf,the mouth of Xixianghe River faced the Lingdingyang Bay directly.The strong tidal dynamic power facilitated the water environment to keep clean around the mouth area.The construction of the Dachanwan Jetty Wharf enclosed the open bay into a semi-closed one.Xixianghe River mouth is located at the furthest part of the wharf and the water exchange with the open sea was largely reduced.The dramatic hydrodynamic variation tampered with the full dilution of the polluted water from upstream and the pollutants were accumulated within the mouth area as well as the harbor basin,worsening the water environment.This situation was aggravated day by day.The various hydrodynamic control and guide schemes are figured out to improve the water quality of Xixianghe River.