This study focuses on dynamic mechanism behind the formation of the freshwater zone around the Meimao Sandbank by use of 3D numerical simulation.The Meimao Sandbank is located along the southern bank of the South Pass...This study focuses on dynamic mechanism behind the formation of the freshwater zone around the Meimao Sandbank by use of 3D numerical simulation.The Meimao Sandbank is located along the southern bank of the South Passage in the Changjiang(Yangtze River) estuary,which is considered as a freshwater resource for Shanghai City.Interaction between runoff and tide is the main mechanism of the freshwater zone formation.However,the freshwater zone often suffers from saltwater intrusion in dry season.Tidal oscillation is stronger during spring tides,able to carry freshwater farther seaward.Therefore,it is more likely to occur during the ebb of a spring tide in dry seasons.In addition,the water zone is sensitive to runoff:when runoff decreases,it disappears,and vice versa.The northerly winds favor the formation of the freshwater zone.展开更多
Perch usually live in coastal waters but in early spring they venture into freshwater estuary areas to forage for food and lay eggs.Perch grow fast into large and fleshy fish,and are,therefore,much sought after by fis...Perch usually live in coastal waters but in early spring they venture into freshwater estuary areas to forage for food and lay eggs.Perch grow fast into large and fleshy fish,and are,therefore,much sought after by fishermen,particularly along Shanghai’s HuangpuRiver where they are considered a delicacy.Songjiang District of Shanghai City was once renowned for its perch,the Trachidermus fasciatus species,meaning展开更多
基金Supported by the Funds for Creative Research Groups of China (No. 40721004)the National Natural Science Foundation of China (No. 40976056)National Major Science and Technology Project of Water Pollution Control and Countermeasures (No. 2008ZX07421-001)
文摘This study focuses on dynamic mechanism behind the formation of the freshwater zone around the Meimao Sandbank by use of 3D numerical simulation.The Meimao Sandbank is located along the southern bank of the South Passage in the Changjiang(Yangtze River) estuary,which is considered as a freshwater resource for Shanghai City.Interaction between runoff and tide is the main mechanism of the freshwater zone formation.However,the freshwater zone often suffers from saltwater intrusion in dry season.Tidal oscillation is stronger during spring tides,able to carry freshwater farther seaward.Therefore,it is more likely to occur during the ebb of a spring tide in dry seasons.In addition,the water zone is sensitive to runoff:when runoff decreases,it disappears,and vice versa.The northerly winds favor the formation of the freshwater zone.
文摘Perch usually live in coastal waters but in early spring they venture into freshwater estuary areas to forage for food and lay eggs.Perch grow fast into large and fleshy fish,and are,therefore,much sought after by fishermen,particularly along Shanghai’s HuangpuRiver where they are considered a delicacy.Songjiang District of Shanghai City was once renowned for its perch,the Trachidermus fasciatus species,meaning
