| China’s water resources show "more local water","less local water","general dirty water","general muddy water",water difficulties have been a major difficulty facing China for a long time,this difficulty largely restricts the people’s daily life and the durable economic development of the country.China’s water pollution is complex,regional and persistent,which determines that solving China’s water resources problem will be a lasting process that requires efforts.Ocean is an important part of water resources.There has appeared many large-scale Marine pollution incidents in China,which have caused very serious consequences.The Yellow Sea and the Bohai Sea are China’s two major offshore areas,and their water resources are getting worse and worse.This paper verifies the accuracy of the Hydro Info hydrodynamic and water quality model through three instances,in view of the water exchange laws of the Yellow Sea and Bohai Sea,building the water quality hydrodynamic value model as well as temporal and spatial pollutant distribution patterns,directiving the water exchange laws of them.The following conclusions are drawn:(1)The Hydro Info system is used to simulate the yellow and Bohai Sea tide trend field.The tide level process of the typical station coincides with the harmonic analysis and verification data.The tide flow speed field is reasonable,which shows that the three-dimensional hydrodynamic model simulating the yellow and Bohai Sea tide trend field is reliable.(2)Considering the flux of pollutants in the Yellow and Bohai Sea,and simulating the convection diffusion transport of the main pollutants in the Yellow and Bohai Sea,the calculated simulation value is close to the measured data,indicating that the transport simulation mathematical model is credible.(3)There are many rivers in Liaodong Bay,the Bohai Bay and Laizhou Bay into the sea,the water quality of the rivers into the sea is poor,and the hydrodynamic field is weak,which is not conducive to the convection transport of pollutants to the outer sea.Therefore,strictly controlling the water quality of the rivers into the sea is the main means to improve the water environment of the Bohai Sea.(4)After considering the influence factors of water vapor exchange flux and solar radiation,water temperature and pollutant attenuation coefficient are simulated.The calculation results show that in Liaodong Bay,Bohai Bay and Laizhou Bay,the summer pollutant concentration increases by the pollutant flux into the sea,leading to the increase of pollutant concentration.In the Yellow Sea,the degradation coefficient‘k’ value plays a leading role,and the pollutant concentration has decreased in summer compared with that in spring. |
