Numerical Simulation of Hydrodynamic Water Quality of Daliao River Based on Delft3D
In recent years,the rapid development of industrialization in the Daliao River Basin has brought about a se-ries of water quality deterioration problems.Therefore,this article establishes a two-dimensional hydrodynamic model of the Daliao River based on Delft3D through measured hydrological and water quality data,and verifies its water level and temperature.The calculated values are basically consistent with the measured values.A water quality model based on the hydrodynamic model is established,and the model is verified by NH4+-N(ammonia nitrogen)and DO(dissolved oxy-gen).The calculation results are basically sufficient to reflect the real trend of water quality changes.The characteristics of the dynamic water quality transport in the Daliao River were analyzed by the validated hydrodynamic water quality cou-pling model.The results show that the Daliao River has obvious semi-diurnal tidal characteristics,and the flow velocity at the estuary is lower than that of the inland river channel;The interannual distribution of NH4-N concentration is relative-ly uniform,and the DO concentration is lower in summer and higher in winter;During high tide,the concentration of NH+-N at the estuary decreases,while during low tide,the concentration of NH4+-N at the estuary increases;The peak concentration of pollutants discharged during the flood season is higher than that during the dry season,and the peak time is also earlier than that during the dry season.During the dry season,pollutants are more likely to remain at the estuary;Both integrated discharge outlets and emission reduction methods can reduce the concentration of pollutants in the river.The integrated discharge outlet near the upstream of the river is better than the emission reduction method,while the e-mission reduction method near the river mouth is slightly better than the integrated discharge outlet.The research results can provide reference for the water quality management of the Daliao River.
Daliao RiverDelft3Dtwo-dimensional hydrodynamic modelwater quality model
NETL
NSTL
万方数据
维普
