Numerical Simulation Study On Field Test Of Combined Ecological Process For Treatment Of Light-polluted Water

As the water environment problems caused by urbanization need to be solved urgently,combined ecological process and other technologies are widely used in the purification of micro-polluted water.The mathematical simulation of water environment can analyze the hydrodynamic process and solute migration and transformation of water,which has become a widely used technical means in the research on water environment treatment and engineering constructionCombined with the field test of water quality guarantee ecological water treatment system technology of " four series combination process " project of " Xinkai River to Taipingchi Reservoir Project",Collect data on elevation,hydrology,atmosphere,vegetation,water quantity and water quality of the test site.Delft3 D software was used to divide the research area into grids.The generalized variable grid system can improve the computational efficiency on the premise of satisfying the accuracy.Introducing environmental fluid dynamics EFDC model of open source code,simulated during testing ground water depth and velocity space-time change process,grasp the change law of water dynamics model calibration and verification of simulated water depth degree of good agreement with the measured depth,water depth measurement and simulation value control within the scope of the 0.086 m difference,flow velocity measured value and the simulation value error control within 0.043 m/s.The water quality model WASP was used to simulate the removal of chemical oxygen demand(COD)in the pan-oxidized pond.Different degradation rates were set in the software,and related water quality parameters and plant parameters were adjusted to simulate the COD removal effect in aeration engineering and non-aeration engineering.The average relative error of simulation results was less than 12.14% to explore the influence of aeration on COD removal.The COD removal rates of aeration unit and non-aeration unit were 7.62% and 6.30% respectively.The fuzzy mathematical method based on entropy weight operation was used to evaluate the water quality of each working condition.Original water pollution is serious,as part of the Ⅴ water,through the combination of water ecological treatment process can effectively improve water quality,different seasons of water treatment effect is not the same.Different seasons have different effects on water treatment.The application of water environment model and fuzzy mathematics to analyze the variation trend of water quantity and quality in the combination of ecological process to treat light-polluted water can provide scientific basis and technical support for relevant water treatment experiments or projects,and provide reference and guidance for the planning,management and protection of light-polluted water treatment projects.Using water environment model and fuzzy mathematics to analyze the changing trend of water quantity and quality of light polluted water treatment experiment can provide scientific basis and technical support for relevant water treatment experiment or project,and have certain reference and guiding significance for the planning,design and operation of light polluted water treatment technology.