Simulation of Flow Field in Pre-dams and Phosphorus Elimination during Rainstorm
Pre-reservoirs are comparatively small reservoirs with an average water retention time of a few days.They are normally situated immediately above the larger main reservoirs whose inflowing water quality it is their purpose to improve.There are a number of physicochemical and biochemical processes within the pre-reservoirs,which hold back eutrophication in lakes.Numerical simulation was established in the paper and validated by the course of the rainstorm following after 25 hours,which shows that the flow field can help to make the water in pre-dam effuse and prevent the Dianchi Lake water from recharging.Soluble reactive phosphorus(SRP) eliminafion was calculated along the whole rainfall process with the simulation.The result shows that the simulation is identical to the calculated result and is able to account for SRP removal in pre-dams along the rainfall.SRP removal efficiency is over forty-eight percent in despite of rainstorm and so the pre-dam technique may be a rewarding choice for non point pollution control,especially for hypereutrophic lakes and reservoirs.So pre-dams may be a good and new technology for water purification in lakes for non-point pollution.
Simulation Pre-dams Flow field Rainstorm course Phosphorus removal
Lu xiwu Li bin Ning ping Zhang renfeng
Department of Environmental Engineering,Southeast University,Nanjing 210096,China Department of Environmental Engineering,Southeast University,Nanjing 210096,China;Faculty of Environ Faculty of Environmental,Kunming University of Science & Technology,Kunrning,P.R.China,650093
国内会议
武汉
英文
2025-2032
2009-11-01（万方平台首次上网日期，不代表论文的发表时间）