Simulation of Flow Field in Pre-dams and Phosphorus Elimination during Rainstorm
- 作者：Lu xiwuLi binNing pingZhang renfeng
- 会议时间：2009-11-01
- 关键词：Simulation ; Pre-dams ; Flow field ; Rainstorm course ; Phosphorus removal
- 作者单位：Lu xiwu(Department of Environmental Engineering,Southeast University,Nanjing 210096,China)Li bin(Department of Environmental Engineering,Southeast University,Nanjing 210096,China;Faculty of Environmental,Kunming University of Science & Technology,Kunrning,P.R.China,650093)Ning ping,Zhang renfeng(Faculty of Environmental,Kunming University of Science & Technology,Kunrning,P.R.China,650093)
- 母体文献：第十三届世界湖泊大会论文集
- 会议名称：第十三届世界湖泊大会
- 会议地点：武汉
- 主办单位：中国环境科学学会
- 语种：chi
摘要
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.