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How the integrated engineering solutions can support the lakes restoration?
Ecohydrology & Hydrobiology ( IF 2.6 ) Pub Date : 2020-06-24 , DOI: 10.1016/j.ecohyd.2020.06.004
Julita A. Dunalska

A method of the simultaneous reduction of external and internal load of phosphorus as a new solution for lake restoration is presented. A flow-through, stratified lake, with diverse morphometry was selected for the study. In all three parts of the lake, an oxygen deficit was noted at the lake bottom at peak summer stagnation, with a simultaneous increase in mineral forms of phosphorus (the concentration of orthophosphates at sites I, II and III reached 0.301, 0.318 and 0.395 mg P l−1, respectively). Additionally, a large load of nutrients originating from the main inflow (annual load of 14395.9 kg P y−1 and 16 4829.8 kg N y−1), indicates that the conditions present in the lake are conducive to more intensive eutrophication. In this situation, reduction of the main loads of nutrients can be achieved by the simultaneous employment of pipelines delivering oxygenated water to the lake bottom during summer stagnation and a pipeline withdrawing deoxygenated and nutrient-rich water from the bottom in the vicinity of the outflow from the lake. It has been calculated that during the period of summer stagnation (VI-IX), the operation of delivering pipelines can reduce the phosphorus load from the main inflow by 5800.5 kg (40.3%). Using the pipeline withdrawing (site III), the amount of phosphorus removed from the lake would increase by 30.4% (from 2259.6 kg to 3247.8 kg). An additional solution, can be dosing the precipitating substances into the pipes delivering water to the lake, which will enable precise inactivation of phosphorus.



中文翻译:

综合工程解决方案如何支持湖泊恢复?

提出了一种同时降低磷内部和外部负荷的方法,作为湖泊修复的新方法。选择了具有不同形态的流层湖。在该湖的所有三个部分中,夏季夏季停滞高峰时,在湖底都发现了缺氧现象,同时磷的矿物质形态也增加了(I,II和III位的正磷酸盐浓度分别达到0.301、0.318和0.395 mg分别为P l -1)。此外,大量营养来自主要流入(每年的负荷为14395.9 kg P y -1和164829.8 kg N y -1),表明该湖中存在的状况有利于更富营养化。在这种情况下,可以通过在夏季停滞期间同时使用向湖底输送含氧水的管道和从河水流出附近从底部抽出脱氧且营养丰富的水的管道同时使用来减少养分的主要负荷。那个湖。经计算,在夏季停滞期间(VI-IX),输水管道的运行可使主要流入的磷负荷减少5800.5 kg(40.3%)。使用抽水管道(站点III),从湖泊中去除的磷量将增加30.4%(从2259.6千克增加到3247.8千克)。另一个解决方案,

更新日期:2020-06-24
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