Evaluation of Management Scenarios for Controlling Eutrophication in a Shallow Tropical Urban Lake
Evaluation of Management Scenarios for Controlling Eutrophication in a Shallow Tropical Urban Lake
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DOI：
10.11159/ijepr.2014.010
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
Zikun Xing;L. Chua;J. Imberger
中科院分区：
文献类型：
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作者：
Zikun Xing;L. Chua;J. Imberger
城市湖泊通常比天然湖泊更小，更浅，更容易受到人类活动的影响。虽然有害藻华（HABs）与城市湖泊富营养化的影响已成为水资源管理和环境保护日益关注的问题，集中在这一主题的研究与城市湖泊是罕见的，知识的生态动力学和有效的管理策略，以控制城市湖泊富营养化是缺乏的。本研究应用三维水动力学-生态综合模型对新加坡的一个小型热带城市浅水湖泊进行模拟，并对控制湖泊富营养化的各种管理方案进行评估。结果发现，在湖处理技术，包括人工脱层，沉积物操纵和除藻剂除了是无效的或具有环境问题，而流域管理策略，包括水力冲洗和流入营养盐减少是更有效的，并已造成较少的环境问题。在本研究中，流入磷减少被认为是最好的策略后，评估的优点和缺点的管理策略研究。流域径流对城市湖泊有重要的影响，因此，在流域层面上进行水资源综合管理是控制富营养化的关键。
Urban lakes are typically smaller, shallower, and more exposed to human activities than natural lakes. Although the effects of harmful algal blooms (HABs) associated with eutrophication in urban lakes has become a growing concern for water resources management and environmental protection, studies focussing on this topic in relation to urban lakes are rare and knowledge of the ecological dynamics and effective management strategies for controlling eutrophication in urban lakes is lacking. This study applied an integrated three-dimensional hydrodynamics-ecological model for a small shallow tropical urban lake in Singapore and evaluated various management scenarios to control eutrophication in the lake. It is found that in-lake treatment techniques including artificial destratification, sediment manipulation and algaecide addition are either ineffective or possess environmental concerns; while watershed management strategies including hydraulic flushing and inflow nutrients reduction are more effective and have posed less environmental concerns. In this study, inflow phosphorus reduction was found to be the best strategy after evaluating the advantages and drawbacks of the management strategies studied. Runoff from the watershed exerts significant influence on urban lakes and thus an integrated water resources management at the watershed level is critical for the control of eutrophication.