| 通过周期性换水更新城市湖泊水质的解析模型 |
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| 引用本文： | 朱春龙,俞国青.通过周期性换水更新城市湖泊水质的解析模型[J].灌溉排水学报,2003,22(6):54-56. |
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| 作者姓名： | 朱春龙 俞国青 |
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| 作者单位： | 河海大学,水利水电学院,江苏,南京,210098 |
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| 摘 要： | 基于具有周边环境连续输入的充分混合的反应器原理及一些简化假设,提出了借助周期性地引排换水改善城市湖泊水质的数学模型,导出了城市湖泊中污染物平均浓度和水质改善指标的解析表达式。模型包含了污染物综合降解系数、引排换水周期、湖泊中原来的水质、引入水的水质、湖泊承受的污染负荷以及引排历程等各项影响因素。并证明了在一定的条件下,坚持周期性的引排操作将使湖泊水质及水质改善指标趋向稳定。模型可用于城市湖泊水环境治理的规划设计,亦可为此种治理工程运行参考。
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| 关 键 词： | 解析模型 城市湖泊 水质 周期性换水 |
| 文章编号： | 1000-646X(2003)06-0054-03 |
| 修稿时间： | 2003年11月6日 |
A Mathematical Model of Water Quality Rehabilitation for Urban Lakes via Periodically Water Renewal |
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| ZHU Chun-long,YU Guo-qing.A Mathematical Model of Water Quality Rehabilitation for Urban Lakes via Periodically Water Renewal[J].Journal of Irrigation and Drainage,2003,22(6):54-56. |
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| Authors: | ZHU Chun-long YU Guo-qing |
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| Abstract: | For polluted urban lakes, periodically discharging the polluted lake water and diverting clean water from outside water mass is proven to be a cost-effective practice in some cases for rehabilitation of water quality in the lakes by taking the advantage of large environmental capacity of outside water mass. A mathematical model of water quality rehabilitation for urban lakes via such operations has been developed based on the principle of fully-mixed reactor with continuous side-input and some simplifying assumptions in this paper. Analytical expressions for the mean concentration of pollutant and water quality improvement factor in the lakes are presented, which take pollutant degradation, diverting and discharging period, the original water quality, outside water quality, pollution load, and the diverting and discharging history into account. It is shown that the mean concentration and water improvement factor tend to be steady under certain conditions when the same operation continues. The model can be used in planning and design of urban lake water environment remedy and give a help in the operation of such a kind of project. A simple example is given to illustrate the application of the model. |
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| Keywords: | analytic model urban lakes water quality periodical rehabilitation |
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