| 窦明,谢平,陈晓宏,左其亭.潮汐作用对河网区重金属输移的影响[J].水利学报,2007,38(8):966-971 |
| 潮汐作用对河网区重金属输移的影响 |
| Effect of tide action on transport of heavy metal pollutants in river network |
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| DOI： |
| 中文关键词: 西、北江河网区 重金属输移模型 潮汐作用 |
| 英文关键词: river network transport heavy metal pollutant tide 1-D transport model downstream of Zhujiang River |
| 基金项目: |
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| 摘要点击次数: 1965 |
| 全文下载次数: 211 |
| 中文摘要: |
| 根据相关文献，推导了只考虑溶解态和悬浮态输移过程的一维河流重金属输移模型的表达式。根据 2005年12月北江镉污染事故背景资料，对该模型的参数进行率定，以分析珠江流域西、北江河网区潮汐对重金属输移的影响。设定北江上游突发污染事故与下游大、中、小潮相遭遇的情景，将情景资料代入重金属输移模型进行模拟，根据模拟结果评价了事故对佛山市水厂供水带来的影响。分析结果发现，潮汐作用造成河流内水流往复震荡，对污染物的迁移过程影响较大；不同的潮汐作用导致西江、北江的水流补给形式发生变化，进而影响污染物的传播途径；污染事故与大潮相遭遇时，对供水造成的危害要远大于与中、小潮相遭遇时。 |
| 英文摘要: |
| The basic equation set for describing the transport of dissolved sub
stance, suspension and bed load established by other authors are introduced to deduce a simplified 1-D equation for expressing the transport of heavy metal pollutants in river network. The model is applied to analyze the movement of heavy metal pollutants in river network downstream of the Zhujaing River with the tide action taken into account. The parameters of the model are calibrated by the data of pollution accident took place in 2005 and then the probable pollution movement during different combinations of rivers discharges and tides can be simulated. It is found that the flow in river network oscillates to and fro due to the action of tide and remarkably affects the transport process of pollutant. In case the pollutant accident meets the occurrence of primary tide, the pollu
tant will seriously affect the water quality at the water supply intake for Fosan City. |
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