RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2010, Vol. 19 >> Issue (2): 146-.

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DELINEATION METHOD OF SOURCE PROTECTION ZONES FOR TIDAL ESTUARY RESERVOIR

LU Shiqiang1| LIN Weiqing1| GU Yuliang2| LI Wei3| ZHANG Hongwei3, DING Ling3   

  1. (1.Shanghai Academy of Environmental Science, Shanghai |200233, China；2.Shanghai Qingcaosha Raw Water Ltd| Shanghai 200120, China； 3.Shanghai Investigation,Design &|Research Institute| Shanghai 200434, China)
  • Online:2010-02-20

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Abstract:

The Yangtze Estuary is the most important drinking water source in Shanghai.However,the water source protection zone has not been delineated.At present,the domestic delineation methods of source protection zones have some disadvantages such as less scientific and less applicable,when it is used for source reservoir in tidal estuary.In this paper,reviews on the delineation methods of source protection zones were made.The characteristics of tidal estuary such as toandfor flow,susceptibility the accidental spillage,the demand of water purification and prevention from the risk for accident spill were analyzed.Then the principle of taking full use of the selfpurify capacity and the method of pollutant maximum travel distance were provided in the delineation of source protection zones.Taking ammonia as the control factor,the protection zone I of Qingcaosha Reservior could take the role of selfpurification for protection zone Ⅱ.Taking the seasonal wind into account,the flow velocities of the water intake at 99% probability were used to calculate the maximum travel distance, which were used to define the upstream,downstream and transverse boundary of the protection zone Ⅱ.This method was used to delineate Qingcaosha source protection zone in the Yangtze estuary,and the results shows it is a simple and reliable method with a clear concept.

Key words: tidal estuary/ reservoir/ drinking water source/ delineation of source protection zone/ maximal flow travel distance

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