华东师范大学学报(自然科学版) ›› 2013, Vol. 2013 ›› Issue (5): 1-8， 26.

• 河口海岸学 •    下一篇

长江河口东风西沙水库最长连续不宜取水天数数值模拟

朱建荣, 吴 辉   

  1. 华东师范大学 河口海岸学国家重点实验室，上海 200062
  • 收稿日期:2012-11-01 修回日期:2013-01-01 出版日期:2013-09-25 发布日期:2013-09-30

Numerical simulation of the longest continuous days unsuitable for water intake in the Dongfengxisha reservoir of the Changjiang Estuary

ZHU Jian-rong, WU Hui   

  1. State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China
  • Received:2012-11-01 Revised:2013-01-01 Online:2013-09-25 Published:2013-09-30

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摘要： 应用改进的长江河口盐水入侵三维数值模式，计算东风西沙水库最长不宜取水天数.利用2007—2008年10个水文站盐度资料对模式进行了验证，计算结果与实测值吻合良好.以径流量特枯的1978—1979年作为水文计算年，考虑三峡工程、南水北调东线工程和沿江引排水对大通实测逐日径流量的修正，并考虑潮汐、风应力和混合等作用，采用2008年实测地形资料，计算得出最长连续不宜取水天数为26 d.这一重要参数已在水库建设中采用，为崇明岛生态岛的建设和淡水资源的保障及安全提供了科技支撑.

关键词: 长江河口, 盐水入侵, 东风西沙水库, 最长连续不宜取水天数, 数值计算

Abstract: An improved three dimension numerical model of saltwater intrusion in the Changjiang Estuary was applied to this numerical simulation. The model was validated with the salinity observed in 2007—2008 at the 10 hydrological sites, and the results showed that the model calculated salinity are well consistent with the observed ones. We considered the extremely drought year 1978—1979 as a hydrological calculation year, adopted the observed topography in 2008, and considered the effects of tide, wind stress and mixing in the model. The measured daily river discharge at the Datong station was modified by the Three Gorges Project, the eastern water diversion project from the South to the North, and the water intake and drain along the river. The conclusion is that the longest continuous days unsuitable for water intake in the Dongfengxisha reservoir are 26 days. This important parameter has been adopted in the build of the reservoir, providing scientific and technological support for the construct of ecological Chongming island and the ensure of freshwater resource safety.

Key words: Changjiang Estuary, saltwater intrusion, Dongfengxisha reservoir, the longest continuous days unsuitable for water intake, numerical calculation

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