左常圣,王慧,李文善,黄清泽,张建立,刘秋林.海平面变化背景下三大河口咸潮入侵特征及变化浅析[J].海洋通报,2021,(1):
海平面变化背景下三大河口咸潮入侵特征及变化浅析
Characteristics and changes of salt-tide intrusion in three estuaries under the background of sea level change
投稿时间:2020-03-30  修订日期:2020-11-16
DOI:
中文关键词:  河口  海平面  风暴潮  咸潮入侵
英文关键词:estuary  sea level  storm surge  intrusion of tidal saltwater
基金项目:国家重点研发计划(2017YFA0604902)
作者单位E-mail
左常圣 国家海洋信息中心天津 300171 changshengzuo@126.com 
王慧 国家海洋信息中心天津 300171  
李文善 国家海洋信息中心天津 300171  
黄清泽 宁德海洋环境监测中心站福建 宁德 352000 1562097720@qq.com 
张建立 国家海洋信息中心天津 300171  
刘秋林 国家海洋信息中心天津 300171  
摘要点击次数: 193
全文下载次数: 134
中文摘要:
      基于 2009—2019 年实测资料分析研究我国三大河口咸潮入侵的特征及变化规律。研究结果表明:2009 年以来,珠江口每年都会受到咸潮入侵的威胁,2019 年咸潮入侵程度为近 8 年来最为严重的一年,全禄水厂超标时间超过 210 h;钱塘 江口除 2014 年外均发生较强咸潮入侵,其中 2019 年咸潮入侵程度为近 9 年最为严重的一年,南星水厂超标时间超过 550 h;长江口咸潮入侵程度整体呈下降趋势,2015 年后咸潮入侵次数明显减少,平均每年 < 3 次,主要原因为长江口北支倒灌影响,2019 年咸潮入侵程度为近 5 年最为严重的一年,青草沙水库超标时间超过 470 h。对河口咸潮入侵影响最大的因素为径流,其次是潮汐和海平面变化;受潮周期影响,咸潮入侵具有日变化和半月变化周期;受径流影响,咸潮入侵具有明显的季节变化和年际变化规律,我国三大河口咸潮入侵机制共性和差异性并存。海平面上升和风暴潮增水会加剧磨刀门咸潮入侵灾害,在高海平面期及风暴潮多发期需格外注意咸潮入侵灾害,做好预警应对。
英文摘要:
      Based on the measured data from 2009 to 2019, this paper analyzes the characteristics and variation of salt-tide intrusion in three estuaries in China.The results show that the Pearl River Estuary has been threatened by salt tide invasion every year since 2009, withthe most severeinvasionhappened in 2019, whenthe Quanlu water plant exceeded 210 hours. Except for 2014, strong salt tide invasion occurred in the Qiantang River. In 2019, the degree of salt tide invasion was the most serious, and the exceeding time of Nanxing Water Plant was 550 hours. Since 2015, the number of salt tide invasions in the Yangtze Estuary has been significantly reduced, with an average of less than three times a year. The main reason is backirrigation in the northern branch of the Yangtze Estuary. In 2019, the degree of salt tide invasions wasthe most severe in the past five years, with the Qingcaosha reservoir exceeding the standard for 470 hours. Runoff was the most important factor influencing the intrusion of saltwater in estuaries, followed by tidal and sea level changes. Under the influence of tidal cycle, salt tide invasion has diurnal variation and semilunar variation period of 15 days. Under the influence of runoff, the salinity tide invasion has obvious seasonal and interannual variation. Sea level rise and storm surge increase aggravate the salt tide invasion disaster. The common and different mechanisms of saltwater intrusion in the three estuaries coexist in China. In the period of high sea level and frequent storm surge, salt tide invasion disaster deserves special attention and early warning and response need to be made.
查看全文    下载PDF阅读器
关闭