摘要
为进一步认识珠江河口咸潮活动规律和提供调水压咸有关控制参数,本文分析枯季磨刀门水道的盐度监测资料,发现咸潮半月周期内存在入侵期和退落期,在咸潮入侵强烈时上游河段一般的来流量(<4000m^3/s)难以保证取水要求,控制上游增加一定的来流量只有在咸潮退落期才具有压咸实际意义;用日最小盐度反映咸潮发展的不同阶段较有代表性,而日最低潮位是决定日最小盐度的主要因素。利用三灶站加权日最低潮位过程可初步判断咸潮入侵期与退落期,同时可利用该潮位过程曲线谷值所对应的时间预报控制上游加大流量的最佳时机起点。资料表明,这一方法比现有方法更符合实际。
In this paper, the saline monitoring data from water intake projects in Modaomen waterway during a dry season was used to take correlation analysis with synchronous tide and runoff process. It is found that in half month period there is a saline intrusion and retreat time. Upsteam flow less than 4000 m^3/s can not be able to ensure the water intake requirement in periods of intense saline intrusion. Man-made control to increase upstream runoff flow for water supply in the ary has practical significance just during the saline retreat time. The daily minimum salinity process seems to be a better representative guide line for the phases of saline intrusion and the daily lowest ebb tide mostly determines the daily minimum salinity. Thus, weighted daily lowest ebb tide curve of Sanzhao station will be utilized to preliminarily judge the saline intrusion and retreat periods and the curve vale point will be used to forecast the best starting point of upstream runoff increasing date. Data in practice shows this method is better than that in existance which deduces the flow control opportunity according to the spring tide days.
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
2008年第5期554-559,共6页
Chinese Journal of Hydrodynamics
关键词
磨刀门
盐度
咸潮
压成时间
Modaomen waterway
salinity
saline intrusion
extrusion opportunity
作者简介
尹小玲（1967-），女，湖北人，讲师，博士生．
