水科学进展Issue(2)：212-220,9.DOI:10�14042/j�cnki�32�1309�2015�02�008
钱塘江河口一维盐度动床预报模型及应用
1-D movable bed numerical forecast model of salinity of the Qiantang River estuarine reach and its application
摘要
Abstract
The Qiantang River estuary is an alluvial estuary with strong tidal bore, high sediment concentration and easy changeable riverbed. The interaction between tide and fluvial feedback has great effects on saltwater intrusion. In this paper, a 1⁃D numerical forecast model of salinity has been developed in the light of riverbed deformation, and the process of water flow, sediment transport, river bed deformation and salinity are fully coupled solved. The governing e⁃quations of the model are solved by an explicit finite⁃volume method with good conservation performance. The verifica⁃tion results show that the riverbed deformation has great influence on chlorine, and the chlorine computed by the mov⁃able⁃bed numerical model agrees well with the measured. Therefore, it is necessary to adopt the movable⁃bed numeri⁃cal model in long⁃duration salinity forecast. Finally, the model is used to investigate the response pattern of saltwater intrusion in the Qiantang River estuary to human activities, such as construction of Xin�anjiang⁃reservoir and the Qian⁃tang River estuary narrowing regulation. And the problem of the water supply guarantee rate of Hangzhou city is also discussed. The results show that Xin�anjiang⁃reservoir and the Qiantang River estuary regulation engineering have a significant effect on improving the estuarine freshwater resources and ensuring the safety of water supply of Hangzhou city. In order to raise the water supply guarantee rate to 95%, the measures of scheduling release water discharge from the upstream reservoir and building a new backup reservoir should be taken.关键词
盐度输移/动床预报模型/人类活动/供水保证率/钱塘江河口Key words
salinity transport/movable bed numerical forecast model/human activities/guarantee rate of water sup-ply/Qiantang River estuary分类
建筑与水利引用本文复制引用
史英标,李若华,姚凯华..钱塘江河口一维盐度动床预报模型及应用[J].水科学进展,2015,(2):212-220,9.基金项目
浙江省省属科研院所专项计划项目（2015F50010）；水利部公益性行业科研专项经费资助项目（201101056） The study is financially supported by the National Non-Profit Research Program of China （ No?201101056）． （）
