水科学进展2017，Vol.28Issue(6)：908-921,14.DOI:10.14042/j.cnki.32.1309.2017.06.012
磨刀门河口环流与咸淡水混合层化机制
Estuarine circulation and mechanism of mixing and stratification in the Modaomen Estuary
摘要
Abstract
To study the characteristics of mixing and stratification in the Modaomen Estuary, a three-dimensional nu-merical salinity model was established based on SCHISM and then calibrated against measured data. Combined with the theory of the water potential difference, the temporal and spatial variation characteristics of mixing and stratification in the dry season and stratification mechanism of a deep channel and shoal were studied. The results show that water stratification is the strongest during the neap tide and is the weakest during the medium tide. Saltwater from the sandbar to Guadingjiao is always highly stratified. Along-channel advection, along-channel depth-mean straining and vertical mixing are the main factors that influence the water stratification of the deep channel. While cross-channel advection, cross-channel depth-mean straining and vertical mixing are the main factors that influence the water stratifi-cation of the shoal. In addition, there is a relatively high dissipation of turbulent kinetic energy (TKE) at the surface and bottom of the water column and low TKE dissipation at the middle of it. There is an asymmetric flood / ebb tidal distribution, with the flood higher than the ebb.关键词
混合与层化/势能异常/河口环流/湍动能耗散率/磨刀门河口Key words
mixing and stratification/potential energy anomaly/estuarine circulation/dissipation of turbulent kinetic energy/Modaomen Estuary分类
海洋科学引用本文复制引用
吕紫君,冯佳佳,郜新宇,汪玉平,张梦茹,孔俊..磨刀门河口环流与咸淡水混合层化机制[J].水科学进展,2017,28(6):908-921,14.基金项目
水利部公益性行业科研专项经费资助项目(201501010) （201501010）
江苏省第十三批六大人才高峰项目 (HYGC-004)The study is financially supported by the National Non-Profit Research Program of China(No. 201501010). （HYGC-004）
