| 黄河口近60年来潮流特征演化过程 |
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| 引用本文： | 白玉川,谢琦,徐海珏.黄河口近60年来潮流特征演化过程[J].海洋通报,2019,38(2):141-149. |
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| 作者姓名： | 白玉川 谢琦 徐海珏 |
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| 作者单位： | 天津大学水利工程仿真与安全国家重点实验室,天津,300072;天津大学水利工程仿真与安全国家重点实验室,天津,300072;天津大学水利工程仿真与安全国家重点实验室,天津,300072 |
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| 基金项目： | 河口海岸异重沙流成因机制与输移动态预测 （41576093） |
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| 摘 要： | 本文利用 1962 年、1986 年以及 2015 年的三个典型年代的实测资料建立黄河口数学模型，并对河口潮流场和潮流特征进行模拟，借用 MATLAB 软件进行分潮调和分析，得到黄河口近 60 年潮流特征以及各个阶段的潮流演化过程，得出以下结论：（1） 1962 年河口流场较为平整，有明显切变锋形态，该阶段存在两个较为明显的高流速区并且潮流在河口处呈现为往复流；（2） 1986 年黄河三角洲岸线曲折多拐，从湾湾沟到清水沟滋生了多个小型高流速区群，并且潮流在滨海处呈现往复流的形态而在远海处为旋转流； （3） 2015 年涨落潮时潮流在河口处形成明显的环流，此时在沿线凸出沙嘴处会形成 3 个明显的高流速区,并且潮流在大部分区域呈现旋转流而在河口东北向远海处部分区域呈现往复流的特征.
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| 关 键 词： | 黄河口 河口流场 高流速区 调和分析 潮流演变 |
| 收稿时间： | 2018/4/18 0:00:00 |
| 修稿时间： | 2018/7/5 0:00:00 |
The evolution process of tidal characteristics in the last 60 years of the Yellow River Estuary |
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| BAI Yu-chuan,XIE QI and XU Hai-jue.The evolution process of tidal characteristics in the last 60 years of the Yellow River Estuary[J].Marine Science Bulletin,2019,38(2):141-149. |
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| Authors: | BAI Yu-chuan XIE QI and XU Hai-jue |
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| Institution: | State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China,State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China and State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China |
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| Abstract: | This research utilizes the nautical charts of the year 1962, 1976 and 2015 to establish the mathematical model which is used to simulate the flow field in the last 60 years of the Yellow River Estuary. Then tidal harmonic analysis are derived with MATLAB, the tide ellipse figures are plotted. The conclusions of the present study are as follows: (1) In 1962, the flow field near the estuary which had apparent shear front was relatively smooth, and there were two high velocity zones in that period. The tide current appeared reversing currents near the estuary ; ( 2) The shoreline of the Yellow River delta appeared winding in 1986, which resulted in the large amount of small high velocity zones along the shoreline, and the current form was rotational flow in the open sea; (3) There was obvious circulation at the estuary in the year 2015 and there were three high velocity zones at the sand spits. The current was reversing flow at the most region of the area except the northeast part far from the estuary. |
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| Keywords: | Yellow River estuary flow field high velocity zone harmonic analysis tide current evolution |
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