| 摘要: |
| 利用耦合北斗和GPS双定位系统的拉格朗日随体法水质点追踪仪，在2018年9月至2019年10月期间开展了总数为18次的洪泽湖和巢湖主要河流河水入湖后表层、中层和底层水体运移同步追踪观测，研究了两个湖泊河水入湖后的运移轨迹和速度特征。结果表明：淮河主河道河水入洪泽湖后流向南北两侧；徐洪河河口处水体表层流速在洪泽湖5条河道出入湖口处为最大；巢湖双桥河河口处水体流速受巢湖闸运行影响强烈，各层流速在7条入湖河流中最大。洪泽湖、巢湖入湖水体流速由表层至底层逐渐降低，洪泽湖各层水体流速大于巢湖。洪泽湖河口处表层水体8次测量平均流速为6.11cm/s；巢湖为5.51cm/s；二者中层流速分别为5.32和3.85cm/s；底层则分别为4.96和3.67cm/s。 |
| 关键词: 拉格朗日 质点追踪 洪泽湖 巢湖 流速 |
| DOI：10.11693/hyhz20200200040 |
| 分类号:P343.3;TV131.2 |
| 基金项目:江苏省洪泽湖水利工程管理处委托项目，HZH-JG-GL-060-2019号；安徽省巢湖管理局委托项目，2017FFCZ4957号；国家自然科学基金项目，41701567号；中国科学院“一三五”重大突破项目，NIGLAS2018GH02号；国家水体污染控制与治理科技重大专项，2017ZX07603001号。 |
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| WATER PARTICLE TRACKING IN INFLOW WATER FOR HONGZE LAKE AND LAKE CHAOHU BASED ON LAGRANGIAN METHOD |
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PENG Zhao-Liang1, CHEN Chang-Ren2, WAN Jun2, WU Xiao-Bing2, ZHANG Yi-Hui1, HU Wei-Ping1, CUI Jian1
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1.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China;2.Hongze Lake Water Conservancy Project Management Office of Jiangsu Province, Huai'an 223100, China
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| Abstract: |
| The Beidou and GPS dual positioning system were used to observe the pathways, flowing velocity and direction at estuaries of Hongze Lake and Chaohu Lake in China, and water particle tracking was conducted based on the Lagrangian method. Observations were carried out in surface, middle, and bottom layers of tributaries in estuary for the two lakes during September 2018 to October 2019. Results suggest that the flowing direction of water at the main estuary of the Huaihe River turn to the north and south sides, while the water direction of the Xuhong River estuary are reciprocating, and the flowing velocity in the surface layer of the river was the largest amongst the five tributary rivers. The operation status of the Chaohu sluice had a strong influence on the direction and velocity of the Shuangqiao River to Chaohu Lake, and the velocity in each layer of the river was the largest among the seven tributary rivers. The flowing velocity in all estuaries of the two lakes gradually decreased from the surface layer to the bottom layer. The overall flow velocity of each layer of Hongze Lake was larger than that of Chaohu Lake. The average flowing velocity in eight observations and five estuaries for surface layer of Hongze Lake was 6.11cm/s and 5.51cm/s for Chaohu Lake. The flowing velocity of the middle layer was 5.32cm/s and 3.85cm/s, and of the bottom layer was 4.96cm/s and 3.67cm/s, respectively in Hongze Lake and Chaohu Lake. |
| Key words: Lagrange method particle tracking Hongze Lake Chaohu Lake flowing velocity |
