| 摘要: |
| 基于MIKE FLOOD建立秦皇岛入海河流及其近岸海域一维、二维耦合河流-海岸水动力和水质模型, 研究了秦皇岛海域和入海河流的水动力和污染物分布规律。结果表明: (1)海域潮流为半日潮, 其中石河口南北支入海口流速变化过程差别较大, 但水位变化过程基本一致; (2)整体上河流入海口化学需氧量(COD)与流速呈正相关关系; (3)COD在近岸海域的扩散方向与涨落潮潮流方向一致, 各入海河口海域落潮流期间的COD 高于涨潮流。如上结论为赤潮爆发机理和应急处置研究提供科学依据和技术支持。 |
| 关键词: 秦皇岛 一二维耦合模型 水动力 化学需氧量(COD) |
| DOI：10.11759/hykx20160815001 |
| 分类号: |
| 基金项目:海洋公益性行业科研专项(201305003-5) |
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| Coupling simulation and analysis of hydrodynamics and water quality in Qinhuangdao rivers and coastal waters |
|
GU Jie,HU Cheng-fei,LI Zheng-yao,KUANG Cui-ping,ZHANG Yong-feng
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| Abstract: |
| By coupling a one-dimensional model of river with a two-dimensional model for coastal waters in Qinhuangdao, a model of hydrodynamics and water quality was established based on the MIKE FLOOD. The characteristics of flow currents and distribution of pollutants in Qinhuangdao estuaries and coastal waters were subsequently analyzed. Numerical results show that 1) the tidal current in coastal water is semidiurnal, and although there is considerable change in the current speeds of the north and south branches of the Shihe River estuary, the water level is basically the same. 2) There is a positive correlation between chemical oxygen demand (COD) concentrations and current speeds in Qinhuangdao estuaries. 3) The direction of COD transport in coastal waters corresponds to the direction of the tidal current, and the COD concentration is higher in the ebb period than that in the flood period. The above results provide a scientific basis and technical support for research into the red-tide outbreak mechanism and emergency treatment thereof. |
| Key words: Qinhuangdao one- and two-dimensional coupled model hydrodynamics chemical oxygen demand |
