| 摘要: |
| 基于无结构网格的MIKE 3D模型，建立了长兴岛海域三维潮流水质数学模型.按照海洋功能区划的水质要求，综合分析离岸排放的特点，计算马家咀排污口的混合区面积及污染物浓度响应系数，进而对马家咀排污口近期和远期环境容量进行计算.结果表明，根据2012年海水水质现状，马家咀排污口近、远期混合区面积最大为0.046 5 km2，各主要污染因子化学需氧量（COD）、无机氮（DIN）、活性磷酸盐（PO3-4-P）和石油类的剩余环境容量分别为812.0、143.7、25.6、59.7 t/a. |
| 关键词: 海洋环境科学 海洋环境容量 混合区 浓度响应系数 离岸排放 |
| DOI：10.3969/J.ISSN.2095-4972.2017.02.007 |
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| 基金项目:大连理工大学海岸和近海工程国家重点实验室开放基金资助项目（LP1402，LP1501）；中国博士后科学基金面上资助项目（2015M581358）；国家海洋局近岸海域生态环境重点实验室开放基金资助项目（201309）；国家自然科学基金资助项目（41376120，51579030） |
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| Study on marine environmental capacity around sewage outfall in Majiazui of Changxingdao Island， Dalian |
| JIANG Heng-zhi,CUI Lei,YU Da-tao,GAO Fan,WU Li-guo |
| (School of Civil Engineering， Tianjin University， Tianjin 300072， China; National Marine Environmental Monitoring Center， Dalian 116023， China; State Key Laboratory of Coastal and Offshore Engineering， Dalian University of Technology， Dalian 116023， China) |
| Abstract: |
| A 3D tidal and water quality numerical model is established in Changxing Island area， based on unstructured MIKE 3D model. According to the seawater quality requirements of the marine functional zoning and general analysis on offshore discharge， the area of pollutant mixing zone and the concentration response coefficient are calculated. Besides， the marine environmental capacity is calculated in both short and long term. Results reveals that the maximum area of pollutant mixing zone is 0.046 5 km2 around Majiazui sewage outfall based on the water quality in 2012. The water environmental capacity of COD， DIN， active phosphate and oil are 812.0 t/a， 143.7 t/a， 25.6 t/a and 59.7 t/a， respectively． |
| Key words: marine environmental science marine environmental capacity mixing zone concentration response coefficient offshore discharge |
