王港河口污染物排海扩散规律——以氨氮扩散为例
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摘要
沿海地区污染物排放对近海水环境影响较大。通过建立平面二维水动力模型和污染物扩散模型,以江苏沿岸主要污染物氨氮为例,对王港河口地区水动力条件和污染物扩散进行了模拟。模拟结果显示,在污染物排放点水深小于10 m时,涨潮时排放污染物的扩散、稀释作用较落潮时排放更明显; 10 m水深以上排放点可以不考虑涨落潮影响。受大丰港等沿岸建筑物的影响屏蔽作用,1 m水深位置涨潮时排污污染物滞留最明显;随着排污位置水深增加,污染物扩散效果明显;在水深10 m位置扩散作用有明显增强。模拟得出在考虑污染物影响范围的条件下,排污位置点选择10 m附近较合理。
Coastal pollutant discharge has great influence on near sea water environment. Through the establishment of two-dimensional hydrodynamic model and pollutant diffusion model,take Jiangsu coast's main pollutants of ammonia for example,the Wang-gang estuary area hydrodynamic condition and pollutant diffusion was simulated.The simulation results show that when the water depth of pollutant discharge point is less than 10 m,the diffusion and dilution of pollutants at high tide are more obvious than when the ebb tide. The pollutant discharge point above10 m depth can ignore the influence of fluctuation tide. Affected by the shielding effect of dafeng port,the pollutant emission was most obvious when the water depth of pollutant discharge point is 1 m at high tide. With the increase of the depth at the discharge location,the pollutant diffusion effect is obvious,and the diffusion effect at the depth of 10 m is obviously enhanced. The simulation results show that it is reasonable to choose the location near 10 m when considering the influence range of pollutants.
Coastal pollutant discharge has great influence on near sea water environment. Through the establishment of two-dimensional hydrodynamic model and pollutant diffusion model,take Jiangsu coast's main pollutants of ammonia for example,the Wang-gang estuary area hydrodynamic condition and pollutant diffusion was simulated.The simulation results show that when the water depth of pollutant discharge point is less than 10 m,the diffusion and dilution of pollutants at high tide are more obvious than when the ebb tide. The pollutant discharge point above10 m depth can ignore the influence of fluctuation tide. Affected by the shielding effect of dafeng port,the pollutant emission was most obvious when the water depth of pollutant discharge point is 1 m at high tide. With the increase of the depth at the discharge location,the pollutant diffusion effect is obvious,and the diffusion effect at the depth of 10 m is obviously enhanced. The simulation results show that it is reasonable to choose the location near 10 m when considering the influence range of pollutants.
引文
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3 Liu S,Lou S,Kuang C,et al.Water quality assessment by pollutionindex method in the coastal waters of Hebei Province in western Bohai Sea,China[J].Marine Pollution Bulletin,2011,10(62):2220-2229
4 Yan H,Wang N,Yu T,et al.Hydrodynamic behavior and the effects of water pollution from Dalian's Large-Scale Offshore Airport Island in Jinzhou Bay,China[J].Journal of Waterway,Port,Coastal,and Ocean Engineering,2015,141(1):05014003
5张长宽.江苏省近海海洋环境资源基本现状[M].北京:海洋出版社,2013Zhang Changkuan.Basic status of offshore marine environmental resources in jiangsu province[M].Beijing:Ocean Press,2013
6陶建峰,张长宽.黄海辐射沙脊群海域水环境数值模拟研究[J].河海大学学报(自然科学版),2005(4):472-475Tao Jianfeng,Zhang Changkuan.Numerical simulation study of water environment in the yellow sea radiating sand ridges[J].Journal of Hohai University(Nature Science Edition),2005(4):472-475
7梁书秀,沈永明,孙昭晨,等.潮汐水域中污水侧向排放的数值模拟[J].海洋学报(中文版),2000,22(2):113-119Liang Shuxiu,Shen Yongming,Sun Zhaochen,et al.Numerical simulation of lateral sewage discharge in tidal waters[J].Journal of O-ceanography(Chinese Version),2000,22(2):113-119
8 Wang Y,Xin L.Analysis of pollutants of Sewage of oceanic outfall on the water quality[J].Energy Procedia,2012,16:1009-1013
9周智鹏,陶建峰,张长宽,等.南黄海辐射沙脊群西洋水道污水输移扩散研究[J].海洋通报,2015(1):65-71Zhou Zhipeng,Tao Jianfeng,Zhang Changkuan,et al.Study on sewage transport and diffusion in western watercourses of the radiated sand ridge group in the south yellow sea[J].Ocean Bulletin,2015(1):65-71
10蔡惠文,孙英兰,张越美,等.宁波-舟山海域污染物扩散的数值模拟[J].中国海洋大学学报(自然科学版),2006(6):975-980Cai Hhuiwen,Sun Yinglan,Zhang Yuemei,et al.Numerical simulation of pollutant diffusion in the ningbo-zhoushan sea area[J].Journal of Ocean University of China(Nature Science Edition),2006(6):975-980
11曹帅.长江口污染物输移扩散影响因素的数值模拟研究[J].中国水运(下半月),2015,15(6):47-50Cao Shuai.Numerical simulation study on influencing factors of pollutant transport and diffusion in changjiang estuary[J].China Water Transport(Second Half of the Month),2015,15(6):47-50
12匡翠萍,胡成飞,冒小丹,等.秦皇岛海域洪季水动力及污染物扩散数值模拟[J].同济大学学报(自然科学版),2015(9):1355-1360Kuang Cuiping,Hu Chengfei,Mao Xiaodan,et al.Numerical simulation of water dynamics and pollutant diffusion in the qinhuangdao sea during the flood season[J].Journal of Tongji University(Nature Science Edition),2015(9):1355-1360
13单铎.北运河氨氮降解系数测算研究[D].北京:首都师范大学,2013Shan Duo.Determination of ammonia-nitrogen degradation coefficient in the north canal[D].Beijing:Capital Normal University,2013