珠江三角洲陆源污染和香港水域排污对伶仃洋的影响  

Water quality variation in Lingding sea influenced by Pearl River delta and Hong Kong sea area

作　　者：逄勇[1] 李学灵 龙江 

机构地区：[1]河海大学环境科学与工程学院,江苏南京210098 [2]珠江流域水资源保护局,广东广州510611

出　　处：《水科学进展》2003年第5期558-562,共5页Advances in Water Science

基　　金：水利部重点课题(SZ9629)~~

摘　　要：采用河网区非稳态水量数学模型,计算珠江东四口门1985-1995年的入海水量(净泄流量);在此基础上,利用1985-1995年在珠江东四口门每年至少3次(丰、平、枯)的实测水质资料(CODMn、BOD5、无机氮、水溶性磷酸盐、石油类等),计算1985-1995年间每年丰、平、枯三季从东四口门下泄到伶仃洋的污染物总量。利用经率定、验证的伶仃洋近海区二维非稳态水量、水质数学模型对珠江三角洲陆源污染通过东四口门下泄的污染物量、陆源污染物以及香港水域排污对伶仃洋水域的影响进行了研究。An unsteady water quality and hydrodynamic model for river networks was employed in computing the amount of pollutants passing through the four east outlets in Pearl River delta into Lingding sea. The computed area is about 2000 square kilometers. Based on the verified model and the long series of the water quality data observed of 1985-1995 in the four east outlets, the amount of pollutants into Lingding sea are calculated and its variations are analyzed. The main conclusions are that the main pollution factors are COD and NH4+ and the main pollution outlet is Humen. The 2-D hydrodynamic and water quality model is used to calculate the water quality in Lingding sea area which is influenced by Pearl River delta and Hong Kong pollutant. The model is calibrated and verified with the real data. The main conclusion are as follows: (1) If the water quality in east outlets is satisfied with the desired function and the water quality in Lingding sea can not reach the desired function. (2) The pollutant discharged by Hong Kong only influence Shenzhen bay even though in unfavorable hydrological conditions. (3) The water quality is higher in northwest of Lingding sea because the along shore flow is toward northwest. (4) If the pollution accidently occur in east outlets, the influenced area is at middle area in Lingding sea.

关 键 词：陆源污染 水环境 污染物质 数学模型 水域排污 伶仃洋 珠江三角洲 香港 

分 类 号：X52[环境科学与工程—环境工程] X143