温州浅滩围垦工程对周围海域盐度分布和水质的影响
|
摘要
在收集春季瓯江口海域附近的入海污染源位置和污染源源强等数据资料的基础上,主要考虑海水中溶解态无机氮(DIN)、溶解态无机磷(DIP)和叶绿素a的含量,利用MIKE21模型,考虑水体斜压,对温州浅滩围垦工程前后周围海域水环境的水动力和水质进行了耦合数值模拟。研究结果表明:工程并不会大范围改变瓯江口海域的水动力特征,影响主要集中在河口附近,体现在北口区域的流速有所增加、南口区域近河口处流速有所减小;同时,围垦工程导致北口潮流加大、盐度值略有增加;工程实施后不会对周围海域水质造成大范围改变,但是对局部海域水质的确有一定的影响,近河口处海域的营养盐浓度和叶绿素a含量都呈现上升趋势,局部区域富营养化一定程度上有所加重。
Based on the collection data of position and concentration of pollution sources in spring,mainly considering the concentration level of DIN,DIP and chlorophyll-a,the current and water quality coupling numberical simulation was carried out.Taking into account baroclinic water,MIKE21 model was used before and after the Landmaking Project in the Oujiang Estuary. The result shows that the project would not cause great changes to the hydrodynamic characteristics in Wenzhou Bay, but it would increase the current speed in the north area and decrease the current speed in the south area near the estuary. The salt distribution in the north area changes obviously while the amount of salinity increases near the north part of the estuary.Generally,Phrase I and Phrase II projects would not cause large scale changes to the seawater quality around,but it does have a certain effect on the local seawater quality. Nutrients and chlorophyll-a near the mouth of the estuary showed a rising trend and the eutrophication was aggravated.
Based on the collection data of position and concentration of pollution sources in spring,mainly considering the concentration level of DIN,DIP and chlorophyll-a,the current and water quality coupling numberical simulation was carried out.Taking into account baroclinic water,MIKE21 model was used before and after the Landmaking Project in the Oujiang Estuary. The result shows that the project would not cause great changes to the hydrodynamic characteristics in Wenzhou Bay, but it would increase the current speed in the north area and decrease the current speed in the south area near the estuary. The salt distribution in the north area changes obviously while the amount of salinity increases near the north part of the estuary.Generally,Phrase I and Phrase II projects would not cause large scale changes to the seawater quality around,but it does have a certain effect on the local seawater quality. Nutrients and chlorophyll-a near the mouth of the estuary showed a rising trend and the eutrophication was aggravated.
引文
[1]李孟国,王正林.温州浅滩围涂工程的可行性研究[J].中国港湾建设,2001(5):30-33.
[2]李孟国,闫勇,麦苗,等.复杂河口汊道封堵后有关的潮流和泥沙问题[J].水利学报,2010,41(12):1 438-1 445.
[3]郑敬云.河口地区围涂开发的水环境动力特征研究[D].北京:清华大学,2010.
[4]王勇智,鲍献文,王曙光.我国海洋工程海洋环境影响后评价方法初探-以温州灵霓北堤工程海洋环境影响后评价为例[J].海洋环境科学,2010,29(1):139-144.
[5]陈雷,徐兆礼,姚炜民,等.瓯江口春季营养盐、浮游植物和浮游动物的分布[J].生态学报,2009,29(3):1 571-1 577.
[6]叶新荣,张荣保,许恒韬,等.瓯江口海域环境质量现状分析与评价[J].科技创新导报,2014(28):120-123.
[7]李佳.乐清湾DIN、DIP分布数值模拟及其对重大海岸工程的响应[D].杭州:浙江大学,2005.
[8]海洋图集编委会.渤海,黄海,东海海洋图集(水文)[M].北京:海洋出版社,1992.
[9]海洋图集编委会.渤海,黄海,东海海洋图集(化学)[M].北京:海洋出版社,1992.
[10]黄秀清,姚炎明,王金辉,等.乐清湾海洋环境容量及污染物总量控制研究[M].北京:海洋出版社,2011.
[11]张扬,陈青青,汪彬彬.温州市龙湾区内河水质现状调查研究[J].中国环境管理,2014(2):40-44.
[12]陈雷,徐兆礼,陈胜,等.2007年乐清湾富营养化空间特征及其成因分析[J].上海海洋大学学报,2010,19(1):91-97.
[13]单慧洁.温州近海建设工程环境影响潮汐潮流数值模拟[D].宁波:宁波大学,2014.
[2]李孟国,闫勇,麦苗,等.复杂河口汊道封堵后有关的潮流和泥沙问题[J].水利学报,2010,41(12):1 438-1 445.
[3]郑敬云.河口地区围涂开发的水环境动力特征研究[D].北京:清华大学,2010.
[4]王勇智,鲍献文,王曙光.我国海洋工程海洋环境影响后评价方法初探-以温州灵霓北堤工程海洋环境影响后评价为例[J].海洋环境科学,2010,29(1):139-144.
[5]陈雷,徐兆礼,姚炜民,等.瓯江口春季营养盐、浮游植物和浮游动物的分布[J].生态学报,2009,29(3):1 571-1 577.
[6]叶新荣,张荣保,许恒韬,等.瓯江口海域环境质量现状分析与评价[J].科技创新导报,2014(28):120-123.
[7]李佳.乐清湾DIN、DIP分布数值模拟及其对重大海岸工程的响应[D].杭州:浙江大学,2005.
[8]海洋图集编委会.渤海,黄海,东海海洋图集(水文)[M].北京:海洋出版社,1992.
[9]海洋图集编委会.渤海,黄海,东海海洋图集(化学)[M].北京:海洋出版社,1992.
[10]黄秀清,姚炎明,王金辉,等.乐清湾海洋环境容量及污染物总量控制研究[M].北京:海洋出版社,2011.
[11]张扬,陈青青,汪彬彬.温州市龙湾区内河水质现状调查研究[J].中国环境管理,2014(2):40-44.
[12]陈雷,徐兆礼,陈胜,等.2007年乐清湾富营养化空间特征及其成因分析[J].上海海洋大学学报,2010,19(1):91-97.
[13]单慧洁.温州近海建设工程环境影响潮汐潮流数值模拟[D].宁波:宁波大学,2014.