文献类型：期刊文献

中文题名：流沙湾海域潮汐潮流的三维数值模拟和海域环境容量研究

英文题名：Three-dimensional numerical simulation of tide and tidal currents in Liusha Bay and the study on its sea environmental capacity

作者：张静[1];刘玉[2];马志华[3];孙省利[4]

机构：[1]广东海洋大学水产学院,广东湛江524025;[2]天津科技大学海洋科学与工程学院,天津300457;[3]国家海洋信息中心,天津300171;[4]广东海洋大学海洋资源与环境监测中心,广东湛江524025

年份：2013

卷号：32

期号：1

起止页码：34

中文期刊名：海洋通报

外文期刊名：Marine Science Bulletin

收录：CSTPCD、、北大核心2011、CSCD_E2013_2014、北大核心、CSCD

基金：海洋公益性行业科研专项(200905005-05;201105008-E);广东省自主创新重大科技专项(2007A032600004)

语种：中文

中文关键词：流沙湾;POM模型;干湿网格;坐标变换;环境容量

外文关键词：Liusha Bay; POM model ; a wetting and drying scheme ; coordinate transformation; environmental capacity

中文摘要：将改进的干湿网格技术引入到POM模型中,通过坐标变换,合理安排计算区域,对流沙湾海域的三维潮流场进行了数值模拟。模拟结果与实测数据吻合较好。模拟结果表明:流沙湾海域属正规日潮,潮流运动是带有旋转流的往复流运动;涨潮历时大于落潮历时;落潮流速大于涨潮流速;余流较强,基本指向外港。采用垂向平均的水平二维对流扩散方程来模拟流沙湾污染物的浓度变化。结果表明:在Ⅱ类国家海水水质标准的要求下,流沙湾COD的环境容量约为906吨/年,交换率为78%;无机氮约为105吨/年,交换率为97%;活性磷酸盐约为11吨/年,交换率为97%。整个流沙湾海域水环境质量很好,海水自净能力强,对各种污染物的交换能力强。结合水质、水动力和容量计算结果,可以认为流沙湾海域水质属较贫营养类型,虽然较大的剩余环境容量是我们所希望的,然而结合具体养殖对象看,流沙湾海域低含量的氮、磷营养盐反而在一定程度上制约了流沙湾养殖业的健康发展。因此,环境管理不仅要考虑环境容量,还应结合具体海域使用特点进行合理规划,以促进海域生态健康发展。

外文摘要：Through a coordinate transformation and a reasonable arrangement for the calculation area, a three-dimensional numerical simulation of tide and tidal currents in Liusha Bay was done by using the POM model coupling with an improved wetting and drying scheme. The computed results agreed well with the observed ones. The results showed that： the tide of Liusha Bay was a normal diurnal, the tide movement was reciprocating with a rotating flow, the time of flood was longer than that of ebb and the ebb velocity was greater than that of the flood, and the residual currents were strong and in the direction towards the outer bay. At the same time, a vertical averaged, two-dimensional convection-diffusion equation was used to simulate the changes of the pollutant concentrationss. The environmental capacity results showed that under the condition of the national water quality standard of class 11, the environmental capacity and the exchange rate were about 906 t/a and 78 % respectively for COD; 105 t/a and 97 % for DIN; 11 t/a and 97 % for PO4-P. The water quality was fine, and the water self- purification was so strong that the exchange capabilities for various pollutants were larger. Taking consideration of water quality, hydrodynamic condition and capacity results, it can he concluded that the water quality in Liusha Bay is oligotrophic. Considering the breeding objects, the low level of nitrogen and phosphorus in Liusha Bay may restrict the healthy development of cultivation industry in a certain extent although the larger environmental capacity is what we hope. Therefore, the environment management should consider both the capacity and the specific features of sea area which can promote the healthy development of sea ecology.