基于水交换关联矩阵的天津近海水交换特性研究  

Research on the water exchange of Tianjin near shore based on Water Relation Matrix

作　　者：张伟[1,2] 张云霞[1] Zhang Wei;ZhangYunxia(Tianjin Municipal Engineering Design and Research Institute;School of Mechanical Engineering,Tianjin University)

机构地区：[1]天津市市政工程设计研究院 [2]天津大学机械工程学院

出　　处：《水电水利》2020年第1期164-170,共7页Hydropower and Water Resources

摘　　要：水交换关联矩阵是通过计算特定时段内海域各分区水体相互贡献的权重,从而描述大型海湾水交换的一个重要工具。本文将渤海湾天津近海和其邻近的海域分成九个海区,建立了水交换关联矩阵,模拟了不同季节风场作用下的水体交换状况。结果表明:天津近岸海域的水体在天津港北部和南部形成两个相对独立的环流体系。从天津港以北入海的污染物对渤海湾中北部区域的影响较大,而临港产业区以南入海的污染物,会迅速影响渤海湾中南部区域。从天津港和临港产业区之间入海的污染物由于处于上下两个环流体系之间,影响范围甚广,此区域污染物会迁移扩散至渤海湾南北各部分区域。总体上看,区域水体交换速率呈现冬季>春秋季>夏季的特征,且南部尤为明显。故此,在优化排污布局方案时,应充分考虑南北区域各自的水动力特性,结合海区功能规划及季节性的水交换特征,分别制定有针对的削减计划。Water Relation Matrix is defined as an important measure which describes the water exchange for the sea bay by calculating the weight of each partition sea water contribution to each other.In this paper,a 9-areas Water Relation Matrix is set up to simulate Tianjin near shore sea area water exchange conditions,and the effects of seasonal variation wind is taken into consideration.The results show that two independent circulations systems are found in north and south sea around the Tianjin port.The sewage that discharged in the north of Tianjin port will make a great influence on the north central area of Bohai Bay,as discharged in the south of industrial area near port may produce an quickly effect on the southern Bohai Bay.The sewage discharged between Tianjin port and industrial area near port among the two circulations has a widely effects,which will move and diffuse to all the regions of Bohai Bay.Water exchange rate presents a seasonal characteristic that much faster in winter than it in spring and autumn,and relatively slow in summer.We must make the reduce discharge plan fairly and reasonably to the seasonal and spatial variable water exchange condition and the management and function planning for different sea area.

关 键 词：水交换 关联矩阵 天津近海 数值模拟 

分 类 号：F55[经济管理—产业经济]