基于水交换关联矩阵的天津近海水交换特性研究
Journal: Hydropower and Water Resources DOI: 10.32629/hwr.v4i1.2726
Abstract
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。
Keywords
水交换；关联矩阵；天津近海；数值模拟
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