| 摘要: |
| 提要: 近十年来我国海岸带地区快速城市化,对土地的需求持续高涨,导致沿海地区围海造地现象愈演愈烈,海湾纳潮海域面积持续萎缩,对海湾的水交换带来了较大压力。为此,选取我国海岸带快速城市化的典型区域——渤海湾为例,研究近十年来渤海湾海岸带城市化对渤海湾水交换的影响。基于国际流行的MIKE3水动力模型耦合PT粒子追踪模块(Particle Tracking), 应用2000年和2010年两个典型年份的渤海湾岸线资料, 分别计算了2000年和2010年渤海湾环流系统及其驱动下的水质点运移规律及其变化特征。研究将渤海湾划分为8个区块, 定量化研究和对比了近十年来由于渤海湾持续围填海导致的海湾水存留时间和不同区块水交换能力的变化。结果表明, 随着近十年来渤海湾沿岸快速城市化导致的岸线变化, 导致湾内环流涡旋增多, 对湾内水交换起到决定性作用的流场结构发生了显著变化, 致使不同区块的水交换能力和平均水存留时间不仅存在较大差异, 而且发生了显著的变化。与2000年相比, 2010年天津港、黄骅港和曹妃甸港区海域的平均水存留时间明显增加, 水交换率下降, 对区域水质的改善十分不利。 |
| 关键词: 渤海湾, 水交换, 围填海, 城市化 |
| DOI：10.11693/hyhz20140700194 |
| 分类号: |
| 基金项目: |
|
| Fig.1 Region division of Bohai Bay in 2000(left) and 2010(right) |
|
wang yongzhi,wu di,shi honghua,zhao xiaolong and yan wenwen
|
|
The First Institute of Oceanography, SOA,The First Institute of Oceanography, SOA,The First Institute of Oceanography, SOA,The First Institute of Oceanography, SOA,The First Institute of Oceanography, SOA
|
| Abstract: |
| Coastal reclamation were increasing due to rapid urbanized coastal zone in China in recent ten years. It resulted in that tidal prism decreased continuously and brought large pressure on water exchange in Bays. In order tostudy the effect of coastal zone urbanizationon on water exchange in recent ten years, the Bohai Bay was taken for an example, which is a typical rapid urbanization coastal zone in China. The MIKE 3 hydrodynamic model coupled with particle tracing module was applied in Bohai Bay with 2000 and 2010 coastline data respectively.SBohai Bay was divided into eight parts. The changes of the averaged residence time, the water exchange patterns and water particles movement regulation in the different parts are provided quantitatively. It is shown that there were significant changes of current field instructures in Bohai Bay which plays a decisive role in water exchange due to coastlines changes with rapid coastal zone urbanization in recent ten years. It resulted in that there were not only great differences in water exchange and average residence time, but also remarkable changes had occurred. Therefore, the averaged residence time increased and water exchange rate decreased in Tianjun harbor area, Huanghua harbor area and Caofeidian harbor area in 2010, which were bad for regionalSwater quality improvement compared with in 2000. |
| Key words: Bohai Bay,SWater exchange, Reclamation,SUrbanization |