生态修复后普兰店湾水体交换数值研究  

Numerical simulation of water exchange changes in Pulandian bay after ecological restoration

作　　者：王平[1,2] 孙家文 董祥科[1,2] 方海超 张子鹏 尹晶[1,2] WANG Ping;SUN Jia-wen;DONG Xiang-ke;FANG Hai-chao;ZHANG Zi-peng;YING Jin(National Marine Environmental Monitoring Center,Dalian 116023,China;State Environmental Protection Key Laboratory of Marine Ecosystem Restoration,Dalian 116023,China)

机构地区：[1]国家海洋环境监测中心,辽宁大连116023 [2]国家环境保护海洋生态环境整治修复重点实验室,辽宁大连116023

出　　处：《海洋环境科学》2021年第6期937-946,共10页Marine Environmental Science

基　　金：国家自然科学基金项目(51709054,51809053);国家重点研发计划专项(2019YFC1407705)。

摘　　要：本文基于非结构化数值模型研究了普兰店湾的水动力特征,耦合输移扩散模型研究不同修复方案对水交换的影响。模拟得到:普兰店湾内涨落潮流向与岸线走向一致,池梗拆除增加15%的水域面积,提升了10%的海湾纳潮量。方案一工程后池梗高程较低,滩涂漫滩及干出流场较为均匀;方案二工程后池梗相对较高,池梗之间流速较大,滩涂流场较为杂乱。工程前湾中水体半交换时间为0-70天左右,湾底区域在70天以上,方案一工程实施后,湾中半交换时间降至50天,方案二降至60天;工程前湾内平均半交换时间为36.8天,方案一下降至24.0天,方案二降至28.5天,方案一较方案二提升12%,对湾内水质改善更为明显。The hydrodynamic characteristics of Pulandian bay was studied based on the unstructured numerical model, the influence of different removal elevation of pool stem on water exchange was studied coupling the transport and diffusion model. The result showed: the direction of fluctuations in Pulandian bay was basically the same as that of the shoreline, after the pool stem was removed, the water area would increase by 15% and bay tidal volume would increase by 10%. When the elevation of pool stem was low in plan 1, the flood and dryout flow was more uniform on intertidal zone;when the pool stem remained too high in plan 2, the flow velocity between the pool stems were large, and the tidal current field was chaotic. Before the project, the water half-exchange time of water in the bay gradually increased from 0 d to 70 d, and above 70 d at the bottom. After the project, the maximum half-exchange time in the bay of plan 1 was reduced to 50 d, and reduced to 60 d in plan 2. The average half-exchange time in the bay was 36.8 days, which dropped to 24.0 days after the implementation of plan 1, and 28.5 days for plan 2, the water quality improvement of plan 1 is 12% higher than plan 2.

关 键 词：普兰店湾 生态修复 水交换 数值模拟 

分 类 号：X143[环境科学与工程—环境科学]