Water renewal timescales in an ecological reconstructed lagoon in China
Water renewal timescales in an ecological reconstructed lagoon in China
复制标题
中国生态重建泻湖水体更新时间尺度
DOI：
10.2166/hydro.2013.136
复制
发表时间：
2013-01-01
影响因子：
2.7
通讯作者：
Zhang, Chen
中科院分区：
文献类型：
--
作者：
Gao, Xueping;Chen, Yuanyuan;Zhang, Chen
为了改善水质，建设中国景观泻湖，提出了七里海泻湖（河北昌黎县）生态重建规划。三维数值模型（EFDC）以停留时间、暴露时间和连通性为时间尺度，研究重建泻湖的水更新能力。还研究了风和泻湖潮汐入口深度对水更新能力的影响。结果表明，泻湖内的输送和扩散过程受到风和潮汐入口改变的强烈影响。无风条件下的泻湖表现出较低的水更新能力，特别是在末端区域（暴露时间为700-1,000天）。风作用显着增强了泻湖水体更新能力，全区暴露时间均低于400天。泻湖水更新的最佳入口深度预计为 4.0 m。连接矩阵确定了域中的哪些区域在不同条件下受污染源的影响最大。这项研究研究了重建泻湖中的传输和扩散过程，这可以为生态重建规划提供信息。
To improve water quality and construct a landscape lagoon in China, an ecological reconstruction plan for the Qilihai Lagoon (Changli County, Hebei) is proposed. A three-dimensional numerical model (EFDC) was used to study the water renewal capacity in the reconstructed lagoon by using residence time, exposure time and connectivity as timescales. The influences of wind and the depth of the tidal inlet of the lagoon on water renewal capacity were also investigated. The results show that the transport and diffusion processes in the lagoon were strongly influenced by wind and the modification of the tidal inlet. The lagoon under a no wind condition exhibited a low water renewal capacity, especially at the end areas (exposure time, 700–1,000 days). The wind action notably enhanced the water renewal capacity in the lagoon, and the exposure times were all lower than 400 days in the whole region. The optimal inlet depth for the water renewal in the lagoon was predicted to be 4.0 m. The connectivity matrices identified which areas of the domain would be most affected by a pollution source under different conditions. This study examines transport and diffusion processes in a reconstructed lagoon, which could be informative for ecological reconstruction planning.