摘要
建立非恒定水流数学模型模拟长江泰州段潮流特性,在此基础上采用非稳态二维水质模型预测硫酸泄漏入江氢离子输移扩散过程。预测结果表明,硫酸泄漏事故发生于涨潮开始时对上游影响最大,发生于落潮开始时对下游影响最大,酸性污染带(pH值超标)最大影响范围为码头上游2000 m至下游8960 m。探索模拟硫酸泄漏后形成的酸性污染带的动态迁移过程,为潮汐水域酸性物质的水环境影响预测评价提供了技术支持。
A mathematical model for unsteady flow was established to simulate flow details in the Taizhou reach of Yangtze River. A two-dimensional unsteady water quality model coupled with a flow model was applied to predict the diffusion and transportation of H~ in a vitriol leakage accident. The result shows that the accident that occurred during flood tide starting time had maximal influence on the water quality upstream of the wharf and vice versa. The maximal area of the acidic polluted zone （pH 〈 6） in the tide period was 2000 m upstream to 8960 m downstream of the wharf. The model was made to estimate the impact of the flood and ebb on diffusion and transportation of the acidic polluted zone due to the vitriol leakage accident. This provides the technical support for risk assessment of acidic matter leakage accidents in tide water.
出处
《水资源保护》
CAS
2009年第3期76-79,共4页
Water Resources Protection
基金
国家重点基础研究发展计划(973)项目(2008CB418202)
关键词
码头
风险评价
硫酸泄漏
水流数学模型
输移扩散
长江下游
wharf
risk assessment
vitriol leakage
hydrodynamic mathematical model
diffusion and transportation
downriver reach of Yangtze River
