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Shoreline Change Modeling on Emergency Beach Nourishment Project on West Beach of Beidaihe, China 总被引:3,自引:0,他引:3
By use of a shoreline-change numerical model (GENESIS) based on one-line theory, a preliminary modeling study on shoreline changes caused by a beach nourishment project in Beidaihe, China, is presented in this paper. Firstly, the GENESIS model is verified and model sensitivity to the major parameter changes is discussed by simulating a hydraulic model test. The beach nourishment project, after that the shoreline change is kept being monitored, is a small-scale emergency one carried out to use two bathing places on the west beach in the summer, 2008. In this paper the shoreline changes caused by the beach nourishment project are modeled by the GENESIS model, and the computed results fit well with the measured shorelines. With the same model and parameters, a long-term performance of the project is predicted, and the result shows that the bathing places only can be suitable for bathing in 2 to 3 years without subsequence nourishment project. Therefore, it is proposed to nourish the beaches in time to keep the service life of the beach in recent years and carry out the beach nourishment project for the whole west beach as soon as possible. 相似文献
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通过对北戴河西海滩养护前、养护初、3个月和一年后表层沉积物样品粒度实验,获得沉积物粒度参数,并结合Gao—ACollins粒径趋势模型,对海滩养护后沉积物粒度变化特征及其对养护海滩的影响进行了研究。结果显示经波浪等动力作用后,养护后的新海滩沉积物整体呈粗化、分选性变好趋势;海滩沉积物以推移质和跃移质为主;沉积物净运移趋势由离岸搬运为主变为沿岸搬运占优势;填沙物质特征对填沙区及其上、下游沉积物粒度特征有影响,但这种影响随时间推移逐渐减小;潜堤等硬工程设施对养护海滩的稳定具有积极作用。一年后,养护海滩保存良好,填沙物质的选择较合理。 相似文献
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秦皇岛是一座环境优美的滨海城市。她以北方不冻良港,万里长城山海关,避暑胜地北戴河、南戴河而闻名中外。然而,随着工业发展,这里一度大气和河流污染严重。渤海明珠会不会失去光泽呢?人们的焦虑引起了市政府的高度关注。 相似文献
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今年以来,秦皇岛市国土资源局北戴河区分局采取切实有效措施,加强政务信息报送工作力度,不断提高工作水平,上半年信息报送工作在全市系统名列前茅。 相似文献
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文章根据2008—2012年夏季北戴河赤潮监控区海水调查结果,应用单因子法、有机污染指数法和富营养化指数法,对该海域海水的质量状况进行了评价与分析,采用秩相关系数法对该海域5年的水质状况进行趋势分析。结果表明,北戴河近岸海域主要污染物含量均存在不同程度的超标,其中无机氮污染程度明显加重;该海域水质由良好和较好转变为开始受到有机污染,有机污染程度整体呈加重趋势;该海域富营养化水平由贫营养升至高富营养,富营养化水平呈逐年显著上升趋势,上升幅度逐渐加大。 相似文献
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