人工养滩平衡剖面及其演变的数值模拟
发布时间：2018-11-05 18:51
【摘要】：沙滩资源己经成为世界各国重要的经济收入来源和自然资源财富。沙质海岸一般存在岸滩侵蚀问题,无论是天然沙滩还是人工沙滩。人工养滩是维持岸滩稳定的一个重要措施。海滩养护剖面设计的合理性直接影响养护后岸滩与当地水动力环境的适应能力,从水动力角度分析影响海滩演变的设计因素是保证人工海滩稳定性的首要条件。本文介绍了人工养滩工程在国内外的开展情况,海滩平衡剖面理论研究进展,以及对岸滩剖面演变的数值模型应用进展。介绍岸滩剖面演变的数值模型XBeach模型的理论基础,包括波浪模型、泥沙模型及地形演变模型等。对Roelvink和Stive实验和CROSSTEX实验用XBeach模型进行验证并分析横向输沙机制。对厦门海坛湾沙滩的冲淤环境和水动力特征做具体了解,提出对该沙滩的补滩剖面设计方案,应用Xbeach模型,对不同补滩剖面稳定性进行数值模拟分析。利用岸滩演变模型讨论补沙的粒径、滩肩的高程、滩肩的宽度等因素对岸滩稳定性的影响,为合理确定剖面设计参数提供技术支持。将二维模型提取剖面和一维模型做对比,结果吻合,说明短期内沿岸输沙可忽略。
[Abstract]:Beach resources have become an important source of economic income and natural resources wealth around the world. Sand coast generally exists shoal erosion problem, whether natural beach or artificial beach. Artificial beach maintenance is an important measure to maintain the stability of shoreline. The rationality of beach conservation profile design directly affects the adaptability of beach to local hydrodynamic environment after conservation. The design factors affecting beach evolution from the point of view of hydrodynamics are the primary conditions to ensure the stability of artificial beaches. This paper introduces the development of artificial beach maintenance project at home and abroad, the research progress of beach equilibrium section theory, and the application of numerical model to beach profile evolution. This paper introduces the theoretical basis of the numerical model XBeach model of shoreline profile evolution, including wave model, sediment model and topographic evolution model. Roelvink and Stive experiments and CROSSTEX experiments were verified by XBeach model and the mechanism of lateral sediment transport was analyzed. In this paper, the environment and hydrodynamic characteristics of the beach in Haitan Bay, Xiamen, are studied in detail. The design scheme of the beach filling section is put forward, and the stability of different beach section is simulated and analyzed by using Xbeach model. The effects of sand diameter, height of beach shoulder and width of beach shoulder on beach stability are discussed by using shoreline evolution model, which provides technical support for reasonable determination of profile design parameters. The comparison between the two dimensional model and the one dimensional model shows that sediment transport along the coast can be neglected in a short period of time.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P748
[Abstract]:Beach resources have become an important source of economic income and natural resources wealth around the world. Sand coast generally exists shoal erosion problem, whether natural beach or artificial beach. Artificial beach maintenance is an important measure to maintain the stability of shoreline. The rationality of beach conservation profile design directly affects the adaptability of beach to local hydrodynamic environment after conservation. The design factors affecting beach evolution from the point of view of hydrodynamics are the primary conditions to ensure the stability of artificial beaches. This paper introduces the development of artificial beach maintenance project at home and abroad, the research progress of beach equilibrium section theory, and the application of numerical model to beach profile evolution. This paper introduces the theoretical basis of the numerical model XBeach model of shoreline profile evolution, including wave model, sediment model and topographic evolution model. Roelvink and Stive experiments and CROSSTEX experiments were verified by XBeach model and the mechanism of lateral sediment transport was analyzed. In this paper, the environment and hydrodynamic characteristics of the beach in Haitan Bay, Xiamen, are studied in detail. The design scheme of the beach filling section is put forward, and the stability of different beach section is simulated and analyzed by using Xbeach model. The effects of sand diameter, height of beach shoulder and width of beach shoulder on beach stability are discussed by using shoreline evolution model, which provides technical support for reasonable determination of profile design parameters. The comparison between the two dimensional model and the one dimensional model shows that sediment transport along the coast can be neglected in a short period of time.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P748
【参考文献】
相关期刊论文 前6条
1 庄振业;曹立华;李兵;高伟;;我国海滩养护现状[J];海洋地质与第四纪地质;2011年03期
2 李志强;陈子q，
本文编号：2313037
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