【摘要】：沙灘資源己經(jīng)成為世界各國(guó)重要的經(jīng)濟(jì)收入來(lái)源和自然資源財(cái)富。沙質(zhì)海岸一般存在岸灘侵蝕問題,無(wú)論是天然沙灘還是人工沙灘。人工養(yǎng)灘是維持岸灘穩(wěn)定的一個(gè)重要措施。海灘養(yǎng)護(hù)剖面設(shè)計(jì)的合理性直接影響?zhàn)B護(hù)后岸灘與當(dāng)?shù)厮畡?dòng)力環(huán)境的適應(yīng)能力,從水動(dòng)力角度分析影響海灘演變的設(shè)計(jì)因素是保證人工海灘穩(wěn)定性的首要條件。本文介紹了人工養(yǎng)灘工程在國(guó)內(nèi)外的開展情況,海灘平衡剖面理論研究進(jìn)展,以及對(duì)岸灘剖面演變的數(shù)值模型應(yīng)用進(jìn)展。介紹岸灘剖面演變的數(shù)值模型XBeach模型的理論基礎(chǔ),包括波浪模型、泥沙模型及地形演變模型等。對(duì)Roelvink和Stive實(shí)驗(yàn)和CROSSTEX實(shí)驗(yàn)用XBeach模型進(jìn)行驗(yàn)證并分析橫向輸沙機(jī)制。對(duì)廈門海壇灣沙灘的沖淤環(huán)境和水動(dòng)力特征做具體了解,提出對(duì)該沙灘的補(bǔ)灘剖面設(shè)計(jì)方案,應(yīng)用Xbeach模型,對(duì)不同補(bǔ)灘剖面穩(wěn)定性進(jìn)行數(shù)值模擬分析。利用岸灘演變模型討論補(bǔ)沙的粒徑、灘肩的高程、灘肩的寬度等因素對(duì)岸灘穩(wěn)定性的影響,為合理確定剖面設(shè)計(jì)參數(shù)提供技術(shù)支持。將二維模型提取剖面和一維模型做對(duì)比,結(jié)果吻合,說(shuō)明短期內(nèi)沿岸輸沙可忽略。
[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.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：P748

【參考文獻(xiàn)】

相關(guān)期刊論文 前6條

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本文編號(hào)：2313037