本文選題：人工沙灘　切入點(diǎn)：經(jīng)驗(yàn)正交函數(shù)　出處：《海洋地質(zhì)與第四紀(jì)地質(zhì)》2016年06期 　論文類型：期刊論文

【摘要】：對(duì)濰坊人工沙灘二期工程竣工后海灘實(shí)測(cè)地形剖面進(jìn)行研究,應(yīng)用經(jīng)驗(yàn)正交函數(shù)(EOF)提取海灘2013年5月至2015年11月6次剖面監(jiān)測(cè)數(shù)據(jù)中的前3個(gè)模態(tài)的空間特征函數(shù)和時(shí)間特征函數(shù),分析竣工養(yǎng)護(hù)后海灘剖面的時(shí)空演變特征及海灘的平面變化特征。第一特征函數(shù)表示竣工后海灘的總體沖淤變化,受到東西兩側(cè)丁壩加長(zhǎng)和中間T型壩修建的影響,剖面的侵蝕程度較一期工程明顯減小;第二特征函數(shù)表示受地形和水動(dòng)力作用影響,前濱帶出現(xiàn)灘肩剖面和沙壩剖面的相互轉(zhuǎn)化;第三特征函數(shù)反映風(fēng)暴潮、人為因素等偶然因素的影響;從平面特征來(lái)看,人工沙灘中部、東部較西部侵蝕嚴(yán)重。可見(jiàn),二期工程建設(shè)起到了優(yōu)化的目的,大大改善了人工沙灘的侵蝕,但仍需要持續(xù)有規(guī)律的對(duì)海灘進(jìn)行監(jiān)測(cè),進(jìn)一步深化對(duì)人工養(yǎng)護(hù)沙灘建設(shè)和維護(hù)的認(rèn)識(shí)。
[Abstract]:After the completion of the second phase of Weifang artificial beach project, the topography profile of the beach is studied. The empirical orthogonal function (EOF) is used to extract the spatial and temporal eigenfunctions of the first three modes from May 2013 to November 6th 2015. This paper analyzes the temporal and spatial evolution characteristics of beach profile after completion of conservation and the characteristics of beach plane variation. The first characteristic function indicates that the overall erosion and siltation of the beach after completion is affected by the lengthening of spur dikes on both sides of the east and west sides and the construction of intermediate T type dams. The erosion degree of the section is obviously smaller than that of the first stage of the project, the second characteristic function indicates that the beach shoulder section and the sand dam section are transformed in the foreshore zone under the influence of topography and hydrodynamics, and the third characteristic function reflects the storm surge. From the point of view of the plane characteristics, the erosion of artificial sand beaches in the middle and east is more serious than that in the west. It can be seen that the second phase of the project has served the purpose of optimization and greatly improved the erosion of artificial beaches. But we still need to monitor the beach regularly and deepen the understanding of artificial conservation beach construction and maintenance.
【作者單位】： 國(guó)土資源部油氣資源和環(huán)境地質(zhì)重點(diǎn)實(shí)驗(yàn)室中國(guó)地質(zhì)調(diào)查局青島海洋地質(zhì)研究所;青島海洋科學(xué)與技術(shù)國(guó)家實(shí)驗(yàn)室海洋地質(zhì)過(guò)程與環(huán)境功能實(shí)驗(yàn)室;
【基金】：海洋地質(zhì)保障工程項(xiàng)目(GZH201200505,DD20160144) 國(guó)家自然科學(xué)基金項(xiàng)目(41106060)
【分類號(hào)】：P753

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