本文選題：海岸侵蝕 + 砂質(zhì)海岸　； 參考：《國家海洋局第一海洋研究所》2014年碩士論文

【摘要】：海岸帶是人類生活中密不可分的區(qū)域,海岸侵蝕在全球范圍內(nèi)的不斷加劇已引起人們的廣泛關(guān)注。我國約70%的沙質(zhì)海岸正在遭受侵蝕,廣西省作為我過11個沿海省份之一,其海岸侵蝕不斷加劇。廣西北海市潿洲島作為有居民海島,離岸較遠(yuǎn),其區(qū)域活動較為封閉。而海岸侵蝕對潿洲島的社會、環(huán)境和經(jīng)濟(jì)造成不可忽略的影響。本文依托海洋公益性行業(yè)科研專項“我國典型海島地質(zhì)災(zāi)害監(jiān)測及預(yù)警示范研究”項目,對潿洲島岸線進(jìn)行了全面的調(diào)查研究,主要包括:現(xiàn)場大面的踏勘走訪、遙感影像分析、剖面和岸線監(jiān)測、岸灘粒度變化分析等。在獲得準(zhǔn)確的實地資料的基礎(chǔ)上結(jié)合前人的經(jīng)驗和研究成果,分析了潿洲島岸線的侵蝕的現(xiàn)狀和特征及影響因素,并對研究區(qū)海岸侵蝕的防治提出了建議。研究表明,研究區(qū)的沙質(zhì)岸線整體處于侵蝕狀態(tài),而人工岸線增長速率較快。通過對2006-2013年布設(shè)在潿洲島的15條岸灘剖面4次重復(fù)測量和數(shù)據(jù)對比分析,得到研究區(qū)岸線長期和短期變化特征。岸灘剖面長期變化特征表明,潿洲島東部與西南部海岸侵蝕較為嚴(yán)重,西南部岸段年均下蝕可達(dá)0.18m;正北部岸灘海岸侵蝕程度相對較輕,南灣段海岸整體變化較小,呈現(xiàn)弱侵蝕-弱淤積變化。在短期強(qiáng)熱帶風(fēng)暴影響下,冬季至夏季岸灘下蝕明顯。基于以上研究對研究區(qū)的海岸侵蝕原因做出討論,認(rèn)為全球海平面上升、風(fēng)暴潮、人工采沙是潿洲島海岸侵蝕的主要原因。在分析了研究區(qū)侵蝕特征之后提出了相應(yīng)的發(fā)育措施,認(rèn)為修建人工防護(hù)堤和人工補(bǔ)沙是有效防治研究區(qū)海岸侵蝕的途徑。
[Abstract]:Coastal zone is an inseparable area of human life. The increasing of coastal erosion in the global scope has caused widespread concern. About 70% of the sandy coasts in China are being eroded. As one of the 11 coastal provinces in Guangxi Province, the coastal erosion is increasing. Weizhou Island, a inhabited island in Beihai City, Guangxi Province, is far offshore and its regional activities are relatively closed. However, coastal erosion can not be ignored in Weizhou Island's society, environment and economy. Relying on the special scientific research project of "Monitoring and early warning of geological hazards in typical islands in China", this paper has carried out a comprehensive investigation and study on the shoreline of Weizhou Island, mainly including: field survey and visit. Remote sensing image analysis, profile and shoreline monitoring, shoreline granularity analysis, etc. On the basis of obtaining accurate field data, combined with previous experience and research results, the present situation, characteristics and influencing factors of coastal erosion in Weizhou Island are analyzed, and suggestions for the prevention and control of coastal erosion in the study area are put forward. The results show that the sandy shoreline in the study area is in a state of erosion, while the artificial shoreline grows rapidly. Based on four repeated surveys and data analysis of 15 shoreline profiles in Weizhou Island from 2006 to 2013, the long-term and short-term variation characteristics of shoreline in the study area were obtained. The long-term variation characteristics of shoal profile show that the coastal erosion in the east and southwest of Weizhou Island is more serious, and the annual erosion in the southwestern part of Weizhou Island can reach 0.18m.The coastal erosion degree in the north of Weizhou Island is relatively light, and the overall change of the coast in the south bay section is relatively small. It shows weak erosion and weak siltation change. Under the influence of short term strong tropical storm, the beach erosion is obvious from winter to summer. Based on the above studies, the main causes of coastal erosion in Weizhou Island are considered as global sea level rise, storm surge and sand mining. After analyzing the erosion characteristics of the study area, the corresponding development measures are put forward. It is considered that the construction of artificial embankment and artificial recharge is the effective way to prevent and control coastal erosion in the study area.
【學(xué)位授予單位】：國家海洋局第一海洋研究所
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：P748

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本文編號：1821900