本文選題：水邊線方法 + 潮位校正　； 參考：《海洋科學(xué)進(jìn)展》2017年04期

【摘要】：針對(duì)河口泥沙島淤泥質(zhì)潮灘坡度和潮汐變化對(duì)水邊線的影響,提出一種利用兩期遙感水邊線模擬海島岸線及潮灘數(shù)字高程模型(Digtal Elevation Model,DEM)的方法,研究遼河口鴛鴦島的形成與演變過(guò)程。結(jié)合遙感影像、實(shí)測(cè)地形和潮位數(shù)據(jù)分析表明:1)模擬潮灘DEM與實(shí)測(cè)DEM之間的誤差集中在—40~55cm的范圍內(nèi),平均誤差14.24cm,表明遙感模擬作為一種手段對(duì)實(shí)測(cè)資料的欠缺是一種有效的補(bǔ)充。2)從20世紀(jì)80年代初至今,鴛鴦島的發(fā)育經(jīng)歷了萌生、生長(zhǎng)和動(dòng)態(tài)穩(wěn)定三個(gè)時(shí)期;入海徑流量的增加是鴛鴦島萌生的誘因,漲落潮流路分歧及其形成的緩流區(qū)促進(jìn)鴛鴦島的持續(xù)生長(zhǎng)。3)在鴛鴦島生長(zhǎng)過(guò)程中,南沙處在次生緩流區(qū)中,在相同時(shí)段內(nèi)其潮灘淤積量大于北沙;在鴛鴦島演變穩(wěn)定期,就岸線和面積變化而言,東北部潮灘侵蝕程度小于南部潮灘淤積程度,但從體積變化來(lái)看,東北部潮灘侵蝕量略大于南部潮灘淤積量。
[Abstract]:In view of the influence of muddy tidal flat slope and tidal variation on the water boundary line in estuarine and sediment island, a method of simulating island shoreline and tidal beach digital elevation model by using two-stage remote sensing water boundary line is proposed. The formation and evolution of mandarin duck island in Liaohe Estuary are studied. Combined with remote sensing image, the analysis of topographic and tidal level data shows that the error between simulated tidal flat DEM and measured DEM is concentrated in the range of -405cm. The average error is 14.24 cm, which indicates that remote sensing simulation is an effective supplement to the measured data as a means.) since the beginning of 1980s, the development of Mandarin duck island has experienced three periods: initiation, growth and dynamic stability. The increase of runoff into the sea is the inducement of the initiation of Yuanyang Island. The divergence of the fluctuating tidal current and the slow flow area promoted the sustained growth of Yuanyang Island. 3) during the growth process of Yuanyang Island, Nansha is in the secondary slow flow area. In the same period of time, the amount of tidal flat deposition is larger than that of northern sand, and in the stable period of Yuanyang Island evolution, the erosion degree of the northeast tidal flat is smaller than that of the southern tidal flat in terms of shoreline and area change, but from the perspective of volume change, The erosion amount of the northeast tidal flat is a little larger than that of the southern tidal flat.
【作者單位】： 華東師范大學(xué)河口海岸學(xué)國(guó)家重點(diǎn)實(shí)驗(yàn)室;國(guó)家海洋環(huán)境監(jiān)測(cè)中心;
【基金】：海洋公益性行業(yè)科研專項(xiàng)——典型海島生態(tài)脆弱性評(píng)估及綜合調(diào)控技術(shù)研究與示范(201505012)
【分類號(hào)】：P343.5;P731.2

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