海洋科学
海洋科學
해양과학
Marine Sciences
2015年
9期
94-100
,共7页
射阳河口%海岸线%遥感%时空变化
射暘河口%海岸線%遙感%時空變化
사양하구%해안선%요감%시공변화
the Sheyang River Estuary%shoreline%remote sensing%spatial and temporal analysis
以射阳河口北部扁担港口和射阳河口南部斗龙港口之间的海岸作为研究区,基于1973,1987,2000和2013年四期Landsat影像提取了该岸段岸线,并进行了时空变化分析。结果表明,射阳河口以北的扁担港口—射阳河口岸段仍处于侵蚀状态,呈现侵蚀—淤积—缓慢侵蚀的变化格局,40 a间侵蚀面积为12.6 km2,淤积面积为1.0 km2；射阳河口以南的射阳河口—斗龙港口岸段处于淤积的态势,呈现淤积—快速淤积—缓慢淤积的格局,40 a间淤积的面积为223.1 km2,仅在2000~2013年间该岸段北部出现了侵蚀。结论是虽然射阳河口以南岸段仍总体处于淤积的过程中,但是近年来江苏海岸的侵蚀范围已经扩展到了射阳河口以南,这证明了江苏海岸侵蚀岸段有进一步扩大的趋势。
以射暘河口北部扁擔港口和射暘河口南部鬥龍港口之間的海岸作為研究區,基于1973,1987,2000和2013年四期Landsat影像提取瞭該岸段岸線,併進行瞭時空變化分析。結果錶明,射暘河口以北的扁擔港口—射暘河口岸段仍處于侵蝕狀態,呈現侵蝕—淤積—緩慢侵蝕的變化格跼,40 a間侵蝕麵積為12.6 km2,淤積麵積為1.0 km2；射暘河口以南的射暘河口—鬥龍港口岸段處于淤積的態勢,呈現淤積—快速淤積—緩慢淤積的格跼,40 a間淤積的麵積為223.1 km2,僅在2000~2013年間該岸段北部齣現瞭侵蝕。結論是雖然射暘河口以南岸段仍總體處于淤積的過程中,但是近年來江囌海岸的侵蝕範圍已經擴展到瞭射暘河口以南,這證明瞭江囌海岸侵蝕岸段有進一步擴大的趨勢。
이사양하구북부편담항구화사양하구남부두룡항구지간적해안작위연구구,기우1973,1987,2000화2013년사기Landsat영상제취료해안단안선,병진행료시공변화분석。결과표명,사양하구이북적편담항구—사양하구안단잉처우침식상태,정현침식—어적—완만침식적변화격국,40 a간침식면적위12.6 km2,어적면적위1.0 km2；사양하구이남적사양하구—두룡항구안단처우어적적태세,정현어적—쾌속어적—완만어적적격국,40 a간어적적면적위223.1 km2,부재2000~2013년간해안단북부출현료침식。결론시수연사양하구이남안단잉총체처우어적적과정중,단시근년래강소해안적침식범위이경확전도료사양하구이남,저증명료강소해안침식안단유진일보확대적추세。
The Sheyang River Estuary is the demarcation point of coastal changes of Jiangsu Province, recession in the north, accretion in the south, and the length of receding coastline is gradually increased. To investigate and monitor the evolution of shoreline near the Sheyang River Estuary area, the coast between the Biandan Harbor in the north of the estuary and the Doulong Harbor in the south of the estuary was selected as the study site, and the Landsat data obtained in 1973, 1987, 2000 and 2013 were used to extract the shorelines. Then the spatial-temporal changes of the coastal area were analyzed. The present study indicates that the coast area in the north of the estuary is in the state of erosion showing the pattern of erosion-accretion-slow erosion, with the coastal area decreasing 12.6 km2and increasing 1.0 km2in 40 years. While the coast in the south of the estuary is in aggradation, revealing the change pattern of accretion-fast accretion-slow accretion, with the coastal area increasing 223.1 km2 in 40 years. The erosion has occurred since 2000 in the north of the Sheyang River Estuary southern coast.
