摘要
掌握江苏沿海滩涂的现状与变化情况对于江苏沿海大开发具有重要的意义。利用1975年、1984年、1992年、2002年和2009年5个时相的多源遥感影像对江苏盐城—南通段海岸线变迁与滩涂围垦情况进行动态监测,获取每个时期发生变化的岸段、滩涂围垦面积等信息,并结合GIS的空间分析工具进行了定量分析。结果表明:利用遥感影像能够满足准确、快速监测海岸线变迁的要求;1975—1984年,江苏省海岸线快速向海域推进,滩涂围垦面积为46 045 hm2;1984—1992年间岸线推进速度有所放缓,新增陆地面积为9 955 hm2;1992—2002年与2002—2009年两个时间段内,海岸线全面加速向海域推进,围垦面积分别为53 055 hm2和36 360 hm2。总体而言,1975—2009年间江苏海岸线变化呈现快—慢—全面加速推进的特点。
Grasping the present situation and change of Jiangsu coastal zone is of important for Jiangsu coastal development.Five images of multi-source remote sensing images（five images in the years of 1975 and 1984,1992,2002 and 2009 were used to monitor the coastline changes and tidal flat reclaimation in Yancheng-Nantong region of Jiangsu Province.Assisted by the spatial analysis tools of GIS,the results show that the five remote sensing images could meet the requirement of precisely and quickly monitoring coastline change;the coastline of Jiangsu expanded forward ocean forward fast from 1975 to 1984,the reclamation area was 46 045 hm2;the process of tidal flat reclaimation slowed down during 1984-1992,the new land area was 9 955 hm2;the advance speed of coastline had been improved greatly in the following two periods,the reclaimation area was 53 055 hm2 during 1992-2002 and 36 360 hm2 from 2002 to 2009.In general,there is direct proportional relationship between the advance speed of coastline and the reclaimation area of tidal flat.
出处
《人民黄河》
CAS
北大核心
2013年第1期85-87,共3页
Yellow River
基金
国家自然科学基金资助项目(50579013)
江苏省科技支撑计划项目(BE2010316)
关键词
多源遥感影像
海岸线变迁
滩涂围垦
江苏省
multi-source remote sensing images
coastline change
tidal flat reclamation
Jiangsu provice
