摘要
针对海岸线研究提取时难以去除潮汐的影响的问题,提出了利用潮汐规律修正海岸线的方法。以青岛地区为例,基于Landsat数据利用修正归一化水体指数提取了水边线,分析了潮汐规律对海岸水边线信息提取的影响,结合海岸高程数据提出了潮位校正方法。最后基于提取的长时间序列海岸线分析了青岛地区1979-2019年海岸线时空格局变化。结果表明,利用潮汐规律进行潮位校正的方法可行且精度较高;近40年间青岛地区海岸线共向海洋推进158km2,变化活跃区域呈现由胶州湾向青岛南部转移的趋势。
In view of the fact that most coastline research extract instantaneous waterline,which is difficult to remove the influence of tide on coastline extraction,a method of using tide law to modify coastline is proposed.Taking Qingdao area as an example,this paper extracts the water edge line based on Landsat data using modified normalized water body index(MNDWI),analyzes the influence of tidal law on coastal waterside line information extraction,and proposes the tide level correction method based on coastal elevation data.Finally,based on the extracted long-term sequence coastline,the temporal and spatial patterns of coastline in Qingdao area from 1979 to 2019 are analyzed.The results show that the method of tidal level correction using tidal law is feasible and accurate.In the past 40 years,the coastline of Qingdao has been promoted to 158 km2.The active area of change shows a trend of shifting from Jiaozhou bay to southern Qingdao.
作者
孙孟昊
蔡玉林
顾晓鹤
王雪丽
秦鹏
SUN Menghao;CAI Yulin;GU Xiaohe;WANG Xueli;QIN Peng(Shandong University of Science and Technology,Qingdao,Shandong 266590,China;Shandong Key Laboratory of Basic Geogra phic Information and Digital Technology,Qingdao,Shandong 266590,China;Beijing Agricultural Information Technology Research Center,Beijing 100097,China)
出处
《遥感信息》
CSCD
北大核心
2019年第6期105-112,共8页
Remote Sensing Information
基金
国家重点研发计划专项(2017YFC1405006)
国家自然科学基金(41807170)
