摘要
作为我国第一个由岛屿组成的地级市,舟山市具备丰富的海洋资源,准确监测海岸线动态信息对其意义重大。而悬浮泥沙含量较大、岸线曲折、滩涂众多等给舟山群岛海岸线提取和时空演变分析带来了挑战。针对此问题,基于缨帽变换在表征地物含水量方面的优势,利用长时间序列卫星遥感数据开展海岸线时空演变分析。结果表明,该方法能够有效去除悬浮泥沙、岸线曲折、滩涂的影响,准确提取了海岸线动态信息。2000—2018年间的海岸线遥感信息提取结果表明,由各种人类活动主导的围填海使得舟山市海岸线总长度增加了约327.36 km,年均增加长度为18.19 km/a,年均增长速率为0.72%,岛屿面积增加了约112.26 km^(2),年均增加面积为6.24 km^(2)/a,年均增长速率为0.49%。研究可为提高复杂海洋环境下海岸线遥感信息提取精度、海岸开发与保护等提供参考。
With a special geographical location and abundant marine resources,Zhoushan is the first prefecture-level city composed of islands in China.Therefore,the acquisition of dynamic information on the coastline is of great significance to this area.However,the large amount of suspended sediments,the tortuous coastline,the numerous tidal flats and some other factors have brought a lot of challenges to coastline extraction and the analysis of the spatial-temporal dynamics in Zhoushan Islands.In order to solve this problem,the authors have developed a method for extracting coastline remote sensing information based on the tasseled cap transformation and used long time series satellite remote sensing data to carry out the analysis of the temporal and spatial evolution of the coastline.The experimental results show that the proposed method can effectively remove the influence of suspended sediments,winding coastline and shoals on the extraction of coastline information,and make its position accurate.From 2000 to 2018,the total length of the coastline of Zhoushan Islands increased by about 327.36 km,the average growth length was 18.19 km,the average growth rate was 0.72%,the total area of Zhoushan Islands increased by about 112.26 km^(2),the average growth area was 6.24 km^(2),and the average growth rate was 0.49%.The constructions of reclamation and marine projects seem to have been the main reasons for Zhoushan’s coastline changes.This study is of great significance for improving the accuracy of coastline remote sensing information extraction as well as coastal development and protection in complex marine environments.
作者
陈超
陈慧欣
陈东
张自力
张旭锋
庄悦
褚衍丽
陈建裕
郑红
CHEN Chao;CHEN Huixin;CHEN Dong;ZHANG Zili;ZHANG Xufeng;ZHUANG Yue;CHU Yanli;CHEN Jianyu;ZHENG Hong(Marine Science and Technology College, Zhejiang Ocean University, Zhoushan 316022, China;Zhejiang Province Ecological Environment Monitoring Centre (Zhejiang Key Laboratory of Ecological and Environmental Monitoring, Forewarning and Quality Control), Hangzhou 310012, China;State Key Laboratory of Satellite Ocean Environment Dynamics (Second Institute of Oceanography, MNR), Hangzhou 310012, China;State Information Center, Beijing 100045, China;Xiamen Raw Water Investment Co., Ltd., Xiamen 361000, China;School of Economics and Management, Zhejiang Ocean University, Zhoushan 316022, China)
出处
《国土资源遥感》
CSCD
北大核心
2021年第2期141-152,共12页
Remote Sensing for Land & Resources
基金
浙江省生态环境监测预警及质控研究重点实验室开放课题
浙江省省属高校科研院所基本科研业务费专项资金项目“多源时空数据支持下的海岸线信息提取及演变分析研究”(编号:2019J00003)
浙江海洋大学优秀硕士论文培育项目和国家自然科学基金项目“基于空间数据挖掘的高分辨率遥感图像水上桥梁目标识别与损毁评估”(编号:41701447)共同资助。
关键词
舟山群岛
海岸线
时空演变
复杂海洋环境
精度评价
Zhoushan Islands
coastline
spatial-temporal variations
complex marine environment
precision evaluation
