基于遥感的2001—2021年浙江省大陆海岸线变化分析

Analysis of Continental Shoreline Changes in Zhejiang Province from 2001 to 2021 Based on Remote Sensing

基于RS、GIS等相关技术,通过目视解译的方法,提取了浙江省大陆沿岸2001、2006、2011、2016、2021年海岸线,通过网格法定量计算20年间海岸线崎岖性变化;从湾区视角分析海岸线变化的空间特征。结果显示:2001—2021年浙江省大陆海岸线呈增长趋势,主要增长时间段为2016—2021年,主要增长区域为宁波市和温州市;浙江省海岸线变化主要受湾区影响;杭州湾、三门湾、台州湾、乐清湾、瓯江口历年海岸线变化程度较高,象山港海岸线变化较小。同时,对各市海岸线变化原因进行了分析,探讨了湾区在浙江大陆海岸线变化中的作用。

Based on RS,GIS and other related technologies,the coastline of Zhejiang province in 2001,2006,2011,2016 and 2021 was extracted by visual interpretation method,and the change of coastline craggy in 20 years was quantitatively calculated by grid method.The spatial characteristics of coastline change were analyzed from the perspective of bay area.The results showed that the continental coastline of Zhejiang province showed an increasing trend from 2001 to 2021,and the main growth period was from 2016 to 2021,and the main growth areas were Ningbo and Wenzhou.The coastal change of Zhejiang province is mainly affected by bay area.Hangzhou bay,Sanmen bay,Taizhou bay,Yueqing bay and Oujiang estuary have a high degree of coastline change over the years,while Xiangshan port has a small change.At the same time,the paper analyzes the reasons for the coastline change of each city,and discusses the role of bay area in the coastline change of Zhejiang mainland.