基于多时相遥感数据的宁波市海岸线变迁研究

Research on Coastline Change in Ningbo City Based on Multi-temporal Remote Sensing Images

海岸线的动态监测可为海岸带自然保护及可持续发展提供科学依据和决策支持。以宁波市为研究区域,利用2003～2015年的多源遥感影像,通过对遥感影像空间与地理空间的相关关系分析,采用阈值分割与人工修正结合的方法分别提取不同年份的海岸线并对其精度进行分析。在此基础上,结合宁波市海岸线与宁波市地理国情普查数据、基础测绘数据及其他行业部门数据进行综合分析研究,揭示宁波市海岸线变化规律,并从自然因素和人为因素两个方面分析宁波海岸线变化的动力机制。

Coastline change detection provides scientific basis and decision support for coastal zone protection and sustainable development. Based on the analysis of correlation between remote sensing data and geospatial data, taking the multitemporal remote sensing images of Ningbo City as experimental data, we used the threshold segmentation algorithm and manual corrections to extract coastlines in different years. And then, combining with the geographical conditions monitoring data, the basic surveying and mapping data and major sectors data, we analyzed the change regulation and change factors of coastline by nature and humanity factors in Ningbo City.