摘要
本文为研究近20年来宁波象山湾海岸线的变迁过程,以及了解目前象山湾领域岸线开发利用情况,以TM及Landsat 8遥感影像为数据源,分别提取1995、2007、2016年三个时期的海岸线和变化区内的土地覆盖类型,并分析1995~2007和2007~2016两个时间段内岸线长度变化,和变化区域内的土地覆盖类型的转变。结果表明:1) 象山湾大陆岸线在不断缩减,20年期间共减少19.11 km,其中自然岸线缩减较多,人工岸线增加明显;2) 1995~2016年岸线整体向海域移动,陆域面积增加了30.885 km2,其中,增长最多的为建设用地及围海养殖用地,增长的用地多为新建城镇、住宅区、工业用地、或者海洋公园以及港口码头等。
This paper is to study the transition process of the Xiangshan Bay coastline in Ningbo in the past 20 years,and to understand the current development and utilization of the coastline in the Xiangshan Bay area.Extracting the coastline and the types of land cover in the change areas of the three periods of 1995,2007 and 2016,then analyzes the change of coastline length during the two periods of 1995-2007 and 2007-2016 and the change of land cover types in the changed area.The results show that:1)The coastline of the Xiangshan Bay is shrinking,with a total reduction of 19.11 km,among them,the natural shoreline has been reduced,and the artificial shoreline has increased significantly;2)From 1995 to 2016,the coastline has moved to the ocean by a land area of 30.885 km2,among then,the most growth type is construction land,and the growth area consists of towns,residence,industrial areas,industrial areas,or tourist area,marine park,and port terminal.
