文章摘要
沈昕颖,杨红,王春峰,李经纬.基于遥感图像的1990—2020年盐城海岸带湿地景观时空动态变化[J].上海海洋大学学报,2022,31(4):972-983.
SHEN Xinying,YANG Hong,WANG Chunfeng,LI Jingwei.Dynamic changes of wetland landscape in the coastal zone of Yancheng from 1990 to 2020 based on remote sensing images[J].Journal of Shanghai Ocean University,2022,31(4):972-983.
基于遥感图像的1990—2020年盐城海岸带湿地景观时空动态变化
Dynamic changes of wetland landscape in the coastal zone of Yancheng from 1990 to 2020 based on remote sensing images
投稿时间:2021-04-23  修订日期:2022-01-26
DOI:10.12024/jsou.20210403410
中文关键词: 湿地景观  盐城海岸带  动态变化  面向对象分类
英文关键词: wetland landscape  Yancheng coastal zone  dynamic change  object-oriented classification
基金项目:国家电投海上风电场工程鸟类及生境评价项目(D-8006-16-8027);黄海绿潮业务化预测预警关键技术研究与应用项目(201205010)
作者单位E-mail
沈昕颖 上海海洋大学 海洋生态与环境学院, 上海 201306  
杨红 上海海洋大学 海洋生态与环境学院, 上海 201306  
王春峰 上海海洋大学 海洋生态与环境学院, 上海 201306 cfwang@shou.edu.cn 
李经纬 上海海洋大学 海洋生态与环境学院, 上海 201306  
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中文摘要:
      基于Landsat系列卫星图像、Google earth卫星图像等并利用面向对象的监督分类方法,在对景观进行两级分类的基础上,进行1990—2020年江苏省盐城市海岸带湿地景观的变化分析。结果表明:30 a间盐城海岸带自然湿地景观总面积呈下降趋势,人工湿地和非湿地景观面积占比上升。研究区整体与分区自然湿地面积占比变化趋势一致,呈现“下降-加速下降-略微抬升”的趋势,其中潮间淤泥海滩的变化速率最高。盐城北区、南区湿地的潮间盐水沼泽分别为北区占比8.77%、南区占比17.64%。海岸带整体变化趋势表现为“自然湿地-人工湿地-非湿地”,其中2000—2010年间湿地丧失速率最为显著,湿地总面积净减少360.27 km2,年均丧失率高达1.29%。从不同时间段盐城海岸带景观转移特征来看存在差异:1990—2000年间,各湿地景观转移方向比较分散,大多以自然湿地或非湿地内部转移为主;2000—2010年间,以潮滩向养殖水域转化为主导;2010—2020年间,耕地、河流、林地和浅海水域都有向淤泥潮间海滩转化的趋势,潮间淤泥海滩、潮间盐沼水域和养殖水域转化趋势最强烈的方向为建筑用地。建议在经济发展的同时,合理布局规划、控制规模,保持盐城海岸带自然湿地的主要功能。
英文摘要:
      Based on Landsat series satellite images, Google earth satellite images and object-oriented supervised classification method, the changes of coastal wetland landscape in Yancheng City, Jiangsu Province from 1990 to 2020 were analyzed on the basis of two-level classification of landscape. The results showed that:The total area of natural wetland landscape in Yancheng coastal zone showed a downward trend in the past 30 years, and the proportion of constructed wetland and non-wetland landscape area increased. The change trend of natural wetland area proportion in the study area was consistent with that in the partition, showing a trend of ‘decline-accelerated decline-slightly uplift’, and the change rate of intertidal mud beach was the highest. The proportion of intertidal saline marshes in the northern and southern Yancheng wetlands was 8.77% and 17.64%, respectively. The overall trend of coastal zone was ‘natural wetland-constructed wetland-non-wetland’. The wetland loss rate was the most significant from 2000 to 2010. The total area of wetland decreased by 360.27 km2, and the average annual loss rate was as high as 1.29%. There were differences in the landscape transfer characteristics of Yancheng coastal zone in different periods. During 1990-2000, the landscape transfer directions of each wetland were relatively dispersed, and most of them were transferred within natural wetland or non-wetland. During 2000-2010, the transformation from tidal flat to aquaculture waters was dominant. During 2010-2020, cultivated land, rivers, woodlands and shallow waters all showed a trend of transformation to intertidal mud beaches. The most intense transformation trend of intertidal mud beaches, intertidal salt marsh waters and aquaculture waters was construction land. It is suggested that the main functions of natural wetlands in Yancheng coastal zone should be maintained with reasonable layout, planning and control of scale during the period of economic development.
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