摘要
东海区大陆海岸线介于23°37′N–31°46′N,117°11′E–122°08′E之间。它北起长江口启东嘴,南到福建、广东交接的铁炉港,南北跨越8个纬度,横跨海、浙江、福建三省市。基于Landsat TM/OLI影像(空间分辨率均为30 m),经对影像解译及波段边缘检测,确定和修正岸线位置,得到1990–2015年5年间隔的东海区大陆海岸线时空分布数据。参考国家海岸基本功能规划的类型,并根据海岸线的自然状态和人为利用方式,将海岸线分为自然岸线和人工岸线两大类。自然岸线又分为基岩岸线、沙砾质岸线、淤泥质岸线和河口岸线;人工岸线又分为养殖岸线、港口码头岸线、建设岸线和防护岸线。通过不同年份岸线变迁强度、岸线分维数等相关模型,计算得到岸线变化强度、分形维数等数据,共同构成中国东海区5年间隔大陆海岸线及其类型时空变化数据集(1990–2015)。数据统计结果表明,东海区大陆岸线总长4,720.74 km(2015年)。自1990到2015年,自然岸线长度占总岸线的比例由68.06%减少到46.12%;人工岸线占总岸线长度的比例由31.94%增加到53.88%。该数据集内容包括1990–2015年的中国东海区以下数据:(1)5年间隔的大陆海岸线及其类型空间分布数据(.shp);(2)大陆岸线的类型结构数据(.xlsx);(3)各区域岸线的分形维数(.xlsx);(4)海岸线变化强度(.xlsx)。数据集主要以.shp格式和.xlsx存储,由43个数据文件组成,数据量为3.68 MB(压缩为1个文件,1.70 MB)。
Continental coastline in the East China Sea is located within 23°37′N–31°46′N and 117°11′E–122°08′E.Starting from Yangtze Estuary Qidongzui and extending to Port of Tielu where Fujian and Guangdong borders,the continental coastline spans 8 latitudes from south to north and stretches over Shanghai,Zhejiang and Fujian.The position of the continental coastline was determined and corrected based on Landsat TM/OLI images(spatial resolution:30 m)by image interpretation and waveband edge detection,and consequently spatiotemporal distribution data of the continental coastline in the East China Sea during 1990–2015(5-year intervals)were obtained.By referring to national basic coastline functional planning types and according to natural state and artificial use mode of the continental coastline,the coastline was divided into two major types:natural coastline and artificial coastline.The former was subdivided into bedrock,gravel,sludge and estuary coastlines,while the latter was subdivided into aquaculture,port,constructed and protective coastlines.Through various modeling techniques,transitional intensity and fractal dimension data of the coastline were calculated and jointly constituted a spatiotemporal change dataset of the continental coastline and its types with 5-year intervals in the East China Sea(1990–2015).Statistical results of the data set indicated that total length of the continental coastline in the East China Sea was 4,720.74 km(2015).From 1990 to 2015,the proportion occupied by the length of natural coastline in the total coastline length declined from 68.06%to 46.12%and that occupied by artificial coastline increased from 31.94%to 53.88%.There are four components of the dataset in the East China Sea during 1990–2015 as follows:(1)Spatial distribution data of the continental coastline and their types with 5-year intervals(.shp);(2)structured data of continental coastline types(.xlsx);(3)fractal dimensions of coastlines in different regions(.xlsx);and(4)coastline change intensity(.xlsx).Saved mainly in.shp and.xlsx formats,this dataset consisted of 43 data files with a data size of 3.68 MB(compressed into 1 file with 1.70 MB).
作者
李加林
田鹏
邵姝遥
赵梦琪
Li,J.L.;Tian,P.;Shao,S.Y.;Zhao,M.Q.(Donghai Institute,Ningbo University,Ningbo 315211,China;Department of Geography&Spatial Information Techniques,Ningbo University,Ningbo 315211,China)
出处
《全球变化数据学报（中英文）》
CSCD
2019年第3期252-258,362-368,共14页
Journal of Global Change Data & Discovery
基金
NSFC-浙江两化融合联合基金(U1609203)
国家社会科学基金(16ZDA050).
关键词
海岸线
岸线分形维数
岸线利用强度
东海区
coastline
coastline fractal dimension
coastline use intensity
the East China Sea
作者简介
通讯作者:李加林,X-4440-2019,宁波大学东海研究院,nbnj2001@163.com
