摘要
基于遥感和GIS技术,提取了南黄海辐射沙洲1979年、1990年、2002年和2014年4个时期的潮滩脊线,并对时空变化特征进行系统分析。研究显示:(1)辐射沙洲潮滩脊线可分为主线和支线2级,滩脊主线为条子泥-高泥-东沙潮滩脊线,支线为滩脊主线两侧分支;(2)辐射沙洲潮滩脊线空间组合形态总体稳定,条子泥段滩脊主线总体呈东西向,东沙段滩脊主线总体呈南北向,高泥段滩脊主线连接条子泥和东沙;(3)滩脊线演变呈显著空间分异,条子泥段滩脊主线南向迁移显著,东沙段和高泥段滩脊主线总体向东迁移,迁移距离条子泥段滩脊主线>高泥段、东沙段,条子泥段滩脊主线中部>两侧、东沙段滩脊主线北段>南段,条子泥滩脊支线形态和位置变化均较东沙滩脊支线显著。
The tidal fiat ridge line is the typical geomorphic feature line of the tidal fiat area in radiation sand- bank, and it is important for understanding the temporal and spatial changes of the tidal fiat with the analysis of the beach ridge lines changes. Based on remote sensing and GIS technology, the tidal fiat ridges of radiation sandbank in 1979, 1990, 2002 and 2014 were extracted, and the spatial-temporal changes were systematically analyzed. The study shows that, the ridge lines of radiation tidal fiat can be divided into main line and branch line, the main line of tidal flat ridge is the Tiaozini-Gaoni-Dongsha tidal flat ridge, the branch lines are located on both sides of the main line. The spatial pattern of the tidal fiat ridge line is generally stable. The main line of Tiaozini section is generally east-west, Dongsha section is north-south, Gaoni section connects the Tiaozini and Dongsha. The ridge line evolution has significant spatial differentiation, the main line of Tiaozini section migrated southward obviously, Dongsha and Gaoni section mainly migrated eastward. The migration distance of the main tidal flat ridge line showed as Tiaozini section 〉 Gaoni section and Dongsha section, the middle part 〉both ends in the main line of Tiaozini section, northern 〉 southern in the main line of Dongsha section. The morphological and positional changes of branch lines in Tiaozini were more obvious than that in Dongsha.
出处
《地理科学》
CSSCI
CSCD
北大核心
2017年第10期1593-1599,共7页
Scientia Geographica Sinica
基金
海洋公益性行业科研专项(201405028)资助~~
关键词
遥感
辐射沙洲
潮滩脊线
时空变化
remote sensing
radiation sandbar
tidal flat ridge
spatial-temporal changes
