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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。
Based on remote sensing and GIS technology, the ridges and troughs of the South Yellow Sea radiation sand bank in 1979, 1990, 2002 and 2014 were extracted, and the temporal and spatial variation characteristics were systematically analyzed. The results show that: (1) The ridgeline of the radiation sand bank can be divided into two main lines and branch lines. The main ridge of the beach ridge is the sloping line of slime mud-high mud-Dongsha tidal flat, The combination of the spatial distribution of the ridges on the Shazhou tidal flat is generally stable. The main ridge of the ridge of the riparian mud line is generally east-west. The main line of the Dongsha segment is generally north-south. The main line connecting the ridges of the Gao- And the main beach of Dongsha section and Gaoka section mainly migrate to the east. The migration distance is from the main line of the ridges in the section of Sai Nai> Gao mud section, Dong Sha section, Sliver mud On both sides of the main line of the section of the main section of the beach ridge, both the northern section of the main ridge of the Dongsha section of the beach and the ridgeline of the slime mudflats are more prominent than the branches of the eastern beach ridge.