Study on Tidal Flat Evolution Trend in the Yao Sandbank Area Based on Remote Sensing

WU Jia-le; XU Min; LIU Bai-qiong

doi:10.3969/j.issn.1002-3682.2016.04.003

Abstract：The Yao Sandbank(YS) located in the southeastern sea area of Nantong ,Jian‐gsu Province ,is the largest sandbar in the south wing of the radial sand ridges off the Jiangsu coast .It is complex in the geomorphic forms of the trough ,but has relatively stable tidal flat and deep trough and is also rich in deep water coastline ,so that it has a great potential for development .Therefore ,the research on its geomorphological evolu‐tion is of great significance for its further exploitation and construction .Through the analyses of the remote sensing and survey data obtained in the radial sand ridge area in the year of 1987 ,1995 ,2000 ,2008 and 2015 and by using the remote sensing band com‐binations suitable for the sandbar shoreline of the YS ,information about typical tidal flat evolution in the past more than 20 years in the study area is obtained .The results show that from 1987 to 2015 the reclamation was developed rapidly and the artificial shoreline became more complicated in the inner edge of the YS .The combination form of the "channel‐sandbar system"in the YS appears generally to be silting at the eastern and southern sides of the inner edge and eroding at the northern side ,and the Xiaomiao‐hong Channel tends generally to move toward the south .The tidal flat varies spatially in its form and evolution trends in the north and the south .