%0 Journal Article
%T Application of remote sensing medial axis method in investigation of dynamic changes of tidal creeks in radial sandbanks offshore Jiangsu Province<br>遥感中轴线法在江苏辐射沙洲潮沟演变监测中的应用
%A LIU Yan-chun
%A ZHANG Ying
%A <br>刘燕春
%A 张鹰
%J 海洋科学
%D 2011
%I 
%X The coast of Jiangsu Province is famous for its radial sandbanks offshore. Dynamic changes of tidal creeks are difficult to survey for complex, quick-changing terrain. Medial axis methods of tidal creeks are the focus of this paper. The concept of medial axis in mathematics, as well as voronoi diagram (V diagram) in GIS for its special properties, was introduced and discussed,. Points in every edge of V diagram have the shortest distance to adjacent edges of polygon. Thus, medial axis extraction is converted to V diagram generation. Remote Sensing Medial Axis method (RSMA method) is presented because it is quick and convenient for survey, much better than previous traditional visual interpretation methods. Using the RSMA method, five main tidal creeks in the area were extracted and studied based on four TM images from 1988, 1995, 2003 and 2008. The results showed that: (1) for analysis on main tidal creeks in different time, RSMA method revealed the dynamic evolution quickly and accurately; (2) during the last 20 years, Xiyang deep trough had the greatest changes as the west coast retreated back and the east extended east; while the rest four tidal creeks moved in the north-south direction periodically and went straight gradually. Therefore, study on the evolution of tidal creeks has great significance for monitoring the dynamic changes of tidal fiat, development and utilization of coastal zone and the construction of coastal engineering.
%K radial sandbanks offshore
%K tidal creek
%K RSMA method
%K Voronoi diagram
%K dynamic changes<br>遥感中轴线法
%K 辐射沙洲
%K 潮沟演变
%K Voronoi
%K 图
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=2D9C75573FA3E416&jid=DFE7B94EB76B8F26135C9890832CEF6A&aid=6C30F198E00FBC167EA8F5A6B113CC88&yid=9377ED8094509821&vid=6209D9E8050195F5&iid=0B39A22176CE99FB&sid=AA76E167F386B6B3&eid=228A710F49B6CE58&journal_id=1000-3096&journal_name=海洋科学&referenced_num=0&reference_num=13