Methods for extracting information about coastline, mean high tide line and mean low tide line from satellite images are investigated based on the satellite images which have a spatial resolution of 10 m and were obtained in the coastal area of Yancheng of Jiangsu Province in 2006, 2008 and 2009, respectively. On the basis of these studies, the evolution of the coastal sections influenced by human activities such as harbor construction and sea reclamation for farming is analyzed. The results show that (1) comparing with the low-resolution remote sensing images, the high-resolution images can be used to extract more subtle culture features, from which the mean high tide line can be extracted; (2) by combining with the tide level of the day and based on the high tide line extracted already, the instantaneous water edge on the images and the leaner relationship among them, the mean low tide line may possibly be worked out; (3) it has been seen from the results obtained by the above methods that the mean high tide line in the study area has been being in an accretion state since 2006, with an increasing magnitude every year, while the mean low tide line was in a dynamic balance state from 2006 to 2008, but was eroded by 840 m from 2008 to 2009, being very distinct in its change.
high resolutionaccretion-erosion variationextraction methodmean high tide linemean low tide line
NETL
NSTL
维普
万方数据
