Optical remote sensing for long-term changes of surface sediments on tidal flats: Preliminary results in the West Coast of Korea

Wook Park, Yoon Kyung Lee, Dong Jae Kwon, Joong Sun Won

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The main objective of this study is long-term monitoring of surface sediment on tidal flats using optical remote sensing. Tidal flat reflectance is sensitive to conditions that constantly change and cause variation of interstitial water contents along with exposure time, remnant water, etc. It is difficult to retrieve sediment grain size from optical reflectance alone without correcting the tidal condition effects. In this study, the tidal flat surface reflectance model according to grain size is proposed by two-step PCA transformation to remove tidal effects. The proposed method showed a potential to classify sediment by grain size regardless of exposure time and tidal conditions. We applied the method to nine scenes of LANDSAT TM images acquired between 1988 and 2009. The preliminary results well demonstrated that the proposed approach is effective to monitor changes of grain size distribution at a large scale independent of tidal conditions. However, this method has a limitation particularly over the vegetated areas and sand shoals mainly because of strong reflection in the NIR channels compared with other areas. For the validation, this study requires further field survey to obtain more in-situ data.

Original languageEnglish
Title of host publicationInternational Geoscience and Remote Sensing Symposium (IGARSS)
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages4335-4338
Number of pages4
ISBN (Electronic)9781479957750
DOIs
Publication statusPublished - 2014 Nov 4
EventJoint 2014 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2014 and the 35th Canadian Symposium on Remote Sensing, CSRS 2014 - Quebec City, Canada
Duration: 2014 Jul 132014 Jul 18

Publication series

NameInternational Geoscience and Remote Sensing Symposium (IGARSS)

Other

OtherJoint 2014 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2014 and the 35th Canadian Symposium on Remote Sensing, CSRS 2014
CountryCanada
CityQuebec City
Period14/7/1314/7/18

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Earth and Planetary Sciences(all)

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    Park, W., Lee, Y. K., Kwon, D. J., & Won, J. S. (2014). Optical remote sensing for long-term changes of surface sediments on tidal flats: Preliminary results in the West Coast of Korea. In International Geoscience and Remote Sensing Symposium (IGARSS) (pp. 4335-4338). [6947449] (International Geoscience and Remote Sensing Symposium (IGARSS)). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/IGARSS.2014.6947449