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Journal of Applied Remote Sensing • Open Access

Observation of sand waves in the Taiwan Banks using HJ-1A/1B sun glitter imagery
Author(s): Hua-guo Zhang; Xiu-lin Lou; Ai-qin Shi; Xie-kai He; Wei-bing Guan; Dong-ling Li

Paper Abstract

This study focuses on the large sand waves in the Taiwan Banks. Our goals are to observe the sand waves as completely as possible, to obtain their direction, wavelength, density, and ridge length, to analyze their spatial distributions, and to understand the effects of the current field and water depth on the sand waves. This study demonstrates the possibility of using HJ-1A/1B sun glitter imagery with a large swath width and rapid coverage in studying sand waves. Six cloud-free HJ-1A/1B optical images with sun glitter signals received during 2009 to 2011 were processed. The sand waves were mapped based on their features in the images; their direction, wavelength, density, and ridge length were measured and analyzed. We identified 4604 sand waves distributed in an area of 16,400  km2. The distributions of sand waves and their characteristics were analyzed, and the differences of sand waves between the northwestern subregion and the southeastern subregion are reported. Further analysis and discussion of the relationships between spatial distribution of the sand waves and both the tidal current field from a numerical simulation and water depth led to some interesting conclusions. The current field determines the orientation of the sand wave, while the hydrodynamic conditions and water depth influence the shape, size, and density of sand waves to a certain degree.

Paper Details

Date Published: 12 August 2014
PDF: 21 pages
J. Appl. Remote Sens. 8(1) 083570 doi: 10.1117/1.JRS.8.083570
Published in: Journal of Applied Remote Sensing Volume 8, Issue 1
Show Author Affiliations
Hua-guo Zhang, The Second Institute of Oceanography, SOA (China)
Xiu-lin Lou, The Second Institute of Oceanography, SOA (China)
Ai-qin Shi, The Second Institute of Oceanography, SOA (China)
Xie-kai He, Zhejiang Univ. (China)
Wei-bing Guan, The Second Institute of Oceanography, SOA (China)
Dong-ling Li, The Second Institute of Oceanography, SOA (China)


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