Remote Sens. 2013, 5(11), 6138-6158; doi:10.3390/rs5116138
Article

Quantitative Analysis of the Waterline Method for Topographical Mapping of Tidal Flats: A Case Study in the Dongsha Sandbank, China

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Received: 7 October 2013; in revised form: 6 November 2013 / Accepted: 13 November 2013 / Published: 21 November 2013
(This article belongs to the Special Issue Remote Sensing in Geomorphology)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: Although the topography of tidal flats is important for understanding their evolution, the spatial and temporal sampling frequency of such data remains limited. The waterline method has the potential to retrieve past tidal flat topography by utilizing large archives of satellite images. This study performs a quantitative analysis of the relationship between the accuracy of tidal flat digital elevation models (DEMs) that are based on the waterline method and the factors that influence the DEMs. The three major conclusions of the study are as follows: (1) the coverage rate of the waterline points and the number of satellite images used to create the DEM are highly linearly correlated with the error of the resultant DEMs, and the former is more significant in indicating the accuracy of the resultant DEMs than the latter; (2) both the area and the slope of the tidal flats are linearly correlated with the error of the resultant DEMs; and (3) the availability analysis of the archived satellite images indicates that the waterline method can retrieve tidal flat terrains from the past forty years. The upper limit of the temporal resolution of the tidal flat DEM can be refined to within one year since 1993, to half a year since 2004 and to three months since 2009.
Keywords: tidal flats; coastal morphology; digital elevation model; the waterline method
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MDPI and ACS Style

Liu, Y.; Li, M.; Zhou, M.; Yang, K.; Mao, L. Quantitative Analysis of the Waterline Method for Topographical Mapping of Tidal Flats: A Case Study in the Dongsha Sandbank, China. Remote Sens. 2013, 5, 6138-6158.

AMA Style

Liu Y, Li M, Zhou M, Yang K, Mao L. Quantitative Analysis of the Waterline Method for Topographical Mapping of Tidal Flats: A Case Study in the Dongsha Sandbank, China. Remote Sensing. 2013; 5(11):6138-6158.

Chicago/Turabian Style

Liu, Yongxue; Li, Manchun; Zhou, Minxi; Yang, Kang; Mao, Liang. 2013. "Quantitative Analysis of the Waterline Method for Topographical Mapping of Tidal Flats: A Case Study in the Dongsha Sandbank, China." Remote Sens. 5, no. 11: 6138-6158.

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