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| DOI | 10.1016/j.jag.2018.09.007 |
| Mapping shoreline indicators on a sandy beach with supervised edge detection of soil moisture differences | |
| van der Werff H.M.A. | |
| 发表日期 | 2019 |
| ISSN | 15698432 |
| 起始页码 | 231 |
| 结束页码 | 238 |
| 卷号 | 74 |
| 英文摘要 | This study describes a method to map shoreline indicators on a sandy beach. The hypothesis is that, on this beach, spectral albedo is predominantly determined by moisture content and water lines can, therefore, be detected as albedo contrasts. A laboratory experiment is performed to relate moisture content to image albedo, and supervised edge detection is subsequently used to map the shoreline indicators with remote sensing imagery. The algorithm is tested with data from visible, near-infrared and shortwave-infrared wavelength regions. These results are compared to shoreline indicators obtained by a field survey and a shoreline indicator derived from a digital elevation model. Both the water line present when the imagery was acquired, as well as the maximum extent of the last flood, can be detected as a single edge. Older high water lines are confused with the last high water line and appear dispersed, as there are multiple debris lines present on the beach. The low water line, usually in saturated sand, also appears dispersed due to the presence of channels and troughs. Shorelines are constant moving boundaries, which is why shoreline indicators are used as a proxy. Unlike a mathematical indicator that is based on an elevation model, our method is more sensitive to the dynamic nature of shorelines. Supervised edge-detection is a technique for generating reproducible measurements of shoreline indicator positions over time, and aids in the monitoring of coastline migration. © 2018 Elsevier B.V. |
| 英文关键词 | Edge detection; Indicator; Sandy beach; Schiermonnikoog; Shoreline; Template matching |
| 语种 | 英语 |
| scopus关键词 | algorithm; beach; detection method; digital elevation model; elevation; field survey; remote sensing; satellite imagery; shoreline; soil moisture |
| 来源期刊 | International Journal of Applied Earth Observation and Geoinformation
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/156562 |
| 作者单位 | Faculty for Geo-Information Science and Earth Observation, University of Twente, Enschede, AE 7500, Netherlands |
| 推荐引用方式 GB/T 7714 | van der Werff H.M.A.. Mapping shoreline indicators on a sandy beach with supervised edge detection of soil moisture differences[J],2019,74. |
| APA | van der Werff H.M.A..(2019).Mapping shoreline indicators on a sandy beach with supervised edge detection of soil moisture differences.International Journal of Applied Earth Observation and Geoinformation,74. |
| MLA | van der Werff H.M.A.."Mapping shoreline indicators on a sandy beach with supervised edge detection of soil moisture differences".International Journal of Applied Earth Observation and Geoinformation 74(2019). |
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