A New Method for Automated Measurement of Sand Dune Migration Based on Multi-Temporal LiDAR-Derived Digital Elevation Models
While remote sensing methods have long been used for coastal and desert sand dune studies, few methods have been developed for the automated measurement of dune migration in large dune fields. To overcome a major limitation of an existing method named “pairs of source and target points (PSTP)”, this...
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| Format: | Article |
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MDPI AG
2021-08-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/13/16/3084 |
| _version_ | 1797522215309148160 |
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| author | Pinliang Dong Jisheng Xia Ruofei Zhong Zhifang Zhao Shucheng Tan |
| author_facet | Pinliang Dong Jisheng Xia Ruofei Zhong Zhifang Zhao Shucheng Tan |
| author_sort | Pinliang Dong |
| collection | DOAJ |
| description | While remote sensing methods have long been used for coastal and desert sand dune studies, few methods have been developed for the automated measurement of dune migration in large dune fields. To overcome a major limitation of an existing method named “pairs of source and target points (PSTP)”, this paper proposes a toe line tracking (TLT) method for the automated measurement of dune migration rate and direction using multi-temporal digital elevation models (DEM) derived from light detection and ranging (LiDAR) data. Based on a few simple parameters, the TLT method automatically extracts the base level of a dune field and toe lines of individual dunes. The toe line polygons derived from two DEMs are processed using logical operators and other spatial analysis methods implemented in the Python programming language in a geographic information system. By generating thousands of random sampling points along source toe lines, dune migration distances and directions are calculated and saved with the sampling point feature class. The application of the TLT method was demonstrated using multi-temporal LiDAR-derived DEMs for a 9 km by 2.4 km area in the White Sands Dune Field in New Mexico (USA). Dune migration distances and directions for three periods (24 January 2009–26 September 2009, 26 September 2009–6 June 2010, and 24 January 2009–6 January 2010) were calculated. Sensitivity analyses were carried out using different window sizes and toe heights. The results suggest that both PSTP and TLT produce similar sand dune migration rates and directions, but TLT is a more generic method that works for dunes with or without slipfaces that reach the angle of repose. |
| first_indexed | 2024-03-10T08:25:22Z |
| format | Article |
| id | doaj.art-62888951a2e84b28ae118976db7fe241 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-10T08:25:22Z |
| publishDate | 2021-08-01 |
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| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-62888951a2e84b28ae118976db7fe2412023-11-22T09:31:52ZengMDPI AGRemote Sensing2072-42922021-08-011316308410.3390/rs13163084A New Method for Automated Measurement of Sand Dune Migration Based on Multi-Temporal LiDAR-Derived Digital Elevation ModelsPinliang Dong0Jisheng Xia1Ruofei Zhong2Zhifang Zhao3Shucheng Tan4Department of Geography and the Environment, University of North Texas, Denton, TX 76203, USASchool of Earth Sciences, Yunnan University, Kunming 650500, ChinaBeijing Advanced Innovation Center for Imaging Theory and Technology, Capital Normal University, 105 West Third Ring North Road, Haidian District, Beijing 100048, ChinaSchool of Earth Sciences, Yunnan University, Kunming 650500, ChinaSchool of Earth Sciences, Yunnan University, Kunming 650500, ChinaWhile remote sensing methods have long been used for coastal and desert sand dune studies, few methods have been developed for the automated measurement of dune migration in large dune fields. To overcome a major limitation of an existing method named “pairs of source and target points (PSTP)”, this paper proposes a toe line tracking (TLT) method for the automated measurement of dune migration rate and direction using multi-temporal digital elevation models (DEM) derived from light detection and ranging (LiDAR) data. Based on a few simple parameters, the TLT method automatically extracts the base level of a dune field and toe lines of individual dunes. The toe line polygons derived from two DEMs are processed using logical operators and other spatial analysis methods implemented in the Python programming language in a geographic information system. By generating thousands of random sampling points along source toe lines, dune migration distances and directions are calculated and saved with the sampling point feature class. The application of the TLT method was demonstrated using multi-temporal LiDAR-derived DEMs for a 9 km by 2.4 km area in the White Sands Dune Field in New Mexico (USA). Dune migration distances and directions for three periods (24 January 2009–26 September 2009, 26 September 2009–6 June 2010, and 24 January 2009–6 January 2010) were calculated. Sensitivity analyses were carried out using different window sizes and toe heights. The results suggest that both PSTP and TLT produce similar sand dune migration rates and directions, but TLT is a more generic method that works for dunes with or without slipfaces that reach the angle of repose.https://www.mdpi.com/2072-4292/13/16/3084LiDARspatial analysissand dune migrationtoe line tracking |
| spellingShingle | Pinliang Dong Jisheng Xia Ruofei Zhong Zhifang Zhao Shucheng Tan A New Method for Automated Measurement of Sand Dune Migration Based on Multi-Temporal LiDAR-Derived Digital Elevation Models Remote Sensing LiDAR spatial analysis sand dune migration toe line tracking |
| title | A New Method for Automated Measurement of Sand Dune Migration Based on Multi-Temporal LiDAR-Derived Digital Elevation Models |
| title_full | A New Method for Automated Measurement of Sand Dune Migration Based on Multi-Temporal LiDAR-Derived Digital Elevation Models |
| title_fullStr | A New Method for Automated Measurement of Sand Dune Migration Based on Multi-Temporal LiDAR-Derived Digital Elevation Models |
| title_full_unstemmed | A New Method for Automated Measurement of Sand Dune Migration Based on Multi-Temporal LiDAR-Derived Digital Elevation Models |
| title_short | A New Method for Automated Measurement of Sand Dune Migration Based on Multi-Temporal LiDAR-Derived Digital Elevation Models |
| title_sort | new method for automated measurement of sand dune migration based on multi temporal lidar derived digital elevation models |
| topic | LiDAR spatial analysis sand dune migration toe line tracking |
| url | https://www.mdpi.com/2072-4292/13/16/3084 |
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