Spatial and Temporal Evolution Characteristics of the Salween River Delta from 1973 to 2021
We obtained sixteen clear-sky remote sensing images of Landsat series data from 1973 to 2021 and extracted continental and island coastlines of the Salween River Delta based on the Modified Normalized Difference Water Index (MNDWI) and visual interpretation correction. We determined the overall evol...
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| Format: | Article |
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MDPI AG
2023-03-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/15/5/1467 |
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| author | Aoyang He Jiangcheng Huang Zhengbao Sun Jingyi Zhou Cheng Yang |
| author_facet | Aoyang He Jiangcheng Huang Zhengbao Sun Jingyi Zhou Cheng Yang |
| author_sort | Aoyang He |
| collection | DOAJ |
| description | We obtained sixteen clear-sky remote sensing images of Landsat series data from 1973 to 2021 and extracted continental and island coastlines of the Salween River Delta based on the Modified Normalized Difference Water Index (MNDWI) and visual interpretation correction. We determined the overall evolution of coastlines with statistical and superposition analysis and applied the Digital Shoreline Analysis System (DSAS) to summarize the spatial and temporal evolution process and characteristics in the past 50 years. Experimental results show that (1) the overall change of the coastline was more rapid on the island than on the continent, and on the Indian Ocean side than on the continental side, (2) the total area of the island increased by 91.16 km<sup>2</sup> from 1973 to 2021, the area of Bilu Island increased by 50.38 km<sup>2</sup>, the length of the continental coastline decreased by 0.39 km, and the length of the coastline of the Bilu Island increased by 6.43 km, (3) the Linear Regression Rate (LRR) were: 4.69 m/yr for the total coastline, 1.06 and −2.07 m/yr, respectively, for the western and southern branches of the continental coastline, and 0.83 and 21.52 m/yr, respectively, for the continental and Indian Ocean sides of Bilu Island, and (4) the dominant process in the Salween River Delta was accretion, with an overall accretion area of about 10 km<sup>2</sup>, and an unstable accretion rate. |
| first_indexed | 2024-03-11T07:12:02Z |
| format | Article |
| id | doaj.art-f02fedd25fe741fb8c4712e4e2691651 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-11T07:12:02Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-f02fedd25fe741fb8c4712e4e26916512023-11-17T08:33:31ZengMDPI AGRemote Sensing2072-42922023-03-01155146710.3390/rs15051467Spatial and Temporal Evolution Characteristics of the Salween River Delta from 1973 to 2021Aoyang He0Jiangcheng Huang1Zhengbao Sun2Jingyi Zhou3Cheng Yang4Institute of International Rivers and Eco-Security, Yunnan University, Kunming 650500, ChinaInstitute of International Rivers and Eco-Security, Yunnan University, Kunming 650500, ChinaSchool of Engineering, Yunnan University, Kunming 650500, ChinaSchool of Earth Sciences, Yunnan University, Kunming 650500, ChinaInstitute of International Rivers and Eco-Security, Yunnan University, Kunming 650500, ChinaWe obtained sixteen clear-sky remote sensing images of Landsat series data from 1973 to 2021 and extracted continental and island coastlines of the Salween River Delta based on the Modified Normalized Difference Water Index (MNDWI) and visual interpretation correction. We determined the overall evolution of coastlines with statistical and superposition analysis and applied the Digital Shoreline Analysis System (DSAS) to summarize the spatial and temporal evolution process and characteristics in the past 50 years. Experimental results show that (1) the overall change of the coastline was more rapid on the island than on the continent, and on the Indian Ocean side than on the continental side, (2) the total area of the island increased by 91.16 km<sup>2</sup> from 1973 to 2021, the area of Bilu Island increased by 50.38 km<sup>2</sup>, the length of the continental coastline decreased by 0.39 km, and the length of the coastline of the Bilu Island increased by 6.43 km, (3) the Linear Regression Rate (LRR) were: 4.69 m/yr for the total coastline, 1.06 and −2.07 m/yr, respectively, for the western and southern branches of the continental coastline, and 0.83 and 21.52 m/yr, respectively, for the continental and Indian Ocean sides of Bilu Island, and (4) the dominant process in the Salween River Delta was accretion, with an overall accretion area of about 10 km<sup>2</sup>, and an unstable accretion rate.https://www.mdpi.com/2072-4292/15/5/1467Salween River Deltaspatial and temporal evolution characteristicsLandsat remote sensing imagesDSAS |
| spellingShingle | Aoyang He Jiangcheng Huang Zhengbao Sun Jingyi Zhou Cheng Yang Spatial and Temporal Evolution Characteristics of the Salween River Delta from 1973 to 2021 Remote Sensing Salween River Delta spatial and temporal evolution characteristics Landsat remote sensing images DSAS |
| title | Spatial and Temporal Evolution Characteristics of the Salween River Delta from 1973 to 2021 |
| title_full | Spatial and Temporal Evolution Characteristics of the Salween River Delta from 1973 to 2021 |
| title_fullStr | Spatial and Temporal Evolution Characteristics of the Salween River Delta from 1973 to 2021 |
| title_full_unstemmed | Spatial and Temporal Evolution Characteristics of the Salween River Delta from 1973 to 2021 |
| title_short | Spatial and Temporal Evolution Characteristics of the Salween River Delta from 1973 to 2021 |
| title_sort | spatial and temporal evolution characteristics of the salween river delta from 1973 to 2021 |
| topic | Salween River Delta spatial and temporal evolution characteristics Landsat remote sensing images DSAS |
| url | https://www.mdpi.com/2072-4292/15/5/1467 |
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