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Morphology of coastal salt marsh margins: a study using UAV-based Structure-from-Motion photogrammetry
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Yidong Guo1, 2, Hangjie Lin1, Qian Yu1, *, Yiyang Fan1, Ke Luo3, Yunwei Wang4, Jinyao Gao2, Shu Gao1
Haiyang Xuebao | 2022, 44(12) : 148 - 160
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Haiyang Xuebao | 2022, 44(12): 148-160
• Research Note •
Morphology of coastal salt marsh margins: a study using UAV-based Structure-from-Motion photogrammetry
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Yidong Guo1, 2, Hangjie Lin1, Qian Yu1, *, Yiyang Fan1, Ke Luo3, Yunwei Wang4, Jinyao Gao2, Shu Gao1
Affiliations
  • 1. Key Laboratory of Coast and Island Development of the Ministry of Education, School of Geography and Ocean Science, Nanjing University, Nanjing 210023, China
  • 2. Key Laboratory of Submarine Geosciences, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
  • 3. College of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing 210024, China
  • 4. School of Marine Science and Engineering, Nanjing Normal University, Nanjing 210023, China
Published: 2022-12-01 doi: 10.12284/hyxb2022147
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Coastal salt marsh margin, as the transition zone between salt marsh and tidal flat, presents three types of three-dimensional form: smooth, transition and cliff. And it shows different curvilinear features in the planar shape. As a high dynamic bio-geomorphic system, marsh margin changes rapidly due to the influence of natural processes and human activities. But the lack of high-resolution observational data makes further understanding of this change difficult. Here, we address this challenge using UAV-based Structure-from-Motion (UAV-SfM) photogrammetry which has the advantages of high resolution, non-invasive, repeatability, and low cost. We conducted two aerial surveys of salt marsh on Jiangsu coast, to obtain orthophotographs and Digital Surface Model (DSM) with cm-level pixel resolutions. And it supports us to determine the location of marsh margin, classify the type of the margin, and quantitatively describe the topography changes. We found the smooth and cliff margin are stable and dominant. The smooth margin has complex planar shape and retreats slowly. And the transition and cliff margin have regular shape and retreat fast. The transition margin changes drastically and turns to the cliff margin. This work proves that UAV-SfM photogrammetry is suitable for efficient and accurate quantification of the topography of marsh margin, and provides a new perspective for understanding the evolution process of marsh margin.

UAV-based SfM photogrammetry  /  salt marsh margin  /  geomorphology monitoring  /  morphodynamics
Yidong Guo, Hangjie Lin, Qian Yu, Yiyang Fan, Ke Luo, Yunwei Wang, Jinyao Gao, Shu Gao. Morphology of coastal salt marsh margins: a study using UAV-based Structure-from-Motion photogrammetry[J]. Haiyang Xuebao, 2022 , 44 (12) : 148 -160 . DOI: 10.12284/hyxb2022147
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Year 2022 volume 44 Issue 12
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Article Info
doi: 10.12284/hyxb2022147
  • Receive Date：2021-10-22
  • Online Date：2026-02-01
  • Published：2022-12-01
Article Data
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History
  • Received：2021-10-22
  • Revised：2022-06-01
Funding
Affiliations
    1. Key Laboratory of Coast and Island Development of the Ministry of Education, School of Geography and Ocean Science, Nanjing University, Nanjing 210023, China
    2. Key Laboratory of Submarine Geosciences, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
    3. College of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing 210024, China
    4. School of Marine Science and Engineering, Nanjing Normal University, Nanjing 210023, China
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多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
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小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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