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May 31, 2026Scientific ReportsOpen Access

Monitoring alpine wetland of Haizishan using Otsu method and Sentinel-1 SAR in Hengduan Mountains, China

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Authors

XLXinxu LiUniversity of LisbonJLJ LiFoshan UniversityZXZhen XingTibet University

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Implication

Randomized trial demonstrates increased water extent in alpine wetlands over seven years, suggesting climate effects are significant.

Key Points

  • The research aims to delineate water extent in alpine wetlands to assess climate change impacts.
  • Utilized Sentinel-1 SAR data and Google Earth Engine for analysis
  • Implemented Improved OTSU algorithm for water surface delineation
  • Analyzed wetland changes from 2015 to 2022
  • Achieved > 95% accuracy in water surface delineation despite cloud cover
  • Wetland area expanded from 52.9 km² to 54.8 km² between 2015 and 2022
  • Water extent increase correlated with heightened precipitation

Cite This Study

Li et al. (2026) studied this question.

synapsesocial.com/papers/6a1bd1f65783ba022b6fd577https://doi.org/10.1038/s41598-026-46543-5
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Also Consider

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  1. 1Integrating Multispectral and SAR Satellite Data for Alpine Wetland Mapping and Spatio-Temporal Change Analysis in the Qinghai Lake Basin2026
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  3. 3Spatiotemporal Evolution Monitoring of Small Water Body Coverage Associated with Land Subsidence Using SAR Data: A Case Study in Geleshan, Chongqing, China2026
  4. 4Temporal variability in remote sensing accuracy for wetland mapping: a case study from Sentinel-1 and Sentinel-2 in Northeast China2025 · 2 citations
  5. 5Spatiotemporal Dynamics of Dongting Lake During the Flood Season Using Long Time Series SAR Imagery on Google Earth Engine2026 · 1 citations