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<p>Lake Acıgöl, one of the world’s leading natural sodium sulfate (thenardite) production sites, hosts numerous endemic species due to its unique ecosystem characteristics. As a crucial stopover for migratory birds, Acıgöl is currently facing the threat of extinction. This situation poses a significant risk to the lake’s unique ecosystem and its endemic species. This study investigates the water body changes and shoreline retreat rate of Acıgöl, the world's second-largest alkaline lake, which is formed by natural sodium sulfate (thenardite) deposition. In the study, datasets obtained using Remote Sensing (RS) technology were analyzed in detail through Geographic Information Systems (GIS). The Modified Normalized Difference Water Index (MNDWI) was employed to determine the spatial changes in the lake’s water body, while the Digital Shoreline Analysis System (DSAS) was used to calculate the shoreline retreat rate. At the end of the 41-year study period, it was determined that the lake’s water body had undergone a spatial change of 81.91%. Additionally, a shoreline retreat of over nine kilometers was observed on the western side of Lake Acıgöl, with the shoreline retreat rate calculated at 200.38&#xa0;m/year. Despite the spatial reduction in the lake water body, a twenty-nine-fold increase in the area of sodium sulphate ponds was detected.</p>

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Assessment of the changes in surface area and shoreline using RS and GIS: a case study of Lake Acıgöl in western Türkiye from 1984 to 2024

  • 期刊论文

  • 发表日期：

    2025年12月16日

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  • M. M. Kale,
  • N. Duman,
  • M. Erişmiş

摘要

Lake Acıgöl, one of the world’s leading natural sodium sulfate (thenardite) production sites, hosts numerous endemic species due to its unique ecosystem characteristics. As a crucial stopover for migratory birds, Acıgöl is currently facing the threat of extinction. This situation poses a significant risk to the lake’s unique ecosystem and its endemic species. This study investigates the water body changes and shoreline retreat rate of Acıgöl, the world's second-largest alkaline lake, which is formed by natural sodium sulfate (thenardite) deposition. In the study, datasets obtained using Remote Sensing (RS) technology were analyzed in detail through Geographic Information Systems (GIS). The Modified Normalized Difference Water Index (MNDWI) was employed to determine the spatial changes in the lake’s water body, while the Digital Shoreline Analysis System (DSAS) was used to calculate the shoreline retreat rate. At the end of the 41-year study period, it was determined that the lake’s water body had undergone a spatial change of 81.91%. Additionally, a shoreline retreat of over nine kilometers was observed on the western side of Lake Acıgöl, with the shoreline retreat rate calculated at 200.38 m/year. Despite the spatial reduction in the lake water body, a twenty-nine-fold increase in the area of sodium sulphate ponds was detected.