Ten Year Analysis of Land Use Changes in the Urmia Lake Basin and Their Relationship with Water Level Variations (Using Landsat 8 and 9 Imagery)

Document Type : Article extracted from thesis

Authors

Department of Environmental Science, Faculty of Marine Science and Technology, Islamic Azad University, North Tehran Branch, Tehran, Iran

Abstract
Over the past decades, the Urmia Lake basin has experienced extensive land use changes accompanied by a severe decline in water level. This situation highlights the necessity of scientifically analyzing land use dynamics and proposing management patterns compatible with environmental sustainability. The objective of this study is to investigate ten year land use changes in the Urmia Lake basin (2013–2023) using Landsat 8 and Landsat 9 imagery and to propose an optimal land use pattern aimed at reducing environmental hazards. For this purpose, satellite images were subjected to geometric and atmospheric corrections and subsequently classified into four main classes using the supervised Maximum Likelihood Classification algorithm. Classification accuracy was evaluated using an error matrix, overall accuracy, and the Kappa coefficient, yielding an accuracy greater than 90%. Subsequently, the spatial pattern and areal changes of each land use class during the study period were analyzed and compared with the trend of lake water level decline. The results indicate that the significant expansion of agricultural lands and human built areas coincides with a substantial reduction in water bodies. This simultaneity suggests that land use changes have played a significant role in intensifying the lake desiccation crisis. To derive an optimal land use pattern, relevant spatial layers were standardized and integrated within a Geographic Information System (GIS) environment. Using the Site Selection function and a suitability threshold of ≥ 60%, a final proposed land use map was generated. According to this map, agricultural lands cover 563.51 km², water bodies occupy 345.29 km², human built areas account for 152.56 km², and other land uses encompass 17,939.05 km² of the study area. The findings emphasize that integrated water resource management, adjustment of cropping patterns, and continuous monitoring of land use changes are essential for achieving ecological sustainability and supporting the restoration of Urmia Lake.

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Articles in Press, Accepted Manuscript
Available Online from 29 April 2026

  • Receive Date 20 February 2026
  • Revise Date 09 April 2026
  • Accept Date 27 April 2026
  • First Publish Date 29 April 2026
  • Publish Date 29 April 2026