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Analysis of Changes in Area and Water Quality of Wetlands in the Godarchay Watershed
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Mohammad Koohani   , Javad Behmanesh * , Vahid Rezaverdinejad |
| Urmia University |
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Abstract: (10 Views) |
| This study examines the changes in the area and water quality of both permanent and seasonal wetlands over a 34-year period, highlighting their sensitivity to climate change and human activities. Wetlands, vital for regulating the water cycle and supporting biodiversity, have seen a significant reduction in area and water quality in recent decades. Satellite images from Landsat 5, 7, and Sentinel-2, with high spatial resolution, were used to generate land use maps, processed with ArcGIS Pro and ENVI software. The analysis utilized advanced techniques such as SVM, Markov, and CA-Markov models. Water quality data from 2021 to 2024 in permanent wetlands were analyzed, focusing on parameters such as TSS, NO₃, PO₄²⁻, pH, TDS, COD, BOD₅, and EC. The results indicate a notable increase in water bodies and orchards, expanding from 348.77 square kilometers in 1990 to 634.20 square kilometers in 2024, with a predicted rise to 722.90 square kilometers by 2030. Conversely, rangelands decreased from 1498.13 square kilometers in 1990 to 1037.06 square kilometers in 2024, expected to further reduce to 938.30 square kilometers by 2030. Rainfed lands remained relatively stable, while seasonal wetlands exhibited more fluctuations than permanent ones. The study also revealed that seasonal wetlands like Yadegarlu and Taleghan experienced significant reductions during dry years, whereas permanent wetlands such as Agh-Gol and Dargeh-Sangi showed greater stability. These findings underscore the importance of effective water resource management and planning, particularly during drought periods, to ensure the protection and sustainability of wetlands. |
Article number: 7 |
| Keywords: Land use change, Wetland monitoring, Human impacts, Water resource management |
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Type of Study: Research |
Subject:
Special
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