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Article

The Gavkhouni Wetland Dryness and Its Impact on Air Temperature Variability in the Eastern Part of the Zayandeh-Rud River Basin, Iran

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Department of Physical Geography, Faculty of Geographical Sciences and Planning, University of Isfahan, Isfahan 8174673441, Iran
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Department of Geography, School of Social Sciences, Faculty of Arts and Science, Capilano University, North Vancouver, BC V7J 3H5, Canada
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Department of Water Engineering, Faculty of Agriculture, Shahrekord University, Shahrekord 8818634141, Iran
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Department of Natural Resources, Isfahan University of Technology, Isfahan 8415683111, Iran
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Department of Geodesy and Geoinformation, Technische Universität Wien, Wiedner Hauptstrasse 8–10, 1040 Vienna, Austria
*
Author to whom correspondence should be addressed.
Academic Editor: Zongming Wang
Water 2022, 14(2), 172; https://doi.org/10.3390/w14020172
Received: 9 November 2021 / Revised: 18 December 2021 / Accepted: 29 December 2021 / Published: 9 January 2022
(This article belongs to the Section Hydrology)
The Gavkhouni wetland provides many environmental and economic benefits for the central region of Iran. In recent decades, it has completely dried up several times with substantial impacts on local ecosystems and climate. Remote sensing-based Land Surface Temperature (LST), Normalized Difference Water Index (NDWI) and Normalized Difference Vegetation Index (NDVI) in combination with in-situ data were used to investigate the trend of the Gavkhouni wetland dryness and the associated impact on the variability of local air temperature. The results indicate that the wetland has increasingly experienced drier conditions since the year 2000. The wetland was almost completely dry in 2009, 2011, 2015 and 2017. In addition, the results show that Gavkhouni wetland dryness has a significant impact on local climate, increasing the mean seasonal air temperature by ~1.6 °C and ~1 °C in spring and summer, respectively. Overall, this study shows that remote sensing imagery is a valuable source for monitoring dryness and air temperature variations in the region. Moreover, the results provide a basis for effective water allocation decisions to maintain the hydrological and ecological functionality of the Gavkhouni wetland. Considering that many factors such as latitude, cloud cover, and the direction of prevailing winds affect land surface and air temperatures, it is suggested to use a numerical climate model to improve a regional understanding of the effects of wetland dryness on the surrounding climate. View Full-Text
Keywords: remote sensing; trend; land surface temperature (LST); NDWI; NDVI; local climate remote sensing; trend; land surface temperature (LST); NDWI; NDVI; local climate
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MDPI and ACS Style

Azadi, S.; Yazdanpanah, H.; Nasr-Esfahani, M.A.; Pourmanafi, S.; Dorigo, W. The Gavkhouni Wetland Dryness and Its Impact on Air Temperature Variability in the Eastern Part of the Zayandeh-Rud River Basin, Iran. Water 2022, 14, 172. https://doi.org/10.3390/w14020172

AMA Style

Azadi S, Yazdanpanah H, Nasr-Esfahani MA, Pourmanafi S, Dorigo W. The Gavkhouni Wetland Dryness and Its Impact on Air Temperature Variability in the Eastern Part of the Zayandeh-Rud River Basin, Iran. Water. 2022; 14(2):172. https://doi.org/10.3390/w14020172

Chicago/Turabian Style

Azadi, Sara, Hojat Yazdanpanah, Mohammad A. Nasr-Esfahani, Saeid Pourmanafi, and Wouter Dorigo. 2022. "The Gavkhouni Wetland Dryness and Its Impact on Air Temperature Variability in the Eastern Part of the Zayandeh-Rud River Basin, Iran" Water 14, no. 2: 172. https://doi.org/10.3390/w14020172

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