Influence of dyke-type causeway on Urmia Lake (NW Iran); insights from water physico-chemical parameters seasonal (2019) changes

Ali Mohammadi*, Georg Schwamborn, Amaneh Kaveh-Firouz, Attila Çiner, Razyeh Lak, Alireza Salehipour Milani, Demet Biltekin

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1 Atıf (Scopus)

Özet

The Urmia Lake in NW Iran, the world's second-largest hypersaline lake, has been exposed to rapid water level fall in the last two decades due to water resources mismanagement, building up of dams on inlet rivers, and the causeway construction in the lake. This human intervention has divided the lake into northern and southern parts and caused an extreme disturbance in the hydro-chemical and hydrodynamic systems, namely current direction reversal. To fully understand the current situation, water depth and lake surface and deepwater physico-chemical parameters (i.e. density, temperature, acidity, electrical conductivity, and total dissolved solids) are analysed in the wet and dry seasons of 2019. In the wet season, deepwaters have a higher density than surface waters, and the northern part of the lake contains denser water compared to its southern counterpart. The formation of density gradients creates an anticlockwise direction lake current. Deepwaters show higher electrical conductivity and total dissolved solids than surface waters in the wet season. Unlike the wet season, the lake water becomes more homogenised due to wave action and evaporation in the dry season. Our study clearly demonstrates that the water passageway of the causeway does not allow for a complete yearly balance between water and sediment exchange. Results suggest that the northern and southern parts of the lake have almost independent hydro-chemical and hydrodynamic systems. In the undeniable reality of global warming trends, anthropogenic interventions into sensible ecologic systems need to be better planned if we were to prevent the ecological disasters we now have to face.

Orijinal dilİngilizce
Sayfa (başlangıç-bitiş)1-14
Sayfa sayısı14
DergiJournal of Hydro-Environment Research
Hacim47
DOI'lar
Yayın durumuYayınlandı - Mar 2023

Bibliyografik not

Publisher Copyright:
© 2023 International Association for Hydro-environment Engineering and Research, Asia Pacific Division

Finansman

This work was funded by Istanbul Technical University (ITÜ)/BAP project (grant number MGA-2022-43659). The authors thank the Research Institute for Earth Science and Geological Survey of Iran (Tabriz and Urmia branches) for logistic support during fieldwork. Salar Mehran, Mehdi Mohammadi, and Abdol-Hamid Sartipi are thanked for their help during sampling. Thanks are also due to Javad Darvishi Khatouni, Najmeh Davari, Mojgan-Saadat Shoushtarian, Elnaz Aghaali, and Fatemeh Ataherian for their support on sample processing and water physico-chemical parameters measurement. We also greatly appreciate the associated editor and two anonymous reviewers’ comments that improved the quality of our manuscript. This work was funded by Istanbul Technical University (ITÜ)/BAP project (grant number MGA-2022-43659). The authors thank the Research Institute for Earth Science and Geological Survey of Iran (Tabriz and Urmia branches) for logistic support during fieldwork. Salar Mehran, Mehdi Mohammadi, and Abdol-Hamid Sartipi are thanked for their help during sampling. Thanks are also due to Javad Darvishi Khatouni, Najmeh Davari, Mojgan-Saadat Shoushtarian, Elnaz Aghaali, and Fatemeh Ataherian for their support on sample processing and water physico-chemical parameters measurement. We also greatly appreciate the associated editor and two anonymous reviewers’ comments that improved the quality of our manuscript.

FinansörlerFinansör numarası
İTÜMGA-2022-43659
Javad Darvishi Khatouni
Research Institute for Earth Science and Geological Survey of Iran
Tabriz and Urmia branches
Istanbul Teknik Üniversitesi

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