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  4. New insights into saline water evaporation from porous media: Complex interaction between evaporation rates, precipitation, and surface temperature
 
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New insights into saline water evaporation from porous media: Complex interaction between evaporation rates, precipitation, and surface temperature

Publikationstyp
Journal Article
Date Issued
2017-06-16
Sprache
English
Author(s)
Shokri-Kuehni, Salomé M. S.  
Vetter, Thomas  
Webb, Colin  
Shokri, Nima  
TORE-URI
http://hdl.handle.net/11420/10654
Journal
Geophysical research letters  
Volume
44
Issue
11
Start Page
5504
End Page
5510
Citation
Geophysical Research Letters 44 (11): 5504-5510 (2017-06-16)
Publisher DOI
10.1002/2017GL073337
Scopus ID
2-s2.0-85020113629
Understanding salt transport and deposition patterns during evaporation from porous media is important in many engineering and hydrological processes such as soil salinization, ecosystem functioning, and land-atmosphere interaction. As evaporation proceeds, salt concentration increases until it exceeds solubility limits, locally, and crystals precipitate. The interplay between transport processes, crystallization, and evaporation influences where crystallization occurs. During early stages, the precipitated salt creates an evolving porous structure affecting the evaporation kinetics. We conducted a comprehensive series of experiments to investigate how the salt concentration and precipitation influence evaporation dynamics. Our results illustrate the contribution of the evolving salt crust to the evaporative mass losses. High-resolution thermal imaging enabled us to investigate the complex temperature dynamics at the surface of precipitated salt, providing further confirmation of salt crust contribution to the evaporation. We identify different phases of saline water evaporation from porous media with the corresponding dominant mechanisms in each phase and extend the physical understanding of such processes.
Subjects
evaporation rate
saline water evaporation
salt precipitation
thermal imaging
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