Urban Water Storage Capacity Inferred From Observed Evapotranspiration Recession

Jongen, Harro J. and Steeneveld, Gert-Jan and Beringer, Jason and Christen, Andreas and Chrysoulakis, Nektarios and Fortuniak, Krzysztof and Hong, Jinkyu and Hong, Je-Woo and Jacobs, Cor M. J. and Järvi, Leena and Meier, Fred and Pawlak, Włodzimierz and Roth, Matthias and Theeuwes, Nathalie and Velasco, Erik and Vogt, Roland and Teuling, Adriaan J.. (2022) Urban Water Storage Capacity Inferred From Observed Evapotranspiration Recession. Geophysical Research Letters, 49 (3). e2021GL096069.

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Abstract Water storage plays an important role in mitigating heat and flooding in urban areas. Assessment of the water storage capacity of cities remains challenging due to the inherent heterogeneity of the urban surface. Traditionally, effective storage has been estimated from runoff. Here, we present a novel approach to estimate effective water storage capacity from recession rates of observed evaporation during precipitation-free periods. We test this approach for cities at neighborhood scale with eddy-covariance based latent heat flux observations from 14 contrasting sites with different local climate zones, vegetation cover and characteristics, and climates. Based on analysis of 583 drydowns, we find storage capacities to vary between 1.3 and 28.4Â mm, corresponding to e-folding timescales of 1.8âEuro"20.1Â days. This makes the urban storage capacity at least five times smaller than all the observed values for natural ecosystems, reflecting an evaporation regime characterized by extreme water limitation.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Ehemalige Einheiten Umweltwissenschaften > Meteorologie (Parlow)
05 Faculty of Science > Departement Umweltwissenschaften > Geowissenschaften > Atmospheric Sciences (Kalberer)
UniBasel Contributors:Vogt, Roland
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:25 Apr 2022 13:31
Deposited On:25 Apr 2022 13:31

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