EGU23-7767, updated on 25 Feb 2023
https://doi.org/10.5194/egusphere-egu23-7767
EGU General Assembly 2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Simulating Evapotranspiration in Green roofs using a Multifractal approach

Arun Ramanathan S1, Pierre-Antoine Versini1, Daniel Schertzer1, Ioulia Tchiguirinskaia1, Remi Perrin2, and Lionel Sindt2
Arun Ramanathan S et al.
  • 1Hydrology Meteorology and Complexity Laboratory, École des ponts, Champs-sur-Marne, France (arun.ramanathan@enpc.fr)
  • 2SOPREMA, 14 Rue de Saint-Nazaire, 67025 Strasbourg, France.

Abstract

Several equations and their simplified versions already exist for estimating evapotranspiration. Still, the practical difficulty in using them is that they contain too many variables and empirical parameters including some non-atmospheric vegetation-based ones which may not be appropriate for all plant types. Therefore, a simple empirical equation is suggested here to approximately estimate evapotranspiration loss in a deterministic manner as a function of the green roof’s water content, ambient air temperature, wind speed, relative humidity, and total net radiation flux. For nonlinear processes such as evapotranspiration clearly, such deterministic estimates are not representative of the extreme values observed in evapotranspiration losses. Therefore, a universal multifractal-based simulation procedure is proposed here to improve such deterministic estimates, so that the simulated evapotranspiration loss has realistic intermittency and temporal scaling behaviour, while preserving its diurnal variability.

 

Keywords

Multifractals, Non-linear geophysical systems, Cascade dynamics, Scaling, Hydrology, Meteorology.

 

How to cite: Ramanathan S, A., Versini, P.-A., Schertzer, D., Tchiguirinskaia, I., Perrin, R., and Sindt, L.: Simulating Evapotranspiration in Green roofs using a Multifractal approach, EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-7767, https://doi.org/10.5194/egusphere-egu23-7767, 2023.