Reference : Importance of temporal variability for hydrological predictions based on the maximum ...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
http://hdl.handle.net/2268/177242
Importance of temporal variability for hydrological predictions based on the maximum entropy production principle
English
Westhoff, Martijn mailto [Université de Liège - ULiège > Département ArGEnCo > Hydraulics in Environmental and Civil Engineering >]
Zehe, Erwin [> >]
Schymanski, Stanislaus J. [> >]
2014
Geophysical Research Letters
n/a--n/a
Yes (verified by ORBi)
International
0094-8276
1944-8007
[en] maximum entropy production ; thermodynamics ; influence of temporal dynamics
[en] This work builds on earlier work by Kleidon and Schymanski (2008) who explored the use of the maximum entropy production (MEP) principle for modeling hydrological systems. They illustrated that MEP can be used to determine the partitioning of soil water into runoff and evaporation—which determines hydroclimatic conditions around the Globe—by optimizing effective soil and canopy conductances in a way to maximize entropy production by these fluxes. In the present study, we show analytically that under their assumption of constant rainfall, the proposed principle always yields an optimum where the two conductances are equal, irrespective of rainfall rate, evaporative demand, or gravitational potential. Subsequently, we show that under periodic forcing or periodic variations in one resistance (e.g., vegetation seasonality), the optimal conductance does depend on climatic drivers such as the length of dry spells or the time of closure of stomata.
http://hdl.handle.net/2268/177242
10.1002/grl.51233
http://dx.doi.org/10.1002/grl.51233

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