DOI: 10.5194/hess-20-479-2016
Scopus记录号: 2-s2.0-84956966784
论文题名: Does the Budyko curve reflect a maximum-power state of hydrological systems? A backward analysis
作者: Westhoff M ; , Zehe E ; , Archambeau P ; , Dewals B
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2016
卷: 20, 期: 1 起始页码: 479
结束页码: 486
语种: 英语
Scopus关键词: Catchments
; Evaporation
; Runoff
; Backward analysis
; Box models
; Hydrological system
; Mathematical formulation
; Maximum power
; Parameter calibration
; Steady state
; Top down approaches
; Curve fitting
; aridity
; calibration
; catchment
; estimation method
; evaporation
; future prospect
; hydrological modeling
; thermodynamic property
; top-down approach
英文摘要: Almost all catchments plot within a small envelope around the Budyko curve. This apparent behaviour suggests that organizing principles may play a role in the evolution of catchments. In this paper we applied the thermodynamic principle of maximum power as the organizing principle. In a top-down approach we derived mathematical formulations of the relation between relative wetness and gradients driving run-off and evaporation for a simple one-box model. We did this in an inverse manner such that, when the conductances are optimized with the maximum-power principle, the steady-state behaviour of the model leads exactly to a point on the asymptotes of the Budyko curve. Subsequently, we added dynamics in forcing and actual evaporation, causing the Budyko curve to deviate from the asymptotes. Despite the simplicity of the model, catchment observations compare reasonably well with the Budyko curves subject to observed dynamics in rainfall and actual evaporation. Thus by constraining the model that has been optimized with the maximum-power principle with the asymptotes of the Budyko curve, we were able to derive more realistic values of the aridity and evaporation index without any parameter calibration. Future work should focus on better representing the boundary conditions of real catchments and eventually adding more complexity to the model. © 2016 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78927
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Hydraulics in Environmental and Civil Engineering (HECE), University of Liege (ULg), Liege, Belgium; Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
Recommended Citation:
Westhoff M,, Zehe E,, Archambeau P,et al. Does the Budyko curve reflect a maximum-power state of hydrological systems? A backward analysis[J]. Hydrology and Earth System Sciences,2016-01-01,20(1)