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פותח על ידי קלירמאש פתרונות בע"מ -
Evaporation from three water bodies of different sizes and climates: Measurements and scaling analysis
Year:
2008
Source of publication :
Advances in Water Resources
Authors :
אסולין, שמואל
;
.
טנאי, יוסף
;
.
כהן, שבתאי
;
.
Volume :
31
Co-Authors:
Assouline, S., Institute of Soil, Water and Environmental Sciences, A.R.O. - Volcani Center, Bet Dagan, Israel
Tyler, S.W., Department of Geological Sciences and Engineering, University of Nevada, Reno, United States
Tanny, J., Institute of Soil, Water and Environmental Sciences, A.R.O. - Volcani Center, Bet Dagan, Israel
Cohen, S., Institute of Soil, Water and Environmental Sciences, A.R.O. - Volcani Center, Bet Dagan, Israel
Bou-Zeid, E., School of Architecture, Civil and Environmental Engineering, Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne, Switzerland
Parlange, M.B., School of Architecture, Civil and Environmental Engineering, Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne, Switzerland
Katul, G.G., Nicholas School of the Environment and Earth Sciences, Duke University, Durham, United States
Facilitators :
From page:
160
To page:
172
(
Total pages:
13
)
Abstract:
Evaporation from small reservoirs, wetlands, and lakes continues to be a theoretical and practical problem in surface hydrology and micrometeorology because atmospheric flows above such systems can rarely be approximated as stationary and planar-homogeneous with no mean subsidence (hereafter referred to as idealized flow state). Here, the turbulence statistics of temperature (T) and water vapor (q) most pertinent to lake evaporation measurements over three water bodies differing in climate, thermal inertia and degree of advective conditions are explored. The three systems included Lac Léman in Switzerland (high thermal inertia, near homogeneous conditions with no appreciable advection due to long upwind fetch), Eshkol reservoir in Israel (intermediate thermal inertia, frequent strong advective conditions) and Tilopozo wetland in Chile (low thermal inertia, frequent but moderate advection). The data analysis focused on how similarity constants for the flux-variance approach, CT/Cq, and relative transport efficiencies RwT/Rwq, are perturbed from unity with increased advection or the active role of temperature. When advection is small and thermal inertia is large, CT/Cq < 1 (or RwT/Rwq > 1) primarily due to the active role of temperature, which is consistent with a large number of studies conducted over bare soil and vegetated surfaces. However, when advection is significantly large, then CT/Cq > 1 (orRwT/Rwq < 1). When advection is moderate and thermal inertia is low, then CT/Cq ∼ 1. This latter equality, while consistent with Monin-Obukhov similarity theory (MOST), is due to the fact that advection tends to increase CT/Cq above unity while the active role of temperature tends to decrease CT/Cq below unity. A simplified scaling analysis derived from the scalar variance budget equation, explained qualitatively how advection could perturb MOST scaling (assumed to represent the idealized flow state). © 2007 Elsevier Ltd. All rights reserved.
Note:
Related Files :
evapotranspiration
hydrology
Lake evaporation
Lake Geneva
meteorology
Monin-Obukhov similarity theory
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/j.advwatres.2007.07.003
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
23686
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:01
Scientific Publication
Evaporation from three water bodies of different sizes and climates: Measurements and scaling analysis
31
Assouline, S., Institute of Soil, Water and Environmental Sciences, A.R.O. - Volcani Center, Bet Dagan, Israel
Tyler, S.W., Department of Geological Sciences and Engineering, University of Nevada, Reno, United States
Tanny, J., Institute of Soil, Water and Environmental Sciences, A.R.O. - Volcani Center, Bet Dagan, Israel
Cohen, S., Institute of Soil, Water and Environmental Sciences, A.R.O. - Volcani Center, Bet Dagan, Israel
Bou-Zeid, E., School of Architecture, Civil and Environmental Engineering, Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne, Switzerland
Parlange, M.B., School of Architecture, Civil and Environmental Engineering, Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne, Switzerland
Katul, G.G., Nicholas School of the Environment and Earth Sciences, Duke University, Durham, United States
Evaporation from three water bodies of different sizes and climates: Measurements and scaling analysis
Evaporation from small reservoirs, wetlands, and lakes continues to be a theoretical and practical problem in surface hydrology and micrometeorology because atmospheric flows above such systems can rarely be approximated as stationary and planar-homogeneous with no mean subsidence (hereafter referred to as idealized flow state). Here, the turbulence statistics of temperature (T) and water vapor (q) most pertinent to lake evaporation measurements over three water bodies differing in climate, thermal inertia and degree of advective conditions are explored. The three systems included Lac Léman in Switzerland (high thermal inertia, near homogeneous conditions with no appreciable advection due to long upwind fetch), Eshkol reservoir in Israel (intermediate thermal inertia, frequent strong advective conditions) and Tilopozo wetland in Chile (low thermal inertia, frequent but moderate advection). The data analysis focused on how similarity constants for the flux-variance approach, CT/Cq, and relative transport efficiencies RwT/Rwq, are perturbed from unity with increased advection or the active role of temperature. When advection is small and thermal inertia is large, CT/Cq < 1 (or RwT/Rwq > 1) primarily due to the active role of temperature, which is consistent with a large number of studies conducted over bare soil and vegetated surfaces. However, when advection is significantly large, then CT/Cq > 1 (orRwT/Rwq < 1). When advection is moderate and thermal inertia is low, then CT/Cq ∼ 1. This latter equality, while consistent with Monin-Obukhov similarity theory (MOST), is due to the fact that advection tends to increase CT/Cq above unity while the active role of temperature tends to decrease CT/Cq below unity. A simplified scaling analysis derived from the scalar variance budget equation, explained qualitatively how advection could perturb MOST scaling (assumed to represent the idealized flow state). © 2007 Elsevier Ltd. All rights reserved.
Scientific Publication
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