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Consistency between hydrological model, large aperture scintillometer and remote sensing based evapotranspiration estimates for a heterogeneous catchment

Bruno Samain UGent, Gijs WH Simons, Maurits P Voogt, Willem Defloor, Niek-Jan Bink and Valentijn Pauwels UGent (2012) HYDROLOGY AND EARTH SYSTEM SCIENCES. 16(7). p.2095-2107
abstract
The catchment averaged actual evapotranspiration rate is a hydrologic model variable that is difficult to quantify. Evapotranspiration rates - up till present - cannot be continuously observed at the catchment scale. The objective of this paper is to estimate the evapotranspiration rates (or its energy equivalent, the latent heat fluxes LE) for a heterogeneous catchment of 102.3 km(2) in Belgium using three fundamentally different algorithms. One possible manner to observe this variable could be the continuous measurement of sensible heat fluxes (H) across large distances (in the order of kilometers) using a large aperture scintillometer (LAS), and converting these observations into evapotranspiration rates. Latent heat fluxes are obtained through the energy balance equation using a series of sensible heat fluxes measured with a LAS over a distance of 9.5 km in the catchment, and point measurements of net radiation (R-n) and ground heat flux (G) upscaled to catchment average through the use of TOPLATS, a physically based land surface model. The resulting LE-values are then compared to results from the remote sensing based surface energy balance algorithm ETLook and the land surface model. Firstly, the performance of ETLook for the energy balance terms has been assessed at the point scale and at the catchment scale. Secondly, consistency between daily evapotranspiration rates from ETLook, TOPLATS and LAS is shown.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
FLUXES, SURFACE, HEAT, WATER, MEXICO
journal title
HYDROLOGY AND EARTH SYSTEM SCIENCES
Hydrol. Earth Syst. Sci.
volume
16
issue
7
pages
2095 - 2107
Web of Science type
Article
Web of Science id
000306976200018
JCR category
WATER RESOURCES
JCR impact factor
3.587 (2012)
JCR rank
2/80 (2012)
JCR quartile
1 (2012)
ISSN
1027-5606
DOI
10.5194/hess-16-2095-2012
language
English
UGent publication?
yes
classification
A1
copyright statement
I have retained and own the full copyright for this publication
id
2962787
handle
http://hdl.handle.net/1854/LU-2962787
date created
2012-07-13 13:21:48
date last changed
2012-09-26 11:56:01
@article{2962787,
  abstract     = {The catchment averaged actual evapotranspiration rate is a hydrologic model variable that is difficult to quantify. Evapotranspiration rates - up till present - cannot be continuously observed at the catchment scale. 
The objective of this paper is to estimate the evapotranspiration rates (or its energy equivalent, the latent heat fluxes LE) for a heterogeneous catchment of 102.3 km(2) in Belgium using three fundamentally different algorithms. 
One possible manner to observe this variable could be the continuous measurement of sensible heat fluxes (H) across large distances (in the order of kilometers) using a large aperture scintillometer (LAS), and converting these observations into evapotranspiration rates. Latent heat fluxes are obtained through the energy balance equation using a series of sensible heat fluxes measured with a LAS over a distance of 9.5 km in the catchment, and point measurements of net radiation (R-n) and ground heat flux (G) upscaled to catchment average through the use of TOPLATS, a physically based land surface model. 
The resulting LE-values are then compared to results from the remote sensing based surface energy balance algorithm ETLook and the land surface model. Firstly, the performance of ETLook for the energy balance terms has been assessed at the point scale and at the catchment scale. Secondly, consistency between daily evapotranspiration rates from ETLook, TOPLATS and LAS is shown.},
  author       = {Samain, Bruno and Simons, Gijs WH and Voogt, Maurits P and Defloor, Willem and Bink, Niek-Jan and Pauwels, Valentijn},
  issn         = {1027-5606},
  journal      = {HYDROLOGY AND EARTH SYSTEM SCIENCES},
  keyword      = {FLUXES,SURFACE,HEAT,WATER,MEXICO},
  language     = {eng},
  number       = {7},
  pages        = {2095--2107},
  title        = {Consistency between hydrological model, large aperture scintillometer and remote sensing based evapotranspiration estimates for a heterogeneous catchment},
  url          = {http://dx.doi.org/10.5194/hess-16-2095-2012},
  volume       = {16},
  year         = {2012},
}

Chicago
Samain, Bruno, Gijs WH Simons, Maurits P Voogt, Willem Defloor, Niek-Jan Bink, and Valentijn Pauwels. 2012. “Consistency Between Hydrological Model, Large Aperture Scintillometer and Remote Sensing Based Evapotranspiration Estimates for a Heterogeneous Catchment.” Hydrology and Earth System Sciences 16 (7): 2095–2107.
APA
Samain, B., Simons, G. W., Voogt, M. P., Defloor, W., Bink, N.-J., & Pauwels, V. (2012). Consistency between hydrological model, large aperture scintillometer and remote sensing based evapotranspiration estimates for a heterogeneous catchment. HYDROLOGY AND EARTH SYSTEM SCIENCES, 16(7), 2095–2107.
Vancouver
1.
Samain B, Simons GW, Voogt MP, Defloor W, Bink N-J, Pauwels V. Consistency between hydrological model, large aperture scintillometer and remote sensing based evapotranspiration estimates for a heterogeneous catchment. HYDROLOGY AND EARTH SYSTEM SCIENCES. 2012;16(7):2095–107.
MLA
Samain, Bruno, Gijs WH Simons, Maurits P Voogt, et al. “Consistency Between Hydrological Model, Large Aperture Scintillometer and Remote Sensing Based Evapotranspiration Estimates for a Heterogeneous Catchment.” HYDROLOGY AND EARTH SYSTEM SCIENCES 16.7 (2012): 2095–2107. Print.