Lancaster EPrints

Estimation of evapotranspiration at the landscape scale: a fuzzy disaggregation approach.

Franks, Stewart W. and Beven, Keith J. (1997) Estimation of evapotranspiration at the landscape scale: a fuzzy disaggregation approach. Water Resources Research, 33 (12). pp. 2929-2938. ISSN 0043-1397

Full text not available from this repository.

Abstract

This paper presents a methodology for the representation of variability in land surface fluxes across a given domain. Landsat thematic mapper (TM) data are employed to estimate the pixel-scale variability of the energy partition at the time of a TM overpass. Multiple realizations of the TOPUP soil vegetation-atmosphere transfer (SVAT) model are run deductively to define a space of model responses over a longer period of time. This allows the models to be classified into different functional types. The uncertain pixel estimates are then used to condition or map the estimates of the local landscape fluxes into the space of model functional types using fuzzy measures. The identified fuzzy weights may then be employed to derive time series of the mean areal latent heat flux and quantiles to represent the range of the flux variability. This scheme has the advantages that the resulting model is simple enough to be used directly as a representation of a heterogeneous land surface in an atmospheric model and that the fuzzy weights may be updated with additional data.

Item Type: Article
Journal or Publication Title: Water Resources Research
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Arts & Social Sciences > Politics & International Relations (Merged into PPR 2010-08-01)
Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 21918
Deposited By: ep_ss_importer
Deposited On: 11 Feb 2009 13:22
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 15:53
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/21918

Actions (login required)

View Item