Estimating cereal evapotranspiration using a simple model driven by satellite data

Author

Duchemin, B. ; Er-Raki, S. ; Gentine, P. ; Maisongrande, P. ; Coret, L. ; Boulet, G. ; Rodriguez, J.-C. ; Simonneaux, V. ; Chehbouni, A. ; Dedieu, G. ; Guemouria, N.

Author_Institution

Centre D´´Etudes Spatiales de la Biosphere, Toulouse, France

Volume

4

fYear

2003

fDate

21-25 July 2003

Firstpage

2762

Abstract

The SUD-MED project aims at monitoring water resources over Mediterranean regions. As part of the project, this paper presents a method we developed for estimating cereal water requirement. The method consists in driving the simple model developed by the FAO with remotely-sensed data. It was tested on an little area cultivated with wheat in the semi-arid Marrakech plain (Morocco). We use a time series of high spatial resolution images acquired by SPOT-4/HRVIR during the 2001/2002 agricultural season. The method outlines the spatio-temporal patterns of crop cycles. The associated maps of phenological variables and seasonal evapotranspiration appear consistent with regional rainfall and irrigation features. Perspectives of improvement are finally discussed.

Keywords

crops; evaporation; hydrological techniques; irrigation; rain; remote sensing; time series; transpiration; water resources; AD 2001 to 2002; Mediterranean region; Morocco; SUD-MED project; crop cycles; evapotranspiration; food-agriculture organization; high spatial resolution images; phenological variable; rainfall; remotely sensed data; satellite data; seasonal evapotranspiration; semiarid Marrakech plain; spatiotemporal patterns; water resources; Crops; Cultural differences; Image analysis; Image sensors; Irrigation; Monitoring; Satellites; Spatial resolution; Testing; Water resources;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium, 2003. IGARSS '03. Proceedings. 2003 IEEE International

Print_ISBN

0-7803-7929-2

Type

conf

DOI

10.1109/IGARSS.2003.1294577

Filename

1294577