Mapping canopy conductance and CWSI in olive orchards using high resolution thermal remote sensing imagery
JAJ Berni, PJ Zarco-Tejada, G Sepulcre-Canto, E Fereres, F Villalobos
REMOTE SENSING OF ENVIRONMENT | ELSEVIER SCIENCE INC | Published : 2009
The characterization of field properties related to water in heterogeneous open canopies is limited by the lack of spatial resolution of satellite-based imagery and by the physical constraints of point observations on the ground. We apply here models based on canopy temperature estimated from high resolution airborne imagery to calculate tree canopy conductance (Gc) and the crop water stress index (CWSI) of heterogeneous olive orchards. The Gc model requires the simulation of net radiation (Rn) and the aerodynamic resistance (ra) as a function of windspeed and canopy structure. In both cases, the Rn and ra models were tested against measurements and published data for olive orchards. Modeled..View full abstract
Awarded by Ministerio de Educacion y Ciencia (MEC) of Spain
Awarded by EXPLORA-INGENIO
Awarded by CONSOLIDER
This work was funded by the Ministerio de Educacion y Ciencia (MEC) of Spain with projects AGL-2003-01468, ACL2005-04049, EXPLORA-INGENIO AGL2006-26038-E/AGR, and CONSOLIDER CSD2006-67, as well as the junta de Andalucia - with project AGR595, and in-kind support provided by Bioiberica through project PETRI PET-2005-0616. Technical support from UAV Navigation and Tetracam Inc. for accommodating airborne requirements are also acknowledged. V. Gonzdlez, M. Morales, C. Ruz, D. Notario, M. Guillen, C. Trapero, I. Calatrava, A. Vera and M. Ruiz Bernier are acknowledged for measurements and technical support in field and airborne campaigns. Special thanks to Dr. Luca Testi for his comments and support.