Observatorio de I+D+i UPM

Memorias de investigación
Book chapters:
Evapotranspiration of partially vegetated surfaces from remote sensing
Year:2013
Research Areas
  • Agriculture,
  • Remote sensing,
  • Processing and signal analysis
Information
Abstract
Evapotranspiration (ET) estimates are required for many applications in agricultural and environmental management, from hydrological applications to crop models and irrigation scheduling. Improvement in irrigation water management is achieved when crop water use is accurately quantified in time and space. Conventionally, ET can be measured using Bowen ratio energy balance systems, eddy covariance systems, surface renewal systems, weighing lysimeters and sap flows, among others. Although these techniques can provide accurate estimates of ET over a homogeneous area, they are mainly based on site measurements that are local, and cannot represent the spatial variability of ET within a field or region. Satellite data are ideally suited for deriving spatially continuous fields of ET using energy balance techniques. However for partially vegetated surfaces (i.e. orchards), the use of those techniques has been limited due to the low spatial resolution obtained from some type of sensors at the satellite platform, that difficult its utilization at a farm level. Here, the use of methodologies of images fusion that integrate information from different sensors, offer an opportunity to achieve a characterization with more detail that consistently can be used at a farm level. The main goal of this study is to evaluate the performance of a surface energy balance (SEB) model and an image fusion algorithm to estimate ET for partially vegetated surfaces. Special interest is focused in instantaneous and daily evapotranspiration. Surface energy fluxes calculated with a SEB model from both original and fused images are compared with Eddy Covariance measurements made over a blueberry and cherry orchard fields.
International
Si
Book Edition
1
Book Publishing
IOS PRESS
ISBN
978-88-89693-34-6
Series
European Association of Remote Sensing Laboratories Proceedings
Book title
Towards Horizon 2020: Earth Observation and Social Perspectives
From page
613
To page
624
Participants
  • Autor: Octavio Lagos (U. de Concepción)
  • Autor: Mario Fernando Lillo Saavedra (UPM)
  • Autor: David Fonseca (U de Concepción)
  • Autor: Consuelo Gonzalo Martin (UPM)
Research Group, Departaments and Institutes related
  • Creador: Departamento: Arquitectura y Tecnología de Sistemas Informáticos
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)