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Publications
Publications (24)
Three-dimensional (3D) data from airborne laser scanning (ALS) and, more recently, digital aerial photogrammetry (DAP) have been successfully used to model forest attributes. While multi-temporal, wall-to-wall ALS data is not usually available, aerial imagery is regularly acquired in many regions. Thus, the combination of ALS and DAP data provide a...
Previous research has demonstrated that remote sensing can provide spectral information related to vegetation moisture variations essential for estimating live fuel moisture content (LFMC), but accuracy and timeliness still present challenges to using this information operationally. Consequently, many regional administrations are investing importan...
El incremento de los efectos negativos del cambio climático y la aparición de especies invasoras en los bosques de todo el mundo requieren el desarrollo de métodos innovadores para monitorear y medir cuantitativamente el estado de salud de las masas arboladas. Estos efectos son especialmente notables en el área mediterránea, donde el decaimiento de...
p>The increasing negative effects of climate change and the emergence of invasive species in forests around the world require the development of innovative methods to monitor and quantitatively measure the health status of woodlands. These effects are especially notable in the Mediterranean area, where the decline of stands due to recurrent drought...
Existe una creciente alarma en el sector agroforestal por la incidencia de plagas y enfermedades que llegan a devastar masas forestales, lo que está motivando que algunos estados miembros de la Unión Europea estén invirtiendo en diferentes estudios para detectar de forma temprana plagas y enfermedades forestales. Hoy en día se dispone de métodos in...
Due to the increasing importance of mangroves in climate change mitigation projects, more accurate and cost-effective aboveground biomass (AGB) monitoring methods are required. However, field measurements of AGB may be a challenge because of their remote location and the difficulty to walk in these areas. This study is based on the Livelihoods Fund...
La fiabilidad del LiDAR en la estimación de carbono está ampliamente demostrada,
sin embargo, sus resultados tienen una componente estática ligada a la fecha del
vuelo. Esta limitación es especialmente problemática en un territorio con un sector
forestal tan dinámico como Vizcaya. Nuestro objetivo ha sido obtener una medición
actualizada del conten...
Due to the increasing importance of mangroves in climate change mitigation projects, more accurate and cost-effective aboveground biomass (AGB) monitoring methods are required. However, field measurement of AGB may be a challenge because of its remote location and the difficulty to walk in these areas. This study is based on the Livelihoods Fund’ O...
behaviour. Reliable and updated estimations of LFMC are needed by fire managers for operational wildfire risk assessment. However, detailed and constant monitoring of LFMC in the field is costly and time-consuming. Remote sensing technologies are an important source of geospatial data that can provide spectral information related to LFMC at differe...
Live fuel moisture content is a major driver of wildfire behavior, and a key component in fire danger rating systems. Due to climate change, Mediterranean countries are suffering more frequent extreme weather conditions and an extension of fire season along the year. Therefore, public administrations in Spain are investing important amounts of reso...
Airborne laser scanning (ALS) is commonly used in forest mapping. Full coverage of ALS is already available in some countries to provide high-detailed terrain elevation models. These kinds of data sets have been shown to offer great potential in forest mapping. However, it presents some drawbacks such as the resampling periods may be longer than re...
Many countries have employed recently developed technologies, such as airborne lidar, to capture nationwide three-dimensional information over the past few years. In Spain, a huge volume of lidar information is available for the majority of the territory in the Spanish National Plan of Aerial Orthophotography. In this article, a multi-source approa...
This study analyzes the regeneration of burned forest areas in Garajonay National Park (La Gomera,
Canary Islands). In August 2012, a large fire burned 1,870 ha in the Garajonay National Park and surrounding areas. About 750 ha were burned in the National Park. High spatial resolution images, aerial and Pleiades satellite images, were acquired imme...
A large wildfire in La Gomera (Canary Islands, Spain) burned more than 1,800 ha of Garajonay National Park in 2012. Landsat-7 images were used to calculate four spectral indices (dNBR, RdNBR, RBR and dBAIM) and generate fire severity maps according to threshold values defining discrete severity levels. The performance of the fire severity indices w...
REDD+ implementation requires robust, consistent, accurate and transparent national land cover historical data and monitoring systems. Satellite imagery is the only data source with enough periodicity to provide consistent land cover information in a cost-effective way. The main aim of this paper is the creation of an operational framework for moni...
Resumen: El principal objetivo de este trabajo es llevar a cabo el análisis de la regeneración de ecosistemas forestales afectados por el incendio ocurrido en La Gomera en el año 2012. El incendio afectó a 1.870 ha de Parque y Zona Periférica del Parque Nacional de Garajonay, siendo 700 ha zonas de Parque Nacional afectadas. Para ello se ha evaluad...
This letter outlines a method for quantifying the fraction of intercepted photosynthetically active radiation (fIPAR) from high spatial resolution airborne images acquired from an unmanned aerial vehicle. Airborne campaigns provided imagery of peach and citrus orchards using a six-band multispectral camera with 15-cm resolution. At the time of the...
Chlorophyll a+b (Ca+b) and carotenoids (Cx+c) are leaf pigments associated with photosynthesis, participation in light harvesting and energy transfer, quenching and photoprotection. This manuscript makes progress on developing methods for leaf carotenoid content estimation, using high resolution hyperspectral imagery acquired from an unmanned aeria...
This study was conducted to estimate the fraction of Intercepted Photosinthetically Active Radiation (fIPAR) in an olive orchard. The method proposed to estimate fIPAR in olive canopies consisted of a coupled radiative transfer model that linked the 3D Forest Light Interaction Model (FLIGHT) and the Orchard Radiation Interception Model (ORIM). This...
Export Date: 26 October 2012, Source: Scopus, CODEN: PREAF, doi: 10.1007/s11119-012-9263-8, Language of Original Document: English, Correspondence Address: Zarco-Tejada, P. J.; Instituto de Agricultura Sostenible (IAS), Consejo Superior de Investigaciones Científicas (CSIC), Alameda del Obispo, s/n, 14004 Córdoba, Spain; email: pzarco@ias.csic.es,...
This paper deals with the monitoring of water status and the assessment of the effect of stress on citrus fruit quality using structural and physiological remote sensing indices. Four flights were conducted over a citrus orchard in 2009 using an unmanned aerial vehicle (UAV) carrying a multispectral camera with six narrow spectral bands in the visi...
Irrigation uses more than 70% of all water diverted to various uses worldwide. In the Mediterranean region, due to the limited rainfall and the erratic distribution within the year, irrigation of crops is essential to ensure high yields. The increase in water demand from other users coupled with wáter scarcity is leading to the reduction in the amo...
Recibido el 08 de marzo de 2010, aceptado el 10 de mayo de 2010 RESUMEN En este trabajo se llevó a cabo la validación del modelo 3D de transferencia radiativa FLIGHT para la estimación de la fracción de radiación fo-tosintéticamente activa interceptada (fIPAR) en cubiertas heterogéneas. El modelo permite si-mular cubiertas de tipo discontinuo evalu...
