Browsing by UPNA Author "Álvarez-Mozos, Jesús"
Now showing items 1-20 of 33
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Accuracy of methods for field assessment of rill and ephemeral gully erosion
To properly assess soil erosion in agricultural areas, it is necessary to determine precisely the volume of ephemeral gullies and rills in the field by using direct measurement procedures. However, little information is ... -
The added value of stratified topographic correction of multispectral images
Satellite images in mountainous areas are strongly affected by topography. Different studies demonstrated that the results of semi-empirical topographic correction algorithms improved when a stratification of land covers ... -
Analysis of surface roughness in agricultural soils using in-situ measurements and remote sensing techniques
El término rugosidad superficial del suelo es utilizado para describir las variaciones de elevación de la superficie del suelo (micro-relieve). La rugosidad afecta diferentes procesos hidrológicos importantes como el ... -
Automatic detection of high-voltage power lines in LiDAR surveys using data mining techniques
(Springer, 2020) Contribución a congreso / Biltzarrerako ekarpenaThe correct classification of power lines in LiDAR point clouds has attracted the interest of the mapping community in the last years. The objective of this research is the detection and automatic extraction of high-voltage ... -
Automatic detection of uprooted orchards based on orthophoto texture analysis
Permanent crops, such as olive groves, vineyards and fruit trees, are important in European agriculture because of their spatial and economic relevance. Agricultural geographical databases (AGDBs) are commonly used by ... -
Clasificación de cultivos a partir de observaciones de teledetección radar. Aplicación a zonas de secano y regadío de Navarra.
La teledetección consiste en adquirir a través de sensores de observación, información de un objeto concreto o un área. Una de las principales aplicaciones de la teledetección en el ámbito agrícola es la clasificación ... -
Clasificación de cultivos en la zona media de Navarra mediante imágenes radar polarimétricas
Navarra lleva años empleando la técnica de clasificación supervisada de imágenes multiespectrales de satélite para la realización de la estadística agraria. La cubierta nubosa, muy habitual en esta zona, limita e incluso ... -
Comparison of digital terrain models obtained with LiDAR and photogrammetry
(Springer, 2020) Contribución a congreso / Biltzarrerako ekarpenaAirborne LiDAR sensors capture three-dimensional information of the Earth, useful for obtaining high accuracy Digital Terrain Models (DTM). The Spanish National Plan for Aerial Orthophotography (PNOA) is an initiative of ... -
Crop classification based on temporal signatures of Sentinel-1 observations over Navarre province, Spain
Crop classification provides relevant information for crop management, food security assurance and agricultural policy design. The availability of Sentinel-1 image time series, with a very short revisit time and high spatial ... -
Desarrollo de productos avanzados para la misión SEOSAT/Ingenio
SEOSAT/Ingenio es la futura misión española de observación de la Tierra en el óptico en alta resolución espacial. Mientras que los productos de imagen a Nivel 1, radiancias geo-referenciadas a nivel de sensor, se encuentran ... -
Effect of topography on retreat rate of different gully headcuts in Bardenas Reales area (Navarre, Spain)
(Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007) Contribución a congreso / Biltzarrerako ekarpenaIn Northeast Spain, gullying is a widespread phenomenon. This type of erosion is especially intense in Bardenas Reales (Navarre) where at least two major typical kinds of gully headcut are present. A first group developed ... -
Effective roughness modelling as a tool for soil moisture retrieval from C-and L-band SAR
Soil moisture retrieval from Synthetic Aperture Radar (SAR) using state-of-the-art backscatter models is not fully operational at present, mainly due to difficulties involved in the parameterisation of soil surface ... -
Effects of spatial sampling interval on roughness parameters and microwave backscatter over agricultural soil surfaces
The spatial sampling interval, as related to the ability to digitize a soil profile with a certain number of features per unit length, depends on the profiling technique itself. From a variety of profiling techniques, ... -
Error in radar-derived soil moisture due to roughness parameterization: an analysis based on synthetical surface profiles
In the past decades, many studies on soil moisture retrieval from SAR demonstrated a poor correlation between the top layer soil moisture content and observed backscatter coefficients, which mainly has been attributed ... -
Evaluación de la aplicabilidad de la teledetección radar a la estimación de la humedad superficial del suelo en cuencas agrícolas
En esta tesis doctoral se aborda el tema de la estimación de la humedad superficial del suelo mediante teledetección radar. La humedad superficial del suelo es una variable que interviene en multitud de procesos que tienen ... -
Evaluación multitemporal de métodos de corrección topográfica mediante el uso de imágenes sintéticas multiespectrales
En este trabajo se presentan los resultados de la evaluación multitemporal de varios métodos de corrección topográfica (TOC), cuya bondad se determina de forma cuantitativa mediante el uso de imágenes sintéticas multiespectrales ... -
Evaluation of 2D models for the prediction of surface depression storage using realistic reference values
Depression storage (DS) is the maximum storage of precipitation and runoff in the soil surface at a given slope. The DS is determined by soil roughness that in agricultural soils is largely affected by tillage. The direct ... -
Evaluation of surface roughness parameters in agricultural soils with different tillage conditions using a laser profile meter
Surface roughness crucially affects the hydrological and erosive behaviours of soils. In agricultural areas surface roughness is directly related to tillage, whose action strongly affects the key physical properties of ... -
Evaluation of the improvement of streamflow prediction through the assimilation of remotely sensed soil moisture observations
El objetivo principal de esta tesis es evaluar si la asimilacion de datos de humedad superficial del suelo obtenidos mediante tecnicas de teledeteccion, en modelos hidrologicos es capaz de mejorar la prediccion de caudales ... -
Evaluation of TOPLATS on three Mediterranean catchments
Physically based hydrological models are complex tools that provide a complete description of the different processes occurring on a catchment. The TOPMODEL-based Land-Atmosphere Transfer Scheme (TOPLATS) simulates water ...