A5005037627- Remote Sensing and LiDAR Applications
- Computational Fluid Dynamics and Aerodynamics
- Remote Sensing in Agriculture
- Fluid Dynamics and Turbulent Flows
- Coastal and Marine Dynamics
- Groundwater flow and contamination studies
- Fire effects on ecosystems
- 3D Surveying and Cultural Heritage
- Forest ecology and management
- Advanced Numerical Methods in Computational Mathematics
- Differential Equations and Numerical Methods
- Nuclear and radioactivity studies
- Soil Geostatistics and Mapping
- Navier-Stokes equation solutions
- Remote-Sensing Image Classification
- Developmental and Educational Neuropsychology
- Flood Risk Assessment and Management
- Land Use and Ecosystem Services
- Advanced Optical Sensing Technologies
- Tropical and Extratropical Cyclones Research
- Gas Dynamics and Kinetic Theory
- Remote Sensing and Land Use
- Lattice Boltzmann Simulation Studies
- Forest Ecology and Biodiversity Studies
- Coastal wetland ecosystem dynamics
Universitat Politècnica de València
2014-2023
This paper evaluates the accuracy of shoreline positions obtained from infrared (IR) bands Landsat 7, 8, and Sentinel-2 imagery on natural beaches. A workflow for sub-pixel extraction, already tested seawalls, is used. The present work analyzes behavior that resultant shorelines a micro-tidal (<20 cm) sandy beach makes comparison with other more accurate sets shorelines. These were using differential GNSS surveys terrestrial photogrammetry techniques through C-Pro monitoring system. 21...
Live fuel moisture content (LFMC) is an input factor in fire behavior simulation models highly contributing to ignition and propagation. Developing capable of accurately estimating spatio-temporal changes LFMC different forest species needed for wildfire risk assessment. In this paper, empirical model based on multivariate linear regression was constructed the cover classified as shrublands central part Valencian region Eastern Mediterranean Spain season. A sample 15 non-monospecific...
This paper presents a new methodological process for detecting the instantaneous land-water border at sub-pixel level from mid-resolution satellite images (30 m/pixel) that are freely available worldwide. The method is based on using an iterative procedure to compute Laplacian roots of polynomial surface represents radiometric response set pixels. uses first approximation shoreline pixel (initial pixels) and selects neighbouring pixels be part analysis window. adaptive window collects those...
Abstract The spatial pattern of precipitation is a complex variable that strongly depends on other geographic and topographic factors. As usually known only at certain locations, interpolation procedures are needed in order to predict this regions. use multivariate methods preferred, as secondary variables—generally derived using GIS tools—correlated with can be included. In paper, comparative study different univariate methodologies presented. Our area centred the region Valencia, located...
Abstract. A statistical analysis of the results obtained by tool SELI (Shoreline Extraction from Landsat Imagery) is made in order to characterise medium and long term period changes occurring on beaches. The based hypothesis that intraannual shifts coastline positions hover around an average position, which would be significant when trying set these trends. Fluctuations this are understood as effect short-term -variations related sea level, wave run-up, immediate morphological beach profile...
<p>Los métodos de regresión se utilizan ampliamente en el ámbito forestal para la predicción y cartografiado las variables estructura combustibilidad. En este artículo evalúan diferentes modelos (lineal, no lineal, árboles ensemble). Como independientes utilizaron métricas extraídas datos LiDAR full-waveform, mientras que los valores dependientes generaron a partir basados campo obtenidos 78 parcelas 16 m radio. Se llevaron cabo transformaciones e con selección atributos evaluar su...
This paper presents empirical models developed through stepwise multiple linear regression to estimate the live fuel moisture content (LFMC) in a Mediterranean area. The are based on LFMC data measured 50 field plots, considering four groups with similar bioclimatic characteristics and vegetation types (trees shrubs). We also applied species-specific model for Rosmarinus officinalis plots this dominant species. Spectral indices extracted from Sentinel-2 images their averages over study time...
The aim of this work is to solve hyperbolic conservation laws by means a finite volume method for both spatial and time discretization. We extend the ideas developed in [X.-D. Liu S. Osher, SIAM J. Numer. Anal., 33 (1996), pp. 760--779; X.-D. E. Tadmor, Math., 79 (1998), 397--425] fourth-order upwind central schemes. In order do this, once we know cell-averages solution, $\overline {u}_j ^n$, cells $I_{j}$ at $T=t^n$, define new three-degree reconstruction polynomial that each cell, $I_{j}$,...
<p>En este trabajo se proponen y evalúan diferentes parámetros matemáticos extraídos del semivariograma experimental para la clasificación de los usos suelo mediante imágenes alta resolución, usando límites catastrales definición objetos análisis. En primer lugar, describe el proceso cálculo a partir valores niveles gris objeto imagen. Con fin optimizar tiempo presentan dos técnicas selección píxeles que conservan forma original semivariograma. A continuación definen varios Final-...
Abstract. Beach and fluvial systems are highly dynamic environments, being constantly modified by the action of different natural anthropic phenomena. To understand their behaviour to support a sustainable management these fragile it is very important have access cost-effective tools. These methods should be supported on cutting-edge technologies that allow monitoring dynamics with high periodicity repeatability at temporal spatial scales instead tedious expensive field-work has been carried...
Abstract In this paper we have developed a finite volume ENO scheme, third‐order accurate, based on cell averages and TVD Runge–Kutta time discretization to solve advection–diffusion equations in two‐dimensional spatial domain. We designed special interpolating polynomial modified scheme Hermite procedure which avoids the excessive smearing regions with sharpconcentration fronts overcompression effects produced by technique. Thesemodifications do not affect non‐oscillatory philosophy since...
Abstract This paper presents a new point value reconstruction algorithm based on average values or flux for central Runge–Kutta schemes in the resolution of hyperbolic conservation laws. employs fourth‐order accurate approximation solution at two extrema and mid‐point each cell. These are modified order to enforce monotonicity shape preserving properties. correction has been applied essentially cells close maxima minima these cases, it proven that is accurate. In with maximum minimum...
Abstract. LiDAR full-waveform provides a better description of the physical and forest vertical structure properties than discrete since it registers full wave that interacts with canopy. In this paper, effect flight line side-lap is analysed on canopy fuel variables estimations. Differences are related to pulse density changes between stripe areas, varying point 2.65 m−2 33.77 in our study area. These differences modify metrics extracted from data therefore variable values estimated these...
Beach and fluvial systems are highly dynamic environments, being constantly modified by the action of different natural anthropic phenomena. To understand their behaviour to support a sustainable management these fragile it is very important have access cost-effective tools. These methods should be supported on cutting-edge technologies that allow monitoring dynamics with high periodicity repeatability at temporal spatial scales instead tedious expensive field-work has been carried out up...