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Forest height growth modelling
Forest Ecology and Management, 1995Abstract There are many functional forms which may be used to model height against age, and a variety of methods by which the model parameters may be estimated. There are four main questions that the forest height modeller needs to decide upon. 1. (1) Should each height-age trajectory be modelled separately? 2.
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Impacts of topography for forest height estimation
2012 First International Conference on Agro- Geoinformatics (Agro-Geoinformatics), 2012Forest height is one of the important ecological elements and its estimation has been developed recent years. Forest height estimation is usually obtained through the scattering centers between canopy and ground using Pol-InSAR data. There are three classes of method for forest height estimation, phase-difference between interferograms, coherence ...
Wenmei Li +5 more
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The Height of Factorization Forests
2008We show that for every homomorphism from A+to a finite semigroup Sthere exists a factorization forest of height at most 3 i¾? Si¾? i¾? 1. Furthermore, we show that for every non-trivial group, this bound is tight. For aperiodic semigroups, we give an improved upper bound of 2 i¾? Si¾? and we show that for every ni¾?
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Averaged electrical parameters of forest vegetation and the height of forest cover
Technical Physics, 2014A device and a method for measuring the electrical parameters (resistivity ρ and permittivity ɛ) of forest vegetation are described. The measuring method and the data processing technique are detailed for a forest area the resistivity and permittivity of which measured in the ranges of long and very long waves are ρ = 37 ± 12 kΩ m and ɛ = 1.6 · 0.3 ...
V. K. Balkhanov +2 more
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Height–diameter allometry in African monodominant forest close to mixed forest
Journal of Tropical Ecology, 2021AbstractAfrican monodominant forests are frequently formed byGilbertiodendron dewevrei(De Wild.) J. Leonard and commonly found close to mixed forests. However, previous studies have ignored differences between these two forest types in height–diameter allometry, which is extremely important for aboveground biomass (AGB) estimates.
Grace Jopaul Loubota Panzou +3 more
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Combination of PolInSAR and LiDAR Techniques for Forest Height Estimation
IEEE Geoscience and Remote Sensing Letters, 2017Forests are simplified as homogeneous volumes constituted of randomly uniform particles, characterized by a constant extinction coefficient in the random volume over ground (RVoG) model, which has been extensively applied to polarimetric synthetic aperture radar (SAR) interferometry for forest height estimation.
Wenxue Fu +5 more
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Height growth–rate at a given height: A mathematical perspective for forest productivity
Ecological Modelling, 2020Abstract Understanding the height growth of trees is a fundamental component for scientific knowledge and management of forest ecosystems. The height of dominant trees at a reference-age, commonly known as the site-index, is the most widely used forest productivity indicator globally.
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Forest Stand Height Estimation
2019The measurement of forest structural characteristics is important for a variety of Monitoring, Reporting, and Verification (MRV) protocols in resource management.\r\nOne characteristic of particular importance is Forest Stand Height (FSH), or the average height of trees in a forest stand. In this context, FSH can be used an indicator\r\nof the age of a
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Extinction threshold for spatial forest dynamics with height structure
Journal of Theoretical Biology, 2011We present a pair-approximation model for spatial forest dynamics defined on a regular lattice. The model assumes three possible states for a lattice site: empty (gap site), occupied by an immature tree, and occupied by a mature tree, and considers three nonlinearities in the dynamics associated to the processes of light interference, gap expansion ...
Garcia Domingo, Josep Lluís +1 more
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Height of Crown Scorch in Forest Fires
Canadian Journal of Forest Research, 1973A relation between fire behavior and crown scorch height is derived from measurements on 13 experimental outdoor fires. The range of data includes fire intensities from 16 to 300 kcal/s-m, and scorch heights from 2 to 17 m. The results agree with established theory that scorch height varies with the 2/3 power of line-fire intensity. The effects of air
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