Title:	Estimation of aboveground biomass stock in tropical savannas using photogrammetric imaging.
Authors:	QUEIROZ, R. F. P. OLIVEIRA, M. V. N. d' REZENDE, A. V. ALENCAR, P. A. L. de
Affiliation:	ROBERTA FRANCO PEREIRA DE QUEIROZ, UNIVERSIDADE DE BRASILIA; MARCUS VINICIO NEVES D OLIVEIRA, CPAF-AC; ALBA VALÉRIA REZENDE, UNIVERSIDADE DE BRASILIA; PAOLA AIRES LÓCIO DE ALENCAR, UNIVERSIDADE DE BRASILIA.
Date Issued:	2023
Citation:	Drones, v. 7, n. 8, 493, July 2023.
Description:	The use of photogrammetry technology for aboveground biomass (AGB) stock estimation in tropical savannas is a challenging task and is still at a preliminary stage. This work aimed to use metrics derived from point clouds, constructed using photogrammetric imaging obtained by an RGB camera on board a remotely piloted aircraft (RPA), to generate a model for estimating AGB stock for the shrubby-woody stratum in savanna areas of Central Brazil (Cerrado). AGB stock was estimated using forest inventory data and an allometric equation. The photogrammetric digital terrain model (DTM) was validated with altimetric field data, demonstrating that the passive sensor can identify topographic variations in sites with discontinuous canopies. The inventory estimated an average AGB of 18.3 (±13.3) Mg ha-1 at the three sampled sites. The AGB model selected was composed of metrics used for height at the 10th and 95th percentile, with an adjusted R2 of 93% and a relative root mean squared error (RMSE) of 16%. AGB distribution maps were generated from the spatialization of the metrics selected for the model, optimizing the visualization and our understanding of the spatial distribution of forest AGB. The study represents a step forward in mapping biomass and carbon stocks in tropical savannas using low-cost remote sensing platforms.
Thesagro:	Árvore Florestal Cerrado Biomassa Parte Aérea Estimativa Sensoriamento Remoto Aerofotogrametria
NAL Thesaurus:	Forest trees Savannas Aboveground biomass Estimation Remote sensing Unmanned aerial vehicles
Keywords:	Drone Sabanas Árboles forestales Biomasa aérea Estimación Teledetección Aerial photogrammetry Vehículos aéreos no tripulados Distrito Federal (DF)
ISSN:	2504-446X
DOI:	https://doi.org/10.3390/drones7080493
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CPAF-AC)