Uso do laser scanner terrestre na estimativa de parâmetros biométricos em povoamentos florestais

Almeida, Gustavo José Ferreira de

doi:10.11606/d.11.2018.tde-02032018-094924

Cited by 1 publication

(2 citation statements)

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“…Other important factors that contributed to the accurate measurement of DBH by TLS were the small wind interference and the laser scanner operating range (on average 1.50 m) close to the DBH height (Almeida, 2017). This was confi rmed by the L&O test result, which indicated identity among the DBH values collected using the conventional method and those using the TLS.…”

Section: Discussionmentioning

confidence: 85%

“…TH is one of the tree components that most signifi cantly contribute to the stem volume, and it was therefore expected that stem volume would show a trend similar to that of TH (Torresan et al, 2018). In addition, considering the stem tapering pattern, larger diameters are closer to the target height, which culminates in smaller incidence angles (Buck, 2017;Almeida, 2017). With this variation in the accuracy of the data along the stem, the result of the L&O test confi rmed the statistical diff erence among the volumes acquired using the two diff erent methods.…”

Section: Discussionmentioning

confidence: 99%

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Timber Volume Estimation by Using Terrestrial Laser Scanning: Method in Hyperdiverse Secondary Forests

et al. 2022

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High accuracy in timber volume estimation in tropical forests is required to support sustainable management. Terrestrial laser scanners (TLS) can provide high-quality estimates from tree structural variables. We compared stem variable estimations obtained by TLS and traditional methods at tree level and adjusted volume equations using data of a secondary seasonal semideciduous forest (Atlantic Forest). We also discuss the feasibility of TLS in hyperdiverse and secondary forest fragments. Traditional measurements (Method I) and TLS-based measurements (Method II) were performed on 29 trees belonging to 10 species. Volume equations based on the Schumacher and Hall (SH) and Spurr models were generated. DBH (diameter at breast height) was equal for both methods. Total height (TH) was overestimated by Method II, and commercial height (CH) showed a low correlation between the two methods. The adjusted volumetric equations were different for both methods, and those based on the SH volume model showed the best fit. Our results lead us to infer that in hyperdiverse secondary forests, tree structural variables should be obtained via TLS. However, attention should be given to the occlusion of target trees by the regenerating understory and to height estimates, which can be biased by the crown characteristics of the dominant species.

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Section: Discussionmentioning

confidence: 85%