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Estimation of Forest Variable and Aboveground Biomass using Terrestrial Laser Scanning in the Tropical Rainforest

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Abstract

Estimation of accurate forest variable is crucial for forest monitoring and quantifying forest aboveground biomass (AGB). The objective of this study was to estimate forest variables and AGB using the TLS data acquired over the tropical rainforest of Malaysia. Individual trees were detected using the manual detection method in the RiSCAN PRO software. An average tree detection rate of 99.55% was achieved from the 10 sample plots. Forest variables, including DBH and height, were measured from 10 circular sample plots in the field. The accuracy of diameter at breast height (DBH) of trees measured from TLS was validated using field DBH as reference. A root means square error (RMSE) of 1.37 cm (6.60%) was obtained for manually measured TLS DBH. Similarly, TLS-based tree height was validated using airborne laser scanner height as a reference and resulted in RMSE of 1.74 m (9.30%). Finally, AGB was calculated using the variables derived from the TLS data. The result has shown an R2 value of 0.98 and RMSE of 0.077 Mg for AGB calculated from TLS data. The result of this study confirmed that TLS can provide a very good estimation of forest variables and AGB in the tropical dense rainforest.

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Acknowledgements

The research was conducted in Ayer Hitam tropical rainforest, Malaysia, in collaboration with the University of Putra Malaysia. This research was funded by NUFFIC, the Netherlands Fellowship Programmes (NFP). We are grateful for those who were actively involved and helped us in the field data collection. We are also thankful for the anonymous reviewers who gave us constructive comments and suggestions that helped us to improve the manuscript.

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Correspondence to Solomon Mulat Beyene.

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Beyene, S.M. Estimation of Forest Variable and Aboveground Biomass using Terrestrial Laser Scanning in the Tropical Rainforest. J Indian Soc Remote Sens 48, 853–863 (2020). https://doi.org/10.1007/s12524-020-01119-2

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  • DOI: https://doi.org/10.1007/s12524-020-01119-2

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