Estimating above Ground Biomass of Fraxinus griffithii C. B. Clarke using Remotely Sensed Data in Royal Project Area, Chiang Mai, Thailand

Abstract

This research aims to estimate above ground biomass or AGB of Fraxinus griffithii C. B. Clarke from remotely sensed data. The methodology includes analyzing 13 vegetation indices from LANDSAT 8 OLI satellite image which was captured on 7 March 2015. The AGB from previous researchers were calculated using by allometric equation. The allometric equation could be done by collecting diameter at breast height and height of F. griffithii in 26 sample plots of 7 royal project stations in Chiang Mai province including Mok Jam station, Kae Noi station, Nong Kiew station, Huy Luk station, Nong Hoy station, AngKhang station and Pang Da station. There was also an analysis of vegetation indices which influences to AGB. This analysis was carried out by correlation and stepwise regression. The study found that Brightness, Greenness and Wetness related with AGB. Moreover, Brightness, Ratio and Greenness influences the calculation of AGB. Model validation could predict estimation of AGB with 63.19 percent Accuracy.