Analyze the Relationship Between Aboveground Biomass and NDVI Values Derived from UAV Multispectral Imagery

Abstract

Aboveground biomass is usually estimated using an allometric method. Diameter at breast height (DBH) is one of the important variables that is used in estimating aboveground biomass. There is a relationship between aboveground biomass values with size of trees, DBH, tree height, crown diameter and greenness of trees. In remote sensing, the tree biophysical parameters can be derived from digital image processing and greenness of the trees can be assessed using normalized difference vegetation index (NDVI). Thus, the aim of this study is to analyze the relationship between aboveground biomass and NDVI values using UAV-based multispectral imagery. Three developed allometric equations were used to analyse the relationship between aboveground biomass and NDVI values. The results show that there is a moderate relationship between the NDVI values derived from multispectral imagery and estimated aboveground biomass with average R2 is 0.55. Altogether, 347 samples of data have been successfully collected at the study in Seksyen U11, Bukit Bandaraya, Shah Alam with the average diameter at breast height (DBH) is 29.457cm.