A Comparative Analysis of Estimating Tree Carbon Stock using Rangefinder Camera and Measuring Pole for Tree Height Measurements

การเปรียบเทียบวิธีการประเมินการกักเก็บคาร์บอนของต้นไม้ โดยใช้กล้องวัดระยะความสูงชนิดเลเซอร์และไม้วัดความสูง

Abstract

          Trees play a crucial role in capturing carbon dioxide and storing it as biomass. One method to estimate carbon dioxide equivalent absorption and storage in trees is through measuring biomass using the Allometric equation, which utilizes height and circumference information. This research aims to compare tree height measurement tools using a traditional height measuring pole and laser rangefinder camera. A sample group of 97 trees of general deciduous types within a 15,605.10 square meter area of Rajabhat Lampang University was studied. The heights measured by both methods were averaged and categorized into five height classes (H-Class): 2-4, 4-6, 6-8, 8-10, and higher than 10 meters. The average heights measured using the traditional measuring pole were 3.467, 5.033, 6.980, 9.180, and 11.117 meters, respectively. The heights measured with the laser rangefinder yielded averages of 3.290, 4.909, 6.876, 9.062, and 10.940 meters, respectively. Statistical analysis revealed no significant difference between the two measurement tools at a 95% confidence level and the correlation coefficient (R²) value of 0.996. Furthermore, considering measurement errors from three different observers using the laser rangefinder and repeating measurements, no significant differences were found at a 95% confidence level. Calculations for carbon storage in trees using both methods resulted in 19,329 and 19,126 kilograms of carbon dioxide equivalent (kgCO2eq), respectively, with a difference of 1.3%.