Utilizing Unmanned Aerial Vehicles to Assess Carbon Sequestration in Trees Conducted in Response to Plant Genetic Conservation Project Under the Royal Initiative of Her Royal Highness Princess Maha Chakri Sirindhorn at Chiang Rai Rajabhat University

This study aimed to assess the carbon sequestration derived from field surveys and unmanned aerial vehicles (UAV) in the plant genetic protection area established under the Royal Initiative of Her Royal Highness Princess Maha Chakri Sirindhorn at Chiang Rai Rajabhat University (RSPG-CRRU), encompassing 4.66 hectares. Four sample plots of 50 by 20 meters were randomly created. We assessed the diameter and height of trees within the sample plots. The above-ground biomass of trees was 95.78 metric tons per hectare. Carbon sequestration amounted to 45.01 tons of carbon per hectare, whereas total carbon dioxide absorption reached 165.22 tons of CO<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> equivalent per hectare. The utilization of UAVs to evaluate above-ground carbon sequestration shown a strong correlation (r = 0.97) with field data, and the root mean square error was ±0.38 meters. UAV data indicates that the above-ground biomass was 29.02 tons per hectare. The carbon sequestration of trees was 13.65 tons of carbon per hectare, while the carbon dioxide absorption was 106.55 tons of CO<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> equivalent per hectare.