Application of Digital Color Aerial Photography for Biomass Evaluation at the Ban Pred Nai Mangrove Forest, Trat Province

Main Article Content

Pattanapun Juajun
Ladawan Puangchit
Wanchai Arunpraparut

Abstract

                The amount of biomass is an indicator of the fertility of a mangrove forest. Most biomass assessments are carried out using random field plots, which is time-consuming, laborious, and expensive. This study aimed to investigate the relationships between normalized difference vegetation index (NDVI) and biomass of a mangrove forest using digital color aerial photographs (DMC) and geographic information system (GIS). The studied mangrove forest is located at the Ban Pred Nai, Trat province. Field data were collected from 24 sample plots. The diameter and height of all trees with DBH > 4.5 cm was measured. The aboveground biomass of the trees in each sample plot was calculated by using allometric equations developed earlier for mangrove forests located along the Gulf of Thailand. Relationships between NDVI and the aboveground biomass were constructed and the relationship was expressed through the best fit equation.


              The results showed that there were 9 species in the forest with a density of 3,838 trees per hectare. Ceriops tagal was the most common plant species with a density of 1,450 trees ha-1. The results also indicated that the mean diameter in the mangrove forest was 8.95±3.91 cm and the height was 12.10±2.85 m. The average aboveground biomass estimated from the field survey was 212.52±5.19 t ha-1. The equation best describing the relationship between NDVI and aboveground biomass was in the form of an exponential equation = 26.784e5.2437(NDVI), with the coefficient of determination (R2) of 0.8969. The aboveground biomass estimated from the NDVI was 199.04 t ha-1. The aboveground biomass estimated from NDVI and field survey was not statistically different (p>0.05).

Article Details

How to Cite
Juajun, P. ., Puangchit, L. ., & Arunpraparut, W. . (2020). Application of Digital Color Aerial Photography for Biomass Evaluation at the Ban Pred Nai Mangrove Forest, Trat Province. Thai Journal of Forestry, 39(2), 52–65. Retrieved from https://li01.tci-thaijo.org/index.php/tjf/article/view/249029
Section
Original Articles

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