In Sokra
Faculty of Food Engineering, University of Kratie, Cambodia

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Allometric Models to Predict Total Height and Diameter at Breast Height (DBH) for the Flooded Forest Ecosystems in Cambodia Horn Sarun; Sok Pheak; Horn Meta; Chhaun Molikoy; In Sokra; Rima Darmawanti
Jurnal Ilmu Kehutanan Vol 20 No 1 (2026): March
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jik.v20i1.25617

Abstract

Reliable allometric equations are essential for estimating forest structure, biomass, and carbon stocks, which are still scarce in Cambodia's flooded forests. Therefore, this study aimed to develop predictive models fortwo key allometric relationships: (1) total tree height as a function of diameter at breast height (DBH) and (2) estimation of DBH from stump diameter when DBH measurements were unavailable. The analysis compared their performance using the coefficient of determination (R2), Root Mean Square Error (RMSE), and Akaike Information Criterion (AIC). The results showed that the logarithmic model performed optimally for Height–DBH relationship (R2 = 0.494; RMSE = 2.59 m; AIC = 1738.9). The selected equation, H = −1.7261 + 4.1124 × ln (DBH). DBH correlated strongly with stump diameter (r = 0.98, p < 0.001), with the power equationDBH = 0.969 × Stump Diameter0.983 as the best predictor. These stumpbased relationships served as important tools in estimating biomass and carbon stocks in disturbed or logged forests where DBH could not be measured directly. Furthermore, the results showed the structural variability of Cambodia's flooded forests and provided practical allometric tools for forest inventory, biomass estimation, and carbon accounting underREDD+ initiatives.