红松针叶床层风影响因子的模拟

doi:10.11707/j.1001-7488.20140118

Abstract

Abstract:

According to an experimental design in our previous study, fuelbeds were constructed with varied fuel moisture, loading and depth of Korean pine (Pinus koraiensis) needles collected from Korean pine plantations. Totally 87 experimental fires with these fuelbeds were burned in laboratory under different wind conditions. The results showed that wind factor was in 1.24-14.51 when wind speed was in 0.9-4.6 m ·s^-1. The existing models of wind factor are not applicable for Korean pine needles. The model parameter rationalization displayed that the power function model was better than the exponential function model and the multi-sector model was better than the single factor model. Packing ratio and fuel moisture significantly influenced wind factor and their relative error reduction ratio was from 3.7% to 8.2% and 2.9% to 5.4%, Respectively. The effect of fuel loading and fuelbed depth on wind factor was not significant. The wind factor model established with wind speed and packing ratio as predictive variables can account for 45.3% variance of wind factor with mean absolute error of 1.727 and mean relative error less than 28%. Model accuracies were significantly improved when established by packing ratio and fuel moisture with MAE of 1.03 and 75.6% of variance of wind factor explained.

Key words: wind factor, packing ratio, moisture, Korean pine

CLC Number:

S762

Li Cunyu, Jin Sen, Zhou Yong, Zhang Jili. A Simulation on Wind Factors of Fuelbed of Korean Pine Needles[J]. Scientia Silvae Sinicae, 2014, 50(1): 116-124.

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A Simulation on Wind Factors of Fuelbed of Korean Pine Needles

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