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通过测定防火林带枯落物水喷淋前后含水率的变化,建立枯落物含水率与时间变化曲线模型,得出枯枝和枯叶的含水率与时间变化函数。结果表明,喷淋1 h后林内枯枝、枯叶含水率分别从喷淋前的17.6%、13.1%升至45.9%、59.2%,之后含水率随时间延长逐渐下降;喷淋后,林带内枯枝、枯叶由易燃和可燃状态转变为不燃和难燃状态,并分别维持26.4、23.9 h。1次有效的水喷淋能显著提高林带防火能力。
By measuring the change of water content before and after water spray of forest fire litter, the model of moisture content and time of litter was established, and the moisture content and time change function of litter and dead leaf were obtained. The results showed that the moisture content of dead branches and dead leaves increased from 17.6% and 13.1% before spraying to 45.9% and 59.2% after spraying for 1 h, respectively. Afterwards, the water content decreased gradually with time increasing. After spraying, Litter, dead leaves from flammable and flammable to non-flammable and non-flammable state, and were maintained for 26.4,23.9 h. 1 effective water spray can significantly improve the forest fire resistance.