首页> 美国卫生研究院文献>other >Development of Standard Fuel Models in Boreal Forests of Northeast China through Calibration and Validation
【2h】

Development of Standard Fuel Models in Boreal Forests of Northeast China through Calibration and Validation

机译:通过标定和验证开发东北北方森林标准燃料模型

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

Understanding the fire prediction capabilities of fuel models is vital to forest fire management. Various fuel models have been developed in the Great Xing'an Mountains in Northeast China. However, the performances of these fuel models have not been tested for historical occurrences of wildfires. Consequently, the applicability of these models requires further investigation. Thus, this paper aims to develop standard fuel models. Seven vegetation types were combined into three fuel models according to potential fire behaviors which were clustered using Euclidean distance algorithms. Fuel model parameter sensitivity was analyzed by the Morris screening method. Results showed that the fuel model parameters 1-hour time-lag loading, dead heat content, live heat content, 1-hour time-lag SAV(Surface Area-to-Volume), live shrub SAV, and fuel bed depth have high sensitivity. Two main sensitive fuel parameters: 1-hour time-lag loading and fuel bed depth, were determined as adjustment parameters because of their high spatio-temporal variability. The FARSITE model was then used to test the fire prediction capabilities of the combined fuel models (uncalibrated fuel models). FARSITE was shown to yield an unrealistic prediction of the historical fire. However, the calibrated fuel models significantly improved the capabilities of the fuel models to predict the actual fire with an accuracy of 89%. Validation results also showed that the model can estimate the actual fires with an accuracy exceeding 56% by using the calibrated fuel models. Therefore, these fuel models can be efficiently used to calculate fire behaviors, which can be helpful in forest fire management.
机译:了解燃料模型的火灾预测能力对于森林火灾管理至关重要。在中国东北的大兴安岭开发了各种燃料模型。但是,这些燃料模型的性能尚未针对野火的历史发生进行过测试。因此,这些模型的适用性需要进一步研究。因此,本文旨在开发标准燃料模型。根据潜在的火灾行为,将七个植被类型组合为三个燃料模型,并使用欧几里德距离算法进行聚类。通过莫里斯筛选方法分析了燃料模型参数的敏感性。结果表明,燃料模型参数1小时时滞负荷,死热量,活热量,1小时时滞SAV(表面积-体积),实时灌木SAV和燃料床深度具有较高的灵敏度。 。由于两个主要的敏感燃料参数:1小时时滞负荷和燃料床深度,被确定为调整参数,因为它们具有很高的时空可变性。然后,使用FARSITE模型测试组合燃料模型(未校准的燃料模型)的火灾预测能力。事实证明,FARSITE可以对历史大火产生不切实际的预测。但是,经过校准的燃料模型大大提高了燃料模型预测实际火灾的能力,准确度为89%。验证结果还表明,该模型可以通过使用校准的燃料模型来估计实际火灾,其准确性超过56%。因此,这些燃料模型可以有效地用于计算火灾行为,这对森林火灾的管理很有帮助。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号