澳洲论文代写：火灾预测系统
澳洲论文代写：火灾预测系统
火灾预测系统FWI主要用于加拿大和英国，它的基础是两个中间火行为指数值:累积指数(BUI)和初始传播指数(ISI)。ISI指数提供了风速和FFMC对森林火灾预期蔓延的综合影响的估计值。所开发的方程是一个简单的指数函数，可以使FWI的风速增加一倍，风速约为每小时20公里。第二个指标是DMC和干旱代码(DC)的组合形式，它指的是对森林火灾有更深或更大的燃料的可用性。FWI值是由ISI和BUI值的组合来计算的，它代表火可以传播的最高日强度，即每单位长度的火焰的能量输出速率。
FFDI和FWI之间的关系
在这里，FFDI系统和FWI系统相互比较。本文分析了这两种系统的不同之处，并分析了这两种系统之间的差异。因此，两种类型的森林火灾指数系统之间的关系将被确定。FWI和FFDI系统之间的关系是为了在澳大利亚森林中实现FWI系统的火灾危险阈值(根据表1所示的FFDI阈值的实现)(Berry,1974)而开发的。一旦建立了关系，就使用散点图进一步研究两个指标之间的关系的准确性，通过分析两个指标之间的价值之间的巨大差异。
澳洲论文代写：火灾预测系统
The fire forecast system FWI, which is used primarily in Canada and UK has its base on two intermediate Fire Behavior Indices values: The buildup index (BUI) and the Initial Spread Index (ISI). The ISI indices provide estimated value of the combined impact of wind speed and the FFMC on the projected spread of forest fire. The developed equation is a simple exponential function which provides double the value of FWI for the wind speed increment of about 20 Km per hour. The second indices, the buildup index are a combined form of DMC and the Drought Code (DC), and it refers to the availability of deeper or large amounts of fuel for the forest fire. The FWI value is calculated by the combination of the ISI and BUI values, and it represents the highest daily intensity by which the fire can spread, in terms of the energy output rate for the per unit length of the fire.
THE RELATIONSHIP BETWEEN THE FFDI AND FWI
Here, the FFDI system and the FWI systems are compared with each other. Various similarities between the two systems and the differences between these two systems are analyzed in this part of the paper. As a result of the comparison, a relationship would be identified between these two types of forest fire indices systems. The relationship amongst the FWI and FFDI systems is developed in order to generate an indication of the fire danger threshold value of the FWI system for its implementation in the Australian forests (basing the implementation of the FFDI thresholds which were shown in the table 1)(Berry, 1974). Once the relationship has been established, scatter plots are used to further investigate the accuracy of the relationship identified between the two indices, by an analysis of the days when the two indices provide large difference between their values.
