NPWS Overall Fuel Hazard Assessment (OFH)

This dataset contains a standardised assessment of the Overall Fuel Hazard at a location and point in time.\r\n\r\nNPWS requires a consistent and defendable fuel assessment process to support fire management. Several fuel assessment methods are currently available for use in south-east Australia, two of these are: \r\n\r\n - The Overall Fuel Hazard (OFH) Guide (McCarthy et al. 1999), and \r\n - Project Vesta (Gould et al. 2007). \r\n\r\nNPWS Fire Management Manual Policy specifies the use of the Overall Fuel Hazard Guide 3rd Edition (McCarthy et al. 1999). This is the specified fuel assessment tool in Bushfire Management Coordinating Committee policy and must be used, as a minimum, by NPWS when measuring pre- and post-fuel hazard for prescribed burning operations. \r\n\r\nThe University of Wollongong has identified that the 3rd and 4th editions of the OFH Guides can generate very different results from the same sample point, with the 4th edition commonly providing higher fuel hazard ratings, which has implications for risk management planning, burn intervals and burn prescriptions.\r\n\r\nFrom 27th June 2019 the collection process was streamlined to only capture the data required for the operational OFH calculation. Prior to this extra fields were being collected to form a dataset that could be utilised for research purposes. Fire Management Circular 2019/06 has more details but the changes are summarised below.\r\n\r\n1. Nine fields have been removed from the form and are no longer required to be captured.\r\n2. Vegetation type is now mandatory.\r\n3. If Heathland/Shrubland vegetation type is selected, only two OFH fields are required.\r\n4. Equivalent fuel load (t/ha) is now calculated automatically by Elements.本数据集包含某一地点及特定时间点下的标准化总体燃料风险（Overall Fuel Hazard, OFH）评估结果。 国家公园与野生动物服务局（NPWS）需构建一套统一且可论证的燃料评估流程，以支撑火灾管理工作。当前澳大利亚东南部可采用多种燃料评估方法，其中两类为： - 《总体燃料风险（OFH）指南》（McCarthy等，1999） - 维斯塔项目（Project Vesta）（Gould等，2007） NPWS《火灾管理手册政策》明确规定需使用《总体燃料风险指南（第3版）》（McCarthy等，1999）。该指南为澳大利亚丛林火灾管理协调委员会政策指定的燃料评估工具，NPWS在开展计划火烧作业的燃料风险事前、事后评估时，至少应采用该工具。 伍伦贡大学（University of Wollongong）研究表明，OFH指南第3版与第4版对同一采样点的评估结果差异显著，其中第4版给出的燃料风险评级普遍更高，这将对风险管理规划、火烧间隔期及火烧作业方案的制定产生影响。 自2019年6月27日起，数据采集流程已精简优化，仅保留业务化OFH计算所需的数据字段。此前采集了额外字段以构建可用于科研用途的数据集。《2019/06号火灾管理通告》包含更多细节，本次调整的核心内容概要如下： 1. 已从表单中移除9个字段，无需再采集相关数据。 2. 植被类型现已设为必填项。 3. 若选择石楠荒地/灌丛（Heathland/Shrubland）植被类型，则仅需填写2个OFH相关字段。 4. 等效燃料载荷（单位：吨/公顷，t/ha）现已由Elements系统自动计算生成。