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首页> 外文期刊>Open Journal of Ecology >Retrospective analysis of two northern California wild-land fires via Landsat five satellite imagery and Normalized Difference Vegetation Index (NDVI)
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Retrospective analysis of two northern California wild-land fires via Landsat five satellite imagery and Normalized Difference Vegetation Index (NDVI)

机译：通过Landsat的五颗卫星图像和归一化植被指数（NDVI）对北加州的两次野火进行回顾性分析

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摘要

Wild-land fires are a dynamic and destructive force in natural ecosystems. In recent decades, fire disturbances have increased concerns and awareness over significant economic loss and landscape change. The focus of this research was to study two northern California wild-land fires: Butte Humboldt Complex and Butte Lightning Complex of 2008 and assessment of vegetation recovery after the fires via ground based measurements and utilization of Landsat 5 imagery and analysis software to assess landscape change. Multi-temporal and burn severity dynamics and assessment through satellite imagery were used to visually ascertain levels of landscape change, under two temporal scales. Visual interpretation indicated noticeable levels of landscape change and relevant insight into the magnitude and impact of both wild-land fires. Normalized Burn Ratio (NBR) and delta NBR (DNBR) data allowed for quantitative analysis of burn severity levels. DNBR results indicate low severity and low re-growth for Butte Humboldt Complex “burned center” subplots. In contrast, DNBR values for Butte Lightning Complex “burned center” subplots indicated low-moderate burn severity levels.
机译：野火是自然生态系统中的一种动态和破坏性力量。在最近的几十年中，火灾扰动引起了人们对重大经济损失和景观变化的担忧和认识。这项研究的重点是研究北加州的两次野火：2008年的洪堡山丘复合体和闪电山丘复合体，并通过地面测量和利用Landsat 5影像及分析软件评估景观变化来评估火灾后的植被恢复。多时相和烧伤严重程度的动态变化以及通过卫星图像进行的评估被用于在视觉上确定两个时间尺度下的景观变化水平。视觉解释表明，景观变化显着，并且对野火的程度和影响都有相关见解。归一化燃烧率（NBR）和增量NBR（DNBR）数据可用于燃烧严重性水平的定量分析。 DNBR结果表明，Butt Humboldt复合材料“烧制中心”子图的严重性较低且重新生长较低。相比之下，Butte Lightning Complex“已烧制中心”子图的DNBR值表明烧伤严重程度较低。

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