Comparative Analysis between Remote Sensing Burned Area Products in Brazil: A Case Study in an Environmentally Unstable Watershed

Fire Pub Date : 2024-07-09 DOI:10.3390/fire7070238
Juarez Antonio da Silva Junior, Admilson da Penha Pacheco, A. M. Ruiz-Armenteros, Renato Filipe Faria Henriques
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Abstract

Forest fires can profoundly impact the hydrological response of river basins, modifying vegetation characteristics and soil infiltration. This results in a significant increase in surface flow and channel runoff. In response to these effects, many researchers from different areas of earth sciences are committed to determining emergency measures to rehabilitate river basins, intending to restore their functions and minimize damage to soil resources. This study aims to analyze the mapping detection capacity of burned areas in a river basin in Brazil based on images acquired by AMAZÔNIA-1/WFI and the AQ1KM product. The effectiveness of the AMAZÔNIA-1 satellite in this regard is evaluated, given the importance of the subject and the relatively recent introduction of the satellite. The AQ1KM data were used to analyze statistical trends and spatial patterns in the area burned from 2003 to 2023. The U-Net architecture was used for training and classification of the burned area in AMAZÔNIA-1 images. An increasing trend in burned area was observed through the Mann–Kendall test map and Sen’s slope, with the months of the second semester showing a greater occurrence of burned areas. The NIR band was found to be the most sensitive spectral resource for detecting burned areas. The AMAZÔNIA-1 satellite demonstrated superior performance in estimating thematic accuracy, with a correlation of above 0.7 achieved in regression analyses using a 10 km grid cell resolution. The findings of this study have significant implications for the application of Brazilian remote sensing products in ecology, water resources, and river basin management and monitoring applications.
巴西焚烧区遥感产品对比分析:环境不稳定流域案例研究
森林火灾会严重影响河流流域的水文反应,改变植被特征和土壤渗透。这导致地表流量和河道径流量显著增加。针对这些影响,地球科学不同领域的许多研究人员正致力于确定恢复流域的应急措施,以恢复其功能并最大限度地减少对土壤资源的破坏。本研究旨在根据 AMAZÔNIA-1/WFI 和 AQ1KM 产品获取的图像,分析巴西某流域烧毁区域的绘图探测能力。考虑到这一主题的重要性以及该卫星的推出时间较短,对 AMAZÔNIA-1 号卫星在这方面的有效性进行了评估。AQ1KM 数据用于分析 2003 年至 2023 年烧毁面积的统计趋势和空间模式。使用 U-Net 架构对 AMAZÔNIA-1 图像中的烧毁面积进行训练和分类。通过 Mann-Kendall 检验图和 Sen's 坡度,观察到烧毁面积呈上升趋势,第二学期的月份烧毁面积更大。研究发现,近红外波段是检测焚烧区最灵敏的光谱资源。AMAÔZNIA-1 卫星在估计专题准确性方面表现出卓越的性能,在使用 10 公里网格单元分辨率进行回归分析时,相关性达到 0.7 以上。这项研究的结果对巴西遥感产品在生态学、水资源、流域管理和监测方面的应用具有重要意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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