Wildfires increasingly impact western US fluvial networks.

Wildfires increasingly impact western US fluvial networks.
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DOI:
10.1038/s41467-021-22747-3
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发表时间:
2021-04-30
影响因子:
16.6
通讯作者:
Van Horn D
Van Horn D
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Ball G;Regier P;González-Pinzón R;Reale J;Van Horn D

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野火在全球范围内的频率、严重程度和范围都在增加,但它们对河流网络的影响及其提供的资源仍不清楚。我们结合联合收割机遥感燃烧周长和严重程度,现场水质监测和纵向建模,以创建第一个大规模的,长期的估计流+河流长度受野火影响的美国西部。我们发现,在1984年至2014年期间,野火直接影响了总河流长度的6%,并以每年342公里的速度增长。当包括水质影响的纵向传播时,我们估计野火影响了总溪流+河流长度的约11%。我们的研究结果表明,野火活动是水生损害的最大驱动因素之一,尽管监管机构没有定期报告,因为野火对河流网络的影响仍然不受限制。我们确定了解决这一知识差距的关键行动,并更好地了解对河流网络,水安全和公共卫生风险日益增长的威胁。作者调查了野火对美国西部河流网络的影响。他们发现,在1984年至2014年期间,野火直接影响了约6%的河流总长度。当包括纵向传播时,他们估计野火影响了总河流长度的11%。
Wildfires are increasing globally in frequency, severity, and extent, but their impact on fluvial networks, and the resources they provide, remains unclear. We combine remote sensing of burn perimeter and severity, in-situ water quality monitoring, and longitudinal modeling to create the first large-scale, long-term estimates of stream+river length impacted by wildfire for the western US. We find that wildfires directly impact ~6% of the total stream+river length between 1984 and 2014, increasing at a rate of 342 km/year. When longitudinal propagation of water quality impacts is included, we estimate that wildfires affect ~11% of the total stream+river length. Our results indicate that wildfire activity is one of the largest drivers of aquatic impairment, though it is not routinely reported by regulatory agencies, as wildfire impacts on fluvial networks remain unconstrained. We identify key actions to address this knowledge gap and better understand the growing threat to fluvial networks, water security, and public health risks. The authors investigate the impacts of wildfires on fluvial networks in the western US. They find that wildfires directly impacted ~6% of the total stream length between 1984 and 2014. When longitudinal propagation was included, they estimate that wildfires affected ~11% of the total stream length.
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