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首页> 外文期刊>Environmental toxicology and chemistry >STORMWATER CONTAMINANT LOADING FOLLOWING SOUTHERN CALIFORNIA WILDFIRES
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STORMWATER CONTAMINANT LOADING FOLLOWING SOUTHERN CALIFORNIA WILDFIRES

机译：南部加州野生动植物之后的暴风雨污染物装载

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摘要

Contaminant loading associated with stormwater runoff from recently burned areas is poorly understood, despite the fact that it has the potential to affect downstream water quality. The goal of the present study is to assess regional patterns of runoff and contaminant loading from wildfires in urban fringe areas of southern California. Postfire stormwater runoff was sampled from five wildfires that each burned between 115 and 658 km2 of natural open space between 2003 and 2009. Between two and five storm events were sampled per site over the first one to two years following the fires for basic constituents, metals, nutrients, total suspended solids, and polycyclic aromatic hydrocarbons (PAHs). Results were compared to data from 16 unburned natural areas and six developed sites. Mean copper, lead, and zinc flux (kg/km~2) were between 112- and 736-fold higher from burned catchments and total phosphorus was up to 921-fold higher compared to unburned natural areas. Polycyclic aromatic hydrocarbon flux was four times greater from burned areas than from adjacent urban areas. Ash fallout on nearby unburned watersheds also resulted in a threefold increase in metals and PAHs. Attenuation of elevated concentration and flux values appears to be driven mainly by rainfall magnitude. Contaminant loading from burned landscapes has the potential to be a substantial contribution to the total annual load to downstream areas in the first several years following fires.
机译：尽管最近焚烧地区的雨水径流有可能影响下游水质，但对其污染负荷知之甚少。本研究的目的是评估加利福尼亚南部城市边缘地区野火的径流和污染物负荷的区域模式。火灾后的雨水径流是从2003年至2009年的五次野火中采样的，每场野火在115至658 km2的自然开放空间之间燃烧。在火灾发生后的头一两年内，每个地点采样了两至五次暴风雨事件。 ，养分，总悬浮固体和多环芳烃（PAH）。将结果与16个未燃自然区和6个发达地点的数据进行了比较。与未燃烧的自然区相比，燃烧的集水区的平均铜，铅和锌通量（kg / km〜2）高112到736倍，总磷高达921倍。燃烧后地区的多环芳烃通量是邻近城市地区的四倍。附近未燃烧流域的灰烬沉降也导致金属和多环芳烃的含量增加了三倍。浓度和通量值升高的衰减似乎主要由降雨幅度驱动。火灾发生后的头几年，来自烧毁景观的污染物负荷可能对下游地区的年度总负荷有很大贡献。

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  • 来源
    《Environmental toxicology and chemistry》 |2012年第11期|2625-2638|共14页
  • 作者

    Eric D. Stein; Jeffrey S. Brown; Terri S. Hogue; Megan P. Burke; Alicia Kinoshita;

  • 作者单位

    Biology Department, Southern California Coastal Water Research Project, Costa Mesa, California, USA;

    Biology Department, Southern California Coastal Water Research Project, Costa Mesa, California, USA;

    Department of Civil and Environmental Engineering, University of California, Los Angeles, California, USA;

    Department of Civil and Environmental Engineering, University of California, Los Angeles, California, USA;

    Department of Civil and Environmental Engineering, University of California, Los Angeles, California, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    fire effects; metals; polyaromatic hydrocarbons; nutrients; stormwater runoff;

    机译：火灾影响;金属;聚芳烃;营养素雨水径流;

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