2026-09-30 パシフィック・ノースウェスト国立研究所（PNNL）
Fire perimeters for more than 200 large fires since 2020 and the topography of this fire-prone region of the United States. The study showed strong mismatches between where fires occur and where stream water quality data are monitored, guiding follow-on work. (Source: Wall et al. [2026])
＜関連情報＞
- https://www.pnnl.gov/publications/existing-stream-monitoring-locations-not-aligned-pacific-northwest-wildfires
- https://iopscience.iop.org/article/10.1088/3033-4942/ae36cb
米国太平洋岸北西部における山火事後の水質と水生生態系の反応：科学とモニタリングのギャップ Post-wildfire water quality and aquatic ecosystem response in the U.S. Pacific Northwest: science and monitoring gaps
Sara Wall, Jana E Compton, Ashley A Coble, Beth M Haley, Jiajia Lin, Allison Myers-Pigg, Justin Reale, Katie Wampler, Allison Swartz, Kevan Moffett,…
Environmental Research: Water Published: 10 February 2026
DOI:10.1088/3033-4942/ae36cb
Abstract
An increase in the occurrence of large, high severity wildfires in the western Pacific Northwest (PNW), USA, has created an urgent need for science to better inform forest management and policy decisions to maintain source water quality in the region. The western PNW faces similar challenges to other regions with shifting wildfire regimes and large population centers reliant on surface water from forested catchments. However, the uniquely wet and highly seasonal climate of the western PNW suggests that findings from other, more frequently burned regions may not be directly applicable. To identify science, monitoring, and management gaps and opportunities in the western PNW, this review was collaboratively undertaken by academics, non-government and industry representatives, and local, state, and federal government entities who have been working together since the 2020 Labor Day fires in Oregon. Focusing on Oregon and Washington, we found that monitoring networks for continuous water quantity and quality cover much of the state with greater representation in western U.S. ecoregions, but few studies have analyzed and published these data to capture and communicate the post-wildfire response. Approximately half of the streamgages in Oregon and Washington record major water quality parameters, and hundreds of sites in the area have discrete sampling for a wide range of water quality constituents. Still, numerous gaps exist in understanding the short- and long-term impacts of wildfire on hydrology, water chemistry, including pH and dissolved oxygen, mobilization of metals, aquatic ecosystems, and downstream drinking water treatment. Collective action to further collect, analyze, interpret, and publish the key data could help improve our understanding of post-wildfire water quality impacts in this and other increasingly wildfire-affected regions.
