Wildfire impact on disinfection byproduct precursor loading in mountain streams and rivers

Hickenbottom, Kenneth; Pagilla, Krishna; Hanigan, David

doi:10.1016/j.watres.2023.120474

Cited by 6 publications

(7 citation statements)

References 56 publications

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“…The impact of wildfires on surface waters has been well‐documented, and elevated concentrations of contaminants are commonly seen (Beyene et al., 2023; Hickenbottom et al., 2023), along with increased turbidity (J. Chen & Chang, 2023; Emmerton et al., 2020) and changes in pH (Costa et al., 2014; Granath et al., 2021), all of which pose a risk to both natural and human systems. Karst systems make up 7%–12% of the terrestrial earth surface, and ∼25% of the world's population rely on karst aquifers for their water supply (Ford & Williams, 2007; Hartmann et al., 2014).…”

Section: Discussionmentioning

confidence: 99%

“…The impact of wildfires on surface waters has been well-documented, and elevated concentrations of contaminants are commonly seen (Beyene et al, 2023;Hickenbottom et al, 2023), along with increased turbidity (J. Chen & Chang, 2023;Emmerton et al, 2020) and changes in pH (Costa et al, 2014;Granath et al, 2021), all of which pose a risk to both natural and human systems.…”

Section: Implications For Surface and Groundwatersmentioning

confidence: 99%

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Combustion Completeness and Sample Location Determine Wildfire Ash Leachate Chemistry

Campbell,

Treble,

McDonough

et al. 2024

Geochem Geophys Geosyst

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Understanding past fire regimes and how they vary with climate, human activity, and vegetation patterns is fundamental to the mitigation and management of changing fire regimes as anthropogenic climate change progresses. Ash‐derived trace elements and pyrogenic biomarkers from speleothems have recently been shown to record past fire activity in speleothems from both Australia and North America. This calls for an empirical study of ash geochemistry to aid the interpretation of speleothem palaeofire proxy records. Here we present analyses of leached ashes collected following fires in southwest and southeast Australia. We include a suite of inorganic elemental data from the water‐soluble fraction of ash as well as a selection of organic analytes (pyrogenic lipid biomarkers). We also present elemental data from leachates of soils collected from sites in southwest Australia. We demonstrate that the water‐soluble fraction of ash differs from the water‐soluble fraction of soils, with trace and minor element concentrations in ash leachates varying with combustion completeness (burn severity) and sample location. Changes in some lipid biomarker concentrations extracted from ashes may reflect burn severity. Our results contribute to building a process‐based understanding of how speleothem geochemistry may record fire frequency and severity, and suggest that more research is needed to understand the transport pathways for the inclusion of pyrogenic biomarkers in speleothems. Our results also demonstrate that potential contaminant loads from ashes are much higher than from soils, with implications for the management of karst catchments, which are a critical water resource.

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Section: Discussionmentioning

confidence: 99%

Section: Implications For Surface and Groundwatersmentioning

confidence: 99%

Combustion Completeness and Sample Location Determine Wildfire Ash Leachate Chemistry

Campbell,

Treble,

McDonough

et al. 2024

Geochem Geophys Geosyst

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“…For DOC, 55% of the studies found that DOC concentrations were higher in burned watersheds and remained elevated throughout their study period (e.g. Crandall et al, 2021;Hickenbottom et al, 2023;Murphy et al, 2018;Oliver et al, 2012). Meanwhile, 27% of studies observed an immediate effect of elevated DOC concentrations, especially during flushing events, and then found DOC levels declined to background conditions (e.g.…”

Section: Discussionmentioning

confidence: 99%

“…Across spatial scales, wildfire has been documented to increase solute concentrations by orders of magnitude in some receiving streams (Hickenbottom et al, 2023;Murphy et al, 2018), but lead to little response or decline in others (Abbott et al, 2021;Oliver et al, 2012). This may be due to differences in wildfire and/or watershed characteristics.…”

mentioning

confidence: 99%

Catchment characteristics modulate the influence of wildfires on nitrate and dissolved organic carbon across space and time: A meta-analysis

Cavaiani,

Regier,

Roebuck

et al. 2024

Preprint

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Climate change is driving earlier seasonal onset of wildfire, increased fire frequency, and larger fires in many regions globally (Flannigan et al., 2009;Westerling, 2016). Wildfires induce changes in ecohydrological processes, including reduced infiltration from increased soil hydrophobicity (DeBano, 2000), and reduced canopy cover that diminishes evapotranspiration and interception of precipitation (Guo et al., 2023;Wine et al., 2018). The resulting changes in streamflow and terrestrial-aquatic connectivity from these shifts in ecohydrological processes influence the composition and fluxes of materials to stream networks, with the potential to degrade downstream water quality (

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“…Another recent study by Hickenbottom et al investigated wildfire impacts on DBP precursor loading in mountain streams and rivers from the Caldor and Mosquito Fires in California in 2021 and 2022, respectively . Both fires resulted in increased DOC, dissolved organic nitrogen, and DBP precursors in the receiving rivers following rain events compared to nearby unburned watersheds.…”

Section: Drinking Water and Swimming Pool Disinfection Byproductsmentioning

confidence: 99%

Water Analysis: Emerging Contaminants and Current Issues

Richardson,

Manasfi

2024

Anal. Chem.

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BACKGROUND AND TRENDSThis biennial review covers developments in water analysis for emerging environmental contaminants mainly over the period of September 2021−December 2023 (with a few in early 2024). Analytical Chemistry's policy is to limit reviews to a maximum of ∼250 significant references and to mainly focus on new trends. Therefore, only a small fraction of the quality research publications are discussed. The previous Water Analysis review (with Thomas Ternes) was published in 2022. 1 This year, Tarek Manasfi joined to cover the section on pharmaceuticals and hormones. We welcome any comments you have on this Review

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Wildfire impact on disinfection byproduct precursor loading in mountain streams and rivers

Cited by 6 publications

References 56 publications

Combustion Completeness and Sample Location Determine Wildfire Ash Leachate Chemistry

Combustion Completeness and Sample Location Determine Wildfire Ash Leachate Chemistry

Catchment characteristics modulate the influence of wildfires on nitrate and dissolved organic carbon across space and time: A meta-analysis

Water Analysis: Emerging Contaminants and Current Issues

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