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Article: Determination of sediment sources following a major wildfire and evaluation of the use of color properties and polycyclic aromatic hydrocarbons (PAHs) as tracers.

Kieta, K A / Owens, P N / Petticrew, E L

2023 Volume 23, Issue 12, Page(s) 4187–4207

Abstract: Purpose: This research aimed to determine if a severe wildfire caused changes in the source of sediment being delivered to downstream aquatic systems and evaluate the use of polycyclic aromatic hydrocarbons (PAHs) and color properties as tracers.: ... ...

Abstract	Purpose: This research aimed to determine if a severe wildfire caused changes in the source of sediment being delivered to downstream aquatic systems and evaluate the use of polycyclic aromatic hydrocarbons (PAHs) and color properties as tracers. Methods: Sediment samples were collected from 2018 to 2021 in three tributaries impacted by the 2018 Shovel Lake wildfire and from two sites on the mainstem of the Nechako River, British Columbia. Source samples were collected from burned and unburned soils as well as from channel banks and road-deposited sediment. Samples were analyzed for color properties and for the 16 US Environmental Protection Agency priority PAHs. After statistical tests to determine the conservatism and ability to discriminate between sources by the tracers, the MixSIAR unmixing model was used, and its outputs were tested using virtual mixtures. Result: In the tributaries, burned topsoil was an important contributor to sediment (up to 50%). The mainstem Nechako River was not influenced as significantly by the fires as the greatest contributor was banks (up to 89%). The color properties provided more realistic results than those based on PAHs. Conclusion: In smaller watersheds, the wildfire had a noticeable impact on sediment sources, though the impacts of the fire seemed to be diluted in the distal mainstem Nechako River. Color tracers behaved conservatively and discriminated between contrasting sources. Due to their low cost and reliability, they should be considered more widely. While PAHs did not work in this study, there are reasons to believe they could be a useful tracer, but more needs to be understood about their behavior and degradation over time. Supplementary information: The online version contains supplementary material available at 10.1007/s11368-023-03565-0.
Language	English
Publishing date	2023-07-04
Publishing country	Germany
Document type	Journal Article
ZDB-ID	2050898-0
ISSN	1614-7480 ; 1439-0108
ISSN (online)	1614-7480
ISSN	1439-0108
DOI	10.1007/s11368-023-03565-0
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Article ; Online: Post-wildfire contamination of soils and sediments by polycyclic aromatic hydrocarbons in north-central British Columbia, Canada

Kieta, K. A. / Owens, P. N. / Petticrew, E. L.

International Journal of Wildland Fire. 2023, v. 32, no. 7 p.1071-1088

2023

Abstract: Background The Nechako River Basin (NRB) is a large, regulated basin in north-central British Columbia, Canada that has been impacted by numerous landscape disturbances, including a severe wildfire in 2018. Aims The aims of this study were to quantify ... ...

Abstract	Background The Nechako River Basin (NRB) is a large, regulated basin in north-central British Columbia, Canada that has been impacted by numerous landscape disturbances, including a severe wildfire in 2018. Aims The aims of this study were to quantify the post-wildfire temporal and spatial extent of contamination by polycyclic aromatic hydrocarbons (PAHs) of both soils and riverine sediments, and to identify the primary sources of PAHs in the watershed. Methods Soil samples were collected at burned and unburned sites in 2018 and at the burned sites in 2020 and 2021. Sediment samples were collected at three tributaries impacted by wildfire and three Nechako River mainstem (i.e. main channel) sites from 2018 to 2021. Samples were analysed for parent PAHs. Key results PAH concentrations decreased in soil samples from 2018 to 2021 but are not below the concentrations found in unburned samples. Tributary sediment samples showed higher concentrations immediately post-fire relative to the mainstem Nechako River, but in the years since, that trend has reversed. Conclusions PAHs persist in terrestrial and aquatic environments for years following wildfire, but at concentrations below various quality guidelines. PAHs were primarily derived from the wildfires, with some mixed sources at the downstream sites. Implications Wildfires are an important source of environmental contamination of terrestrial and aquatic environments.
Keywords	basins ; landscapes ; pollution ; riparian areas ; rivers ; sediments ; soil ; watersheds ; wildfires ; British Columbia ; Nechako River Basin ; polycyclic aromatic hydrocarbons ; post-wildfire contamination ; regional scale ; soils ; soil pollutants ; suspended sediment ; water pollutants ; water quality ; watershed
Language	English
Size	p. 1071-1088.
Publishing place	CSIRO Publishing
Document type	Article ; Online
ZDB-ID	1331562-6
ISSN	1448-5516 ; 1049-8001
ISSN (online)	1448-5516
ISSN	1049-8001
DOI	10.1071/WF22211
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Article ; Online: Annual pulses of copper-enriched sediment in a North American river downstream of a large lake following the catastrophic failure of a mine tailings storage facility.

Owens, P N / Petticrew, E L / Albers, S J / French, T D / Granger, B / Laval, B / Lindgren, J / Sussbauer, R / Vagle, S

The Science of the total environment

2022 Volume 856, Issue Pt 1, Page(s) 158927

Abstract: Failures of mine tailings storage facilities (TSF) can have profound and long-lasting effects on the downstream receiving environment. Virtually all spills to date have been into river systems without large lakes that may buffer downstream impacts. In ... ...

Abstract	Failures of mine tailings storage facilities (TSF) can have profound and long-lasting effects on the downstream receiving environment. Virtually all spills to date have been into river systems without large lakes that may buffer downstream impacts. In August 2014, the failure of the Mount Polley copper (Cu)-gold mine TSF in British Columbia, Canada, released ~25 × 10
MeSH term(s)	British Columbia ; Copper/analysis ; Environmental Monitoring ; Geologic Sediments/analysis ; Lakes ; Water/analysis ; Water Pollutants, Chemical/analysis
Chemical Substances	Copper (789U1901C5) ; Water (059QF0KO0R) ; Water Pollutants, Chemical
Language	English
Publishing date	2022-09-22
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2022.158927
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Article: Annual pulses of copper-enriched sediment in a North American river downstream of a large lake following the catastrophic failure of a mine tailings storage facility

Owens, P.N. / Petticrew, E.L. / Albers, S.J. / French, T.D. / Granger, B. / Laval, B. / Lindgren, J. / Sussbauer, R. / Vagle, S.

Science of the total environment. 2022 Sept. 18,

2022

Abstract	Failures of mine tailings storage facilities (TSF) can have profound and long-lasting effects on the downstream receiving environment. Virtually all spills to date have been into river systems without large lakes that may buffer downstream impacts. In August 2014, the failure of the Mount Polley copper (Cu)-gold mine TSF in British Columbia, Canada, released ~25 × 10⁶ m³ of water and solids; globally, this is the second largest TSF spill in history. Over 18 × 10⁶ m³ was delivered to Quesnel Lake, which is ~9 km from the TSF and is the third deepest lake in North America, and a crucial habitat for Pacific salmon and trout populations. We determined the sediment-associated Cu concentrations and fluxes in Quesnel River, downstream of the lake, from August 2014 to February 2021 based on the analysis of >400 samples of sediment, mainly collected using a continuous-flow centrifuge. During each winter since the spill, Cu concentrations in the fluvial sediment in the upper reaches of the river (~35 km from the TSF) were elevated relative to regional background concentrations and samples collected before the spill. Maximum Cu concentrations were ~410 mg kg⁻¹ which exceeds Canadian sediment quality guidelines for the protection of aquatic organisms (197 mg kg⁻¹). Monitoring of Quesnel Lake since the spill shows that these annual pulses in the winter are due to resuspension of unconsolidated tailings and sediments at the bottom of Quesnel Lake, during autumnal lake turnover, which become mixed throughout the water column and subsequently flow into Quesnel River. Results show that while large lakes may buffer downstream aquatic systems from contaminated sediment, they may prolong the environmental impact. These findings are crucial in understanding how lake processes may modify the effects of TSF spills on downstream aquatic systems.
Keywords	Oncorhynchus ; copper ; environment ; environmental impact ; habitats ; lakes ; rivers ; sediment contamination ; sediments ; trout ; winter ; British Columbia
Language	English
Dates of publication	2022-0918
Publishing place	Elsevier B.V.
Document type	Article
Note	Pre-press version
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2022.158927
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Article ; Online: The bacterial community of Quesnel Lake sediments impacted by a catastrophic mine tailings spill differ in composition from those at undisturbed locations - two years post-spill.

Hatam, I / Petticrew, E L / French, T D / Owens, P N / Laval, B / Baldwin, S A

Scientific reports

2019 Volume 9, Issue 1, Page(s) 2705

Abstract: The West Basin of Quesnel Lake (British Columbia, Canada) suffered a catastrophic disturbance event in August 2014 when mine tailings and scoured natural material were deposited into the lake's West Basin due to an impoundment failure at the adjacent ... ...

Abstract	The West Basin of Quesnel Lake (British Columbia, Canada) suffered a catastrophic disturbance event in August 2014 when mine tailings and scoured natural material were deposited into the lake's West Basin due to an impoundment failure at the adjacent Mount Polley copper-gold mine. The deposit covered a significant portion of the West Basin floor with a thick layer of material. Since lake sediments host bacterial communities that play key roles in the geochemical cycling in lacustrine environments, it is important to understand which groups inhabit the newly deposited material and what this implies for the ecological function of the West Basin. Here we report a study conducted two years post-spill, comparing the bacterial communities from sediments of both disturbed and undisturbed sites. Our results show that sediments from disturbed sites differed in physical and chemical properties than those in undisturbed sites (e.g. higher pH, particle size and Cu concentration). Furthermore, bacterial communities from the disturbed sites appeared to be legacy communities from the tailings impoundment, with metabolic potential revolving mainly around the cycling of S and metals, whereas the ones from the undisturbed sites were associated with the cycling of N.
MeSH term(s)	Bacteria/isolation & purification ; Environmental Monitoring/methods ; Geologic Sediments/microbiology ; Habits ; Lakes
Language	English
Publishing date	2019-02-25
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-019-38909-9
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Article ; Online: Sources of variability in fatty acid (FA) biomarkers in the application of compound-specific stable isotopes (CSSIs) to soil and sediment fingerprinting and tracing: A review.

Reiffarth, D G / Petticrew, E L / Owens, P N / Lobb, D A

The Science of the total environment

2016 Volume 565, Page(s) 8–27

Abstract: Determining soil redistribution and sediment budgets in watersheds is often challenging. One of the methods for making such determinations employs soil and sediment fingerprinting techniques, using sediment properties such as geochemistry, fallout ... ...

Abstract	Determining soil redistribution and sediment budgets in watersheds is often challenging. One of the methods for making such determinations employs soil and sediment fingerprinting techniques, using sediment properties such as geochemistry, fallout radionuclides, and mineral magnetism. These methods greatly improve the estimation of erosion and deposition within a watershed, but are limited when determining land use-based soil and sediment movement. Recently, compound-specific stable isotopes (CSSIs), which employ fatty acids naturally occurring in the vegetative cover of soils, offer the possibility of refining fingerprinting techniques based on land use, complementing other methods that are currently in use. The CSSI method has been met with some success; however, challenges still remain with respect to scale and resolution due to a potentially large degree of biological, environmental and analytical uncertainty. By better understanding the source of tracers used in CSSI work and the inherent biochemical variability in those tracers, improvement in sample design and tracer selection is possible. Furthermore, an understanding of environmental and analytical factors affecting the CSSI signal will lead to refinement of the approach and the ability to generate more robust data. This review focuses on sources of biological, environmental and analytical variability in applying CSSI to soil and sediment fingerprinting, and presents recommendations based on past work and current research in this area for improving the CSSI technique. A recommendation, based on current information available in the literature, is to use very-long chain saturated fatty acids and to avoid the use of the ubiquitous saturated fatty acids, C16 and C18.
Language	English
Publishing date	2016-09-15
Publishing country	Netherlands
Document type	Journal Article ; Review
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2016.04.137
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Article: The behavioural characteristics of sediment properties and their implications for sediment fingerprinting as an approach for identifying sediment sources in river basins

Koiter, A.J / Owens, P.N / Petticrew, E.L / Lobb, D.A

Earth-science reviews. 2013 Oct., v. 125

2013

Abstract: Sediment fingerprinting is a technique that is increasingly being used to improve the understanding of sediment dynamics within river basins. At present, one of the main limitations of the technique is the ability to link sediment back to their sources ... ...

Abstract	Sediment fingerprinting is a technique that is increasingly being used to improve the understanding of sediment dynamics within river basins. At present, one of the main limitations of the technique is the ability to link sediment back to their sources due to the non-conservative nature of many of the sediment properties. The processes that occur between the sediment source locations and the point of collection downstream are not well understood or quantified and currently represent a black-box in the sediment fingerprinting approach. The literature on sediment fingerprinting tends to assume that there is a direct connection between sources and sinks, while much of the broader environmental sedimentology literature identifies that numerous chemical, biological and physical transformations and alterations can occur as sediment moves through the landscape. The focus of this paper is on the processes that drive particle size and organic matter selectivity and biological, geochemical and physical transformations and how understanding these processes can be used to guide sampling protocols, fingerprint selection and data interpretation. The application of statistical approaches without consideration of how unique sediment fingerprints have developed and how robust they are within the environment is a major limitation of many recent studies. This review summarises the current information, identifies areas that need further investigation and provides recommendations for sediment fingerprinting that should be considered for adoption in future studies if the full potential and utility of the approach are to be realised.
Keywords	landscapes ; organic matter ; particle size ; sediments ; watersheds
Language	English
Dates of publication	2013-10
Size	p. 24-42.
Publishing place	Elsevier B.V.
Document type	Article
Note	REVIEW
ZDB-ID	1792-9
ISSN	0012-8252
ISSN	0012-8252
DOI	10.1016/j.earscirev.2013.05.009
Database	NAL-Catalogue (AGRICOLA)

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Article: Aggregate stability in organically and conventionally farmed soils

Williams, N.D / Petticrew, E.L

Soil use and management. 2009 Sept., v. 25, no. 3

2009

Abstract: A range of factors that influence aggregate stability and soil erodibility were analysed for soils sampled from land managed under contrasting agricultural methods. These included: an organic farm; a conventional farm that incorporated organic ... ...

Abstract	A range of factors that influence aggregate stability and soil erodibility were analysed for soils sampled from land managed under contrasting agricultural methods. These included: an organic farm; a conventional farm that incorporated organic fertilizers; a conventional farm that only used inorganic fertilizers; and a non-cultivated control site. The stability of aggregates that compose the bulk soil structure (macroaggregates), and aggregates that were mobilized from the soil by simulated rainfall and surface runoff (microaggregates), were evaluated in terms of the soil fragmentation fractal dimension, organic carbon content and ATP (adenosine 5'-triphosphate; a signature of live biomass) concentration. The results were used to interpret the existing physical condition of the soils, the (microbial) processes that contribute to that physical structure, and how both pedogenic processes and existing soil quality are influenced by agricultural methods. The soils sampled for this study were demonstrated to be multi-fractal in nature: soils with greater bulk density were composed of more stable macro-aggregates, which, in turn, fragmented into larger, more stable micro-aggregates, rendering the entire soil structure less erodible. Soil erodibility and sustainable soil management should therefore be approached at multiple scales. The primary control on both macro- and micro-aggregate stability was determined to be the organic matter input to the soil, as represented by measurements of organic carbon and ATP. Organic content was greatest for the non-cultivated soil, which reflects the degradation of organic reserves in cultivated soils. For cultivated soils, it was not possible to differentiate aggregate stability for soils managed under organic or conventional (i.e. using biological and inorganic fertilizers) farming practices, but aggregates of soils that only received artificial fertilizers consistently exhibited less stability.
Keywords	aggregate stability ; erodibility ; organic production
Language	English
Dates of publication	2009-09
Size	p. 284-292.
Publisher	Blackwell Publishing Ltd
Publishing place	Oxford, UK
Document type	Article
ZDB-ID	742151-5
ISSN	1475-2743 ; 0266-0032
ISSN (online)	1475-2743
ISSN	0266-0032
DOI	10.1111/j.1475-2743.2009.00223.x
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Article: Evaluation of iron-phosphate as a source of internal lake phosphorus loadings.

Petticrew, E L / Arocena, J M

The Science of the total environment

2001 Volume 266, Issue 1-3, Page(s) 87–93

Abstract: Biological, physical and chemical characteristics of the water column of a shallow (Zmax = 9.2 m), small (surface area 3.8 km2) residential and recreational lake near Prince George, British Columbia, indicated that the system was being loaded internally ... ...

Abstract	Biological, physical and chemical characteristics of the water column of a shallow (Zmax = 9.2 m), small (surface area 3.8 km2) residential and recreational lake near Prince George, British Columbia, indicated that the system was being loaded internally with phosphorus (P) from the sediments. The abundance of P released from the fine glaciolacustrine, and organic rich sediments was resulting in excess algal and weed growth. It was postulated that iron-phosphate reduction at redox potentials below approximately 200 mV and/or bacterially mediated orthophosphate (PO4-P) releases could be occurring. The development of an appropriate nutrient management strategy required that the process associated with the sediment P release be determined. The MINTEQA2 geochemical model was used to predict the release of orthophosphate (PO4-P) into the interstitial water with the assumption that P is present alternately as strengite, variscite and hydroxyapatite. The predicted release of PO4-P from these P containing minerals was compared to the concentration of PO4-P and total phosphorus (TP) in the overlying hypolimnion. In order to improve the accuracy of the model prediction, the proportion of the sediment present as iron-bound phosphate was estimated. A significant correlation between the observed hypolimnetic TP and interstitial PO4-P concentrations as predicted from iron-bound P dissolution (r2 = 0.59) was found. Total phosphorus release rates to the hypolimnion were also found to be strongly correlated to the iron-bound P component of the sediment (r2 = 0.88). Multivariate regression analyses showed significant relationships between hypolimnetic PO4-P and sediment iron-bound P, Eh, and interstitial Fe (r2 = 0.76). These results provided sufficient evidence to conclude that PO4-P in the system is predominantly bound to Fe-containing minerals and therefore could be managed using treatment techniques that address iron-bound phosphates.
MeSH term(s)	Environmental Monitoring ; Environmental Pollution/prevention & control ; Eukaryota/physiology ; Iron/chemistry ; Models, Theoretical ; Phosphates/chemistry ; Phosphorus/analysis ; Water Pollutants, Chemical/analysis
Chemical Substances	Phosphates ; Water Pollutants, Chemical ; Phosphorus (27YLU75U4W) ; Iron (E1UOL152H7)
Language	English
Publishing date	2001-02-05
Publishing country	Netherlands
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/s0048-9697(00)00756-7
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Article: Biogeomorphic impacts of migration and disturbance: Implications of salmon spawning and decay

Albers, S.J. / Petticrew, E.L.

Geomorphology

Volume v. 202

Abstract: Geomorphologic processes often involve a biotic element that acts to regulate landform development. This biotic element can be plant or animal-based with a feedback that ultimately benefits the ecology of the organism. Pacific salmon (Oncorhynchus sp.) ... ...

Abstract	Geomorphologic processes often involve a biotic element that acts to regulate landform development. This biotic element can be plant or animal-based with a feedback that ultimately benefits the ecology of the organism. Pacific salmon (Oncorhynchus sp.) are an example of an animal biogeomorphic agent exhibiting such feedbacks and, because of long migrations from the sea to freshwater spawning grounds, are a species of interest that act on both local and regional scales. Upon returning to their natal streams, salmon generate a dual disturbance, resuspending large amounts of sediment as they construct nests while at the same time generating a substantial nutrient pulse through post-spawn die-off and decay. The retention and export of these nutrients are of importance to any hypothesized productivity boost driven by the marine derived nutrients (MDNs). Using experimental enclosures in the Horsefly River spawning channel in north-central British Columbia, our objectives for this study were to i) quantify the magnitude of organic and inorganic sediment export and retention from an active-spawning area and ii) determine the contribution of fine sediment MDN storage. Using a suspended sediment mass balance model, marine isotope enrichment and a time series of gravel bed sediment infiltration, we found strongly linear relationships between sediment infiltration and marine-derived nutrient enrichment. Elevated suspended sediment produced by salmon redd (nest) construction acted as an effective vector for MDN infiltration into the gravel bed. This study demonstrated that localized patterns of sediment deposition are regulated by salmon activity which in turn act to control MDN storage within, and release from, the gravel bed. Furthermore, this study demonstrates the ability of a biogeomorphic agent like salmon to establish a feedback mechanism that creates favorable conditions which ultimately benefit the organism.
Keywords	time series analysis ; isotopes ; sediment transport ; die-off ; landforms ; nests ; gravel ; rivers ; spawning ; models ; nutrients ; suspended sediment ; freshwater ; Oncorhynchus ; salmon ; streams ; sediment deposition
Language	English
Document type	Article
ISSN	0169-555X
Database	AGRIS - International Information System for the Agricultural Sciences and Technology

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