Citation:

PANGAEA.987646 (dataset in review)

Name: Streamwater chemistry (DOC, nutrients, ions) in wildfire-impacted (2015–2022) and reference streams sampled in spring and fall 2022 in Vancouver Island, Canada
License: https://creativecommons.org/licenses/by/4.0/
Keywords: climate change; DOC; nutrient; Pacific Northwest; water quality/water chemistry; wildfire

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Abstract:

This dataset contains streamwater chemistry and stormflow data that were collected to assess short- to mid-term wildfire impacts on streamwater quality in the seasonal Pacific Coastal Temperate Rainforest. Field campaigns occurred between April - May 2022 and October 2022 - January 2023 and targeted nine historic wildfire areas (fires occurring 2015 - 2022) that span a range of sizes and burn severities. Synoptic grab sampling at baseflow was undertaken at 37 streams (19 burn-affected, 18 reference) to enable paired comparisons; stormflow samples were collected using passive rack samplers that collect water on the rising limb at four sites and automatic ISCO pump samplers at the most recent (2022) fire site. Flows tended to be low because of an ongoing severe drought throughout fall 2022. The dataset includes measured concentrations of dissolved organic carbon (DOC), nutrients (total and dissolved phosphorus and nitrogen, soluble reactive phosphorus, nitrite + nitrate, and ammonium), major cations (calcium, potassium, magnesium, sodium, aluminum) and anions (sulfate, chloride). There are also in situ measurements collected with a YSI multiparameter probe (temperature, pH, dissolved oxygen, specific conductance) and dissolved organic matter (DOM) optical properties (absorbance and fluorescence spectra) measured on a Horiba Aqualog. Derived DOM indices (SUVA254, spectral slopes), parallel factor analysis (PARAFAC) component scores, and fluorescence indices (BIX, HIX) are provided. Catchment characteristics derived from geospatial data are also supplied to contextualize the water quality data, including catchment size, slope, aspect, elevation, burn severity, vegetation type and coverage and soil type. Given the expectation that wildfire prevalence and severity will increase in this traditionally wet region, it is likely that the impacts observed in this study will become both enhanced and more widespread in the future.

Keyword(s):

climate change; DOC; nutrient; Pacific Northwest; water quality/water chemistry; wildfire

Related to:

Government of British Columbia (2024): How BEC Works [webpage]. https://www.for.gov.bc.ca/hre/becweb/system/how/index.html#relationship

Mahaux, Jeremie; Floyd, William; Olefeldt, David; Tank, Suzanne E: Soil leachate data in wildfire-impacted (2015–2022) and reference sites sampled in spring and fall 2022 in Vancouver Island, Canada [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.987745

Mahaux, Jeremie; Floyd, William; Olefeldt, David; Tank, Suzanne E (in prep.): Wildfire influences stream water dissolved organic carbon and nutrients in the seasonal Pacific Coastal Temperate Rainforest.

References:

Huguet, Arnaud; Vacher, L; Relexans, S; Saubusse, S; Froidefond, J M; Parlanti, E (2009): Properties of fluorescent dissolved organic matter in the Gironde Estuary. Organic Geochemistry, 40(6), 706-719, https://doi.org/10.1016/j.orggeochem.2009.03.002

McKnight, Diane M; Boyer, Elizabeth W; Westerhoff, Paul K; Doran, Peter T; Kulbe, Thomas; Andersen, D T (2001): Spectrofluorometric characterization of dissolved organic matter for indication of precursor organic material and aromaticity. Limnology and Oceanography, 46(1), 38-48, https://doi.org/10.4319/lo.2001.46.1.0038

Ohno, Tsutomu (2002): Fluorescence Inner-Filtering Correction for Determining the Humification Index of Dissolved Organic Matter. Environmental Science & Technology, 36(4), 742-746, https://doi.org/10.1021/es0155276

Wang, Tongli; Hamann, Andreas; Spittlehouse, Dave; Carroll, Carlos (2016): Locally Downscaled and Spatially Customizable Climate Data for Historical and Future Periods for North America. PLoS ONE, 11(6), e0156720, https://doi.org/10.1371/journal.pone.0156720

Wilson, Henry F; Xenopoulos, Marguerite A (2009): Effects of agricultural land use on the composition of fluvial dissolved organic matter. Nature Geoscience, 2(1), 37-41, https://doi.org/10.1038/ngeo391

Funding:

Natural Sciences and Engineering Research Council (NSERC), grant/award no. NETGP-494312-16

Coverage:

Median Latitude: 48.754444 * Median Longitude: -123.996309 * South-bound Latitude: 48.409804 * West-bound Longitude: -124.241991 * North-bound Latitude: 49.116689 * East-bound Longitude: -123.630051

Date/Time Start: 2022-04-29T19:00:00 * Date/Time End: 2023-01-25T22:15:00

Minimum ELEVATION: 99.000000 m a.s.l. * Maximum ELEVATION: 620.246603 m a.s.l.

Event(s):

CT_winter * Latitude Start: 48.747513 * Longitude Start: -123.862874 * Latitude End: 48.757647 * Longitude End: -123.825327 * Date/Time Start: 2022-12-26T15:30:00 * Date/Time End: 2023-01-24T23:30:00 * Elevation Start: 140.1 m * Elevation End: 238.5 m * Campaign:

HC_fall * Latitude Start: 48.616792 * Longitude Start: -124.241991 * Latitude End: 48.664966 * Longitude End: -124.216603 * Date/Time Start: 2022-10-28T00:15:00 * Date/Time End: 2022-11-18T00:45:00 * Elevation Start: 78.0 m * Elevation End: 608.9 m * Campaign:

HC_spring * Latitude Start: 48.626875 * Longitude Start: -124.241991 * Latitude End: 48.651069 * Longitude End: -124.216603 * Date/Time Start: 2022-05-16T19:00:00 * Date/Time End: 2022-05-17T01:30:00 * Elevation Start: 154.4 m * Elevation End: 608.9 m * Campaign:

Comment:

This research is funded by NSERC Discovery, NSERC Canada Graduate Research Scholarship – Master's (CGS-M) and Alberta Graduate Excellence Scholarship (AGES)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Mahaux, Jeremie
2	Identification	ID		Mahaux, Jeremie
3	Sample code/label	Sample label		Mahaux, Jeremie
4	LATITUDE	Latitude		Mahaux, Jeremie		Geocode
5	LONGITUDE	Longitude		Mahaux, Jeremie		Geocode
6	DATE/TIME	Date/Time		Mahaux, Jeremie		Geocode – UTC
7	Date/Time local	Date/Time local		Mahaux, Jeremie
8	Type	Type		Mahaux, Jeremie
9	Season	Season		Mahaux, Jeremie
10	Site	Site		Mahaux, Jeremie
11	Status	Status		Mahaux, Jeremie		Burn status
12	Temperature, air	TTT	°C	Mahaux, Jeremie	Multiparameter probe, YSI Xylem Inc., Professional Plus
13	Pressure	Press	atm	Mahaux, Jeremie	Multiparameter probe, YSI Xylem Inc., Professional Plus	Atmospheric Pressure
14	Oxygen, dissolved	DO	%	Mahaux, Jeremie	Multiparameter probe, YSI Xylem Inc., Professional Plus	[%/L]
15	Oxygen, dissolved	DO	mg/l	Mahaux, Jeremie	Multiparameter probe, YSI Xylem Inc., Professional Plus
16	Conductance, specific	Conductance spec	µS/cm	Mahaux, Jeremie	Multiparameter probe, YSI Xylem Inc., Professional Plus
17	pH	pH		Mahaux, Jeremie	Multiparameter probe, YSI Xylem Inc., Professional Plus
18	Fluorescence intensity, parallel factor analysis component 1	Fluorescence intens PARAFAC C1	%	Mahaux, Jeremie	Parallel factor fluorescence spectroscopy (PARAFAC) according to Murphy et al. (2013)
19	Fluorescence intensity, parallel factor analysis component 2	Fluorescence intens PARAFAC C2	%	Mahaux, Jeremie	Parallel factor fluorescence spectroscopy (PARAFAC) according to Murphy et al. (2013)
20	Fluorescence intensity, parallel factor analysis component 3	Fluorescence intens PARAFAC C3	%	Mahaux, Jeremie	Parallel factor fluorescence spectroscopy (PARAFAC) according to Murphy et al. (2013)
21	Fluorescence intensity, parallel factor analysis component 4	Fluorescence intens PARAFAC C4	%	Mahaux, Jeremie	Parallel factor fluorescence spectroscopy (PARAFAC) according to Murphy et al. (2013)
22	Fluorescence intensity, parallel factor analysis component 5	Fluorescence intens PARAFAC C5	%	Mahaux, Jeremie	Parallel factor fluorescence spectroscopy (PARAFAC) according to Murphy et al. (2013)
23	Fluorescence, peak A	F peak A	%	Mahaux, Jeremie	Identified according to Coble (1996)
24	Fluorescence, peak C	F peak C	%	Mahaux, Jeremie	Identified according to Coble (1996)
25	Fluorescence, peak M	F peak M	%	Mahaux, Jeremie	Identified according to Coble (1996)
26	Fluorescence, peak B	F peak B	%	Mahaux, Jeremie	Identified according to Coble (1996)
27	Fluorescence, peak T	F peak T	%	Mahaux, Jeremie	Identified according to Coble (1996)
28	Ratio	Ratio		Mahaux, Jeremie		PeakA/PeakT
29	Ratio	Ratio		Mahaux, Jeremie		PeakC/PeakA
30	Ratio	Ratio		Mahaux, Jeremie		PeakC/PeakM
31	Ratio	Ratio		Mahaux, Jeremie		PeakC/PeakT
32	Humification index	HIX		Mahaux, Jeremie	Calculated from Excitation Emission Matrices (EEMs)	according to Ohno (2002)
33	Biological index	BIX		Mahaux, Jeremie	Calculated from Excitation Emission Matrices (EEMs)	according to Huguet et al. (2009)
34	Fluorescence index	FI		Mahaux, Jeremie	Calculated from Excitation Emission Matrices (EEMs)	according to McKnight et al. (2001)
35	Freshness index	FIX		Mahaux, Jeremie	Calculated from Excitation Emission Matrices (EEMs)	according to Wilson and Xenopoulos (2009)
36	Spectral slope, 275-295 nm	SpSl 275-295 nm	1/µm	Mahaux, Jeremie	Fluorescence spectrometer, AquaLog, HORIBA JobinYvon
37	Suspended solids, total	TSS	mg/l	Mahaux, Jeremie	Filtered [0.7 µm GF/F filter]	weight change
38	Carbon, organic, dissolved	DOC	mg/l	Mahaux, Jeremie	Shimadzu Total Organic Carbon Analyzer (TOC-5000A)
39	Absorbance, 254 nm	Absorbance 254	AU	Mahaux, Jeremie	Fluorescence spectrometer, AquaLog, HORIBA JobinYvon
40	Specific ultraviolet absorbance normalized to DOC, 254 nm, per mass carbon	SUVA254	l/mg/m	Mahaux, Jeremie	Specific UV absorbance 254nm, DOC normalised, Weishaar et al. (2003)
41	Phosphorus, total	TP	µg/l	Mahaux, Jeremie	Automated Ion Analyzer, Lachat QuickChem, QC8500 FIA
42	Phosphorus, dissolved	TDP	µg/l	Mahaux, Jeremie	Automated Ion Analyzer, Lachat QuickChem, QC8500 FIA
43	Phosphorus, reactive soluble	SRP	µg/l	Mahaux, Jeremie	Automated Ion Analyzer, Lachat QuickChem, QC8500 FIA
44	Nitrogen in nitrite + nitrate	N-[NO2]- + [NO3]-	µg/l	Mahaux, Jeremie	Automated Ion Analyzer, Lachat QuickChem, QC8500 FIA
45	Nitrogen, total	TN	µg/l	Mahaux, Jeremie	Automated Ion Analyzer, Lachat QuickChem, QC8500 FIA
46	Nitrogen, total dissolved	TDN	µg/l	Mahaux, Jeremie	Automated Ion Analyzer, Lachat QuickChem, QC8500 FIA
47	Chlorine	Cl	mg/l	Mahaux, Jeremie	Ion Chromatography, Dionex, DX-600
48	Sulfate	[SO4]2-	mg/l	Mahaux, Jeremie	Ion Chromatography, Dionex, DX-600
49	Calcium	Ca	mg/l	Mahaux, Jeremie	ICP-MS, Agilent 7900
50	Potassium	K	mg/l	Mahaux, Jeremie	ICP-MS, Agilent 7900
51	Magnesium	Mg	mg/l	Mahaux, Jeremie	ICP-MS, Agilent 7900
52	Sodium	Na	mg/l	Mahaux, Jeremie	ICP-MS, Agilent 7900
53	Aluminium	Al	mg/l	Mahaux, Jeremie	ICP-MS, Agilent 7900
54	Ammonium	[NH4]+	mg/l	Mahaux, Jeremie	Automated Ion Analyzer, Lachat QuickChem, QC8500 FIA
55	Precipitation, sum	Precip sum	mm	Mahaux, Jeremie	Calculated with data from the Pacific Climate Impacts Consortium (PCIC)	48h rolling sum
56	Precipitation, sum	Precip sum	mm	Mahaux, Jeremie	Calculated with data from the Pacific Climate Impacts Consortium (PCIC)	7 day rolling sum
57	Fire event	Fire event		Mahaux, Jeremie	Extracted from the "Wildfire Fire Perimeters – Historical" geospatial dataset on iMap BC, Government of British Columbia (2022)	Year of fire
58	Catchment name	Catch name		Mahaux, Jeremie	ArcGIS software	Subcatchment
59	ELEVATION	Elevation	m a.s.l.	Mahaux, Jeremie	ArcGIS software	Geocode
60	Area	Area	km²	Mahaux, Jeremie	ArcGIS software
61	Slope	Slope	deg	Mahaux, Jeremie	ArcGIS software	minimum
62	Slope	Slope	deg	Mahaux, Jeremie	ArcGIS software	maximum
63	Slope	Slope	deg	Mahaux, Jeremie	ArcGIS software	mean
64	Elevation, minimum	Elev min	m a.s.l.	Mahaux, Jeremie	ArcGIS software
65	Elevation, maximum	Elev max	m a.s.l.	Mahaux, Jeremie	ArcGIS software
66	Aspect	Aspect	deg	Mahaux, Jeremie	ArcGIS software
67	Aspect	Aspect		Mahaux, Jeremie	ArcGIS software
68	Area	Area	m²	Mahaux, Jeremie	ArcGIS software	Catchment Burned
69	Area	Area	km²	Mahaux, Jeremie	ArcGIS software
70	Area	Area	%	Mahaux, Jeremie	ArcGIS software	Catchment Burned
71	Intensity	Intensity		Mahaux, Jeremie	ArcGIS software	Average Burn Severity Rating
72	Intensity	Intensity		Mahaux, Jeremie	ArcGIS software	Catchment Burn Severity
73	Ecosystem	Ecosystem		Mahaux, Jeremie	Extracted from the "BEC Analysis" geospatial dataset on iMap BC, Government of British Columbia (2022)
74	Area	Area	km²	Mahaux, Jeremie	Extracted from the "Vegetation Resource Inventory" geospatial dataset, Government of British Columbia (2024)	Area harvested for timber since 2007
75	Area	Area	%	Mahaux, Jeremie	Extracted from the "Vegetation Resource Inventory" geospatial dataset, Government of British Columbia (2024)	Area harvested for timber since 2007
76	Area	Area	km²	Mahaux, Jeremie	Extracted from the "Vegetation Resource Inventory" geospatial dataset, Government of British Columbia (2024)	Area harvested for timber, all time
77	Area	Area	%	Mahaux, Jeremie	Extracted from the "Vegetation Resource Inventory" geospatial dataset, Government of British Columbia (2024)	Area harvested for timber, all time
78	Years	Years		Mahaux, Jeremie	Extracted from the "Vegetation Resource Inventory" geospatial dataset, Government of British Columbia (2024)	The year in which a survey was last conducted to determine the harvest status
79	Sand	Sand	%	Mahaux, Jeremie	Extracted using the Soil Information Finder Tool (SIFT), Government of British Columbia (2018)
80	Clay	Clay	%	Mahaux, Jeremie	Extracted using the Soil Information Finder Tool (SIFT), Government of British Columbia (2018)
81	Type	Type	%	Mahaux, Jeremie	Extracted using the Soil Information Finder Tool (SIFT), Government of British Columbia (2018)	Moderately Well Drained Soil
82	Type	Type	%	Mahaux, Jeremie	Extracted using the Soil Information Finder Tool (SIFT), Government of British Columbia (2018)	Non Draining
83	Type	Type	%	Mahaux, Jeremie	Extracted using the Soil Information Finder Tool (SIFT), Government of British Columbia (2018)	Rapidly Drained Soils
84	Type	Type	%	Mahaux, Jeremie	Extracted using the Soil Information Finder Tool (SIFT), Government of British Columbia (2018)	Well Drained Soils
85	Sediments	Sediments	%	Mahaux, Jeremie	Extracted using the Soil Information Finder Tool (SIFT), Government of British Columbia (2018)	Bedrock
86	Sediments	Sediments	%	Mahaux, Jeremie	Extracted using the Soil Information Finder Tool (SIFT), Government of British Columbia (2018)	Colluvial
87	Sediments	Sediments	%	Mahaux, Jeremie	Extracted using the Soil Information Finder Tool (SIFT), Government of British Columbia (2018)	Fluvial
88	Sediments	Sediments	%	Mahaux, Jeremie	Extracted using the Soil Information Finder Tool (SIFT), Government of British Columbia (2018)	Glaciofluvial
89	Sediments	Sediments	%	Mahaux, Jeremie	Extracted using the Soil Information Finder Tool (SIFT), Government of British Columbia (2018)	Till
90	Size fraction > 2 mm, gravel	>2 mm	%	Mahaux, Jeremie	Extracted using the Soil Information Finder Tool (SIFT), Government of British Columbia (2018)
91	Herbs	Herbs	%	Mahaux, Jeremie	Extracted from the "Vegetation Resource Inventory" geospatial dataset, Government of British Columbia (2024)
92	Graminoids	Graminoids	%	Mahaux, Jeremie	Extracted from the "Vegetation Resource Inventory" geospatial dataset, Government of British Columbia (2024)
93	Shrubs	Shrubs	%	Mahaux, Jeremie	Extracted from the "Vegetation Resource Inventory" geospatial dataset, Government of British Columbia (2024)	Low shrubs
94	Broadleaf tree, cover	Broadleaf tree cov	%	Mahaux, Jeremie	Extracted from the "Vegetation Resource Inventory" geospatial dataset, Government of British Columbia (2024)
95	Needleleaved woody cover	Needleleaved woody cover	%	Mahaux, Jeremie	Extracted from the "Vegetation Resource Inventory" geospatial dataset, Government of British Columbia (2024)
96	Trees	Trees	%	Mahaux, Jeremie	Extracted from the "Vegetation Resource Inventory" geospatial dataset, Government of British Columbia (2024)
97	Trees, canopy cover	Canopy cover	%	Mahaux, Jeremie	Extracted from the "Vegetation Resource Inventory" geospatial dataset, Government of British Columbia (2024)	Dense canopy
98	Trees, canopy cover	Canopy cover	%	Mahaux, Jeremie	Extracted from the "Vegetation Resource Inventory" geospatial dataset, Government of British Columbia (2024)	Open canopy
99	Trees, canopy cover	Canopy cover	%	Mahaux, Jeremie	Extracted from the "Vegetation Resource Inventory" geospatial dataset, Government of British Columbia (2024)	Sparse canopy
100	Precipitation, annual mean	MAP	mm	Mahaux, Jeremie	Calculated using ClimateBC, according to Wang et al. (2016)
101	Temperature, annual mean	MAT	°C	Mahaux, Jeremie	Calculated using ClimateBC, according to Wang et al. (2016)
102	Fraction	Frac	%	Mahaux, Jeremie	Extracted from the "BEC Analysis" geospatial dataset on iMap BC, Government of British Columbia (2022)	CDFmm - Coastal Douglas Fir (moist maritime) BEC zone
103	Fraction	Frac	%	Mahaux, Jeremie	Extracted from the "BEC Analysis" geospatial dataset on iMap BC, Government of British Columbia (2022)	CWHmm1 - Coastal Western Hemlock (moist maritime, submontane) BEC zone
104	Fraction	Frac	%	Mahaux, Jeremie	Extracted from the "BEC Analysis" geospatial dataset on iMap BC, Government of British Columbia (2022)	CWHmm2 - Coastal Western Hemlock (moist maritime, montane) BEC zone
105	Fraction	Frac	%	Mahaux, Jeremie	Extracted from the "BEC Analysis" geospatial dataset on iMap BC, Government of British Columbia (2022)	CWHvm2 - Coastal Western Hemlock (very wet maritime, montane) BEC zone
106	Fraction	Frac	%	Mahaux, Jeremie	Extracted from the "BEC Analysis" geospatial dataset on iMap BC, Government of British Columbia (2022)	CWHxm1 - Coastal Western Hemlock (very dry maritime, eastern) BEC zone
107	Fraction	Frac	%	Mahaux, Jeremie	Extracted from the "BEC Analysis" geospatial dataset on iMap BC, Government of British Columbia (2022)	CWHxm2 - Coastal Western Hemlock (very dry maritime, western) BEC zone
108	Area	Area	%	Mahaux, Jeremie	Calculated using ESRI ArcGIS Pro, following the "Burn Area Reflectance Classifcation" (BARC) method, Government of British Columbia (2023)	High Severity Burned Area (numerical burn severity rating = 4)
109	Area	Area	%	Mahaux, Jeremie	Calculated using ESRI ArcGIS Pro, following the "Burn Area Reflectance Classifcation" (BARC) method, Government of British Columbia (2023)	Low Severity Burned Area (numerical burn severity rating = 2)
110	Area	Area	%	Mahaux, Jeremie	Calculated using ESRI ArcGIS Pro, following the "Burn Area Reflectance Classifcation" (BARC) method, Government of British Columbia (2023)	Moderate Severity Burned Area (numerical burn severity rating = 3)
111	Area	Area	%	Mahaux, Jeremie	Calculated using ESRI ArcGIS Pro, following the "Burn Area Reflectance Classifcation" (BARC) method, Government of British Columbia (2023)	Unburned Area (numerical burn severity rating = 1)
112	Vegetation, cover	Veg cov	%	Mahaux, Jeremie	Extracted from the "Vegetation Resource Inventory" geospatial dataset, Government of British Columbia (2024)	Catchment area covered by vegetation of any type
113	Precipitation, sum	Precip sum	mm	Mahaux, Jeremie	Calculated with data from the Pacific Climate Impacts Consortium (PCIC)	24h rolling sum

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

16318 data points

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