Science Research & Publications
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Utility of a multi-tracer approach as a component of adaptive monitoring for municipal wastewater impacts
(IWA Publishing, Science, Geoscience, University of Calgary, https://iwaponline.com/open_access, publishedVersion, 2020-06-16)Distinguishing municipal wastewater effluent (MWWE) from other industrial effluents or through an urbanized watershed can be challenging. In complex receiving environments, linking environmental responses to specific ... -
Methane oxidation and methylotroph population dynamics in groundwater mesocosms
(Society for Applied Microbiology and John Wiley & Sons Ltd., Science, Geoscience, University of Calgary, https://sfamjournals.onlinelibrary.wiley.com/doi/10.1111/1462-2920.14929, publishedVersion, 2020-01)Extraction of natural gas from unconventional hydrocarbon reservoirs by hydraulic fracturing raises concerns about methane migration into groundwater. Microbial methane oxidation can be a significant methane sink. Here, ... -
Biogeochemical evidence of anaerobic methane oxidation and anaerobic ammonium oxidation in a stratified lake using stable isotopes
(Copernicus Publications, Science, Geoscience, University of Calgary, https://www.biogeosciences.net/policies/licence_and_copyright.html, publishedVersion, 2020-10-23)Nitrate pollution of freshwaters and methane emissions into the atmosphere are crucial factors in deteriorating the quality of drinking water and in contributing to global climate change. The n-damo (nitrite-dependent ... -
Decadal Delays in Groundwater Recovery from Nitrate Contamination Caused by Low O2Reduction Rates
(Wiley Periodicals, Inc. on behalf of the American Geophysical Union, Science, Geoscience, University of Calgary, https://www.agu.org/Publish-with-AGU/Publish/Author-Resources/Policies/Permission-policy, publishedVersion, 2018-11-13)Nitrate (NO urn:x-wiley:wrcr:media:wrcr23708:wrcr23708-math-0001) is one of the main pollutants in agriculturally impacted groundwater systems. The availability and reactivity of electron donors control the prevalent redox ... -
Foliage Chemistry of Pinus baksiana in the Athabasca Oil Sands Region, Alberta, Canada
(MDPI, Science, Geoscience, University of Calgary, https://www.mdpi.com/about/openaccess, publishedVersion, 2016-12-08)Industrial emissions in the Athabasca Oil Sands Region (AOSR), Alberta, Canada, have caused concerns about the effect of oil sands operations on the surrounding terrestrial environments, including jack pine (Pinus banksiana ... -
Redox controls on methane formation, migration and fate in shallow aquifers
(Copernicus Publications, Science, Geoscience, University of Calgary, https://www.hydrology-and-earth-system-sciences.net/policies/licence_and_copyright.html, publishedVersion, 2016-07-12)Development of unconventional energy resources such as shale gas and coalbed methane has generated some public concern with regard to the protection of groundwater and surface water resources from leakage of stray gas from ... -
Vadose Zone Gas Migration and Surface Effluxes after a Controlled Natural Gas Release into an Unconfined Shallow Aquifer
(John Wiley & Sons, Ltd, Science, Geoscience, University of Calgary, https://authorservices.wiley.com/open-research/open-access/index.html, publishedVersion, 2018-12)Core Ideas Subsurface gas migration results in localized surficial CH4 releases. Surficial CH4 emissions show pronounced temporal variations. Methane concentrations in soil gas exceed lower explosive limits at low leakage ... -
Controls on the Isotopic Composition of Nitrite (δ15N and δ18O) during Denitrification in Freshwater Sediments
(Nature Research, Science, Geoscience, University of Calgary, https://www.springernature.com/gp/open-research/policies/journal-policies, publishedVersion, 2019-12-16)The microbial reduction of nitrate, via nitrite into gaseous di-nitrogen (denitrification) plays a major role in nitrogen removal from aquatic ecosystems. Natural abundance stable isotope measurements can reveal insights ... -
Environmental Groundwater Vulnerability Assessment in Urban Water Mines (Porto, NW Portugal)
(Multidisciplinary Digital Publishing Institute, Science, Geoscience, University of Calgary, https://www.mdpi.com/about/openaccess, publishedVersion, 2016-11-03)A multidisciplinary approach was developed to estimate urban groundwater vulnerability to contamination combining hydrogeology, hydrogeochemistry, subterranean hydrogeotechnics, groundwater ecotoxicology and isotope tracers. ... -
Fugitive Gas Migration in the Vadose Zone at an Experimental Field Site in the Montney Shale Gas Region
(Wiley Subscription Services, Inc., Science, Geoscience, University of Calgary, https://www.agu.org/Publish-with-AGU/Publish/Author-Resources/Policies/Permission-policy, publishedVersion, 2022-01)Fugitive gas migration (GM) from compromised oil and gas wells remains a global concern. To understand environmental impacts from GM there is a need to characterize the transport and fate of fugitive gas in the vadose zone. ...