A5080682852- Peatlands and Wetlands Ecology
- Hydrology and Watershed Management Studies
- Fire effects on ecosystems
- Coastal wetland ecosystem dynamics
- Soil and Water Nutrient Dynamics
- Climate change and permafrost
- Plant Water Relations and Carbon Dynamics
- Botany and Plant Ecology Studies
- Soil erosion and sediment transport
- Cryospheric studies and observations
- Ecology and biodiversity studies
- Soil Carbon and Nitrogen Dynamics
- Groundwater and Isotope Geochemistry
- Remote Sensing and LiDAR Applications
- Soil and Unsaturated Flow
- Fish Ecology and Management Studies
- Groundwater flow and contamination studies
- Atmospheric and Environmental Gas Dynamics
- Geology and Paleoclimatology Research
- Marine and coastal ecosystems
- Landslides and related hazards
- Aquatic Ecosystems and Phytoplankton Dynamics
- Hydrology and Sediment Transport Processes
- Archaeology and Natural History
- Marine and environmental studies
University of Alberta
2015-2024
University of New Brunswick
2022-2024
Delaware Department of Natural Resources and Environmental Control
2010
University of Waterloo
2008
University of Toronto
1996-1997
Aurora College
1996
Trent University
1989
Abstract The efficiency with which riparian zones remove nitrate (NO − 3 ) from contaminated ground water can vary landscape setting. This study was conducted to determine the influence of flood plain geometry, lithology, hydrologic flow path, and transport on mechanisms depletion water. Patterns NO −N, chloride, dissolved organic carbon (DOC) concentrations δ 15 N‐NO 18 O‐NO values in combination detailed piezometric head measurements were investigated a river floodplain connected large...
Abstract Peatlands are poorly represented in global Earth system modeling frameworks. Here we add a peatland‐specific land surface hydrology module (PEAT‐CLSM) to the Catchment Land Surface Model (CLSM) of NASA Goddard Observing System (GEOS) framework. The amended TOPMODEL approach original CLSM that uses topography characteristics model catchment processes is discarded, and concept realized its place. To facilitate utilization operational GEOS efforts, PEAT‐CLSM basic structure same input...
Abstract The water balance and runoff regime of a 55 ha aspen‐forested headwater catchment located on the Boreal Plain, Alberta, Canada (55·1°N, 113·8°W) were determined for 5 years following partial timber harvest. Variability in precipitation provided opportunity to contrast balances relatively dry (<350 mm year −1 ), wet (>500 average years. In most years, was dominated by soil storage, evapotranspiration losses, vertical recharge. 1997, despite near‐average annual (486 mm), there...
Abstract The higher mid‐latitudes of the Northern Hemisphere are particularly sensitive to climate change as small differences in temperature determine frozen ground status, precipitation phase, and magnitude timing snow accumulation melt. An international inter‐catchment comparison program, North‐Watch, seeks improve our understanding sensitivity northern catchments by examining their hydrological biogeochemical responses. located Sweden (Krycklan), Scotland (Mharcaidh, Girnock Strontian),...
Abstract Wetlands in the Western Boreal Plain (WBP) of North Central Alberta exist within a moisture‐deficit regime where evapotranspiration (ET) is dominant hydrologic flux. As such these systems are extremely susceptible to slightest climatic variability that may upset balance between precipitation ( P ) and ET. Wetland ET predominantly controlled by vegetation composition but also vary due moisture regimes microclimatic factors. To address this regimes, was examined typical...
The objective of this study was to examine initial effects the 2003 Lost Creek wildfire (southwestern Rocky Mountains Alberta) on concentrations and production (yield total export) several nitrogen (N) forms, explore recovery these within first 3 years after fire. During postfire year, nitrate (NO – ), dissolved organic (DON), (TN) in severely burned watershed streams were 6.5, 4.1, 5.3 times greater, respectively, than those reference streams. Weaker evident for ammonium (NH 4 + ; 1.5...
The Western Boreal Plain of North Central Alberta comprises a mosaic wetlands and aspen (Populus tremuloides) dominated uplands where precipitation (P) is normally exceeded by evapotranspiration (ET). As such these systems are highly susceptible to the climatic variability that may upset balance between P ET. Above canopy (ETC) understory (ETB) were examined using eddy covariance technique situated at 25.5 m (7.5 above tree crown) 4.0 ground surface, respectively. During peak period growing...
Abstract While previous boreal peatland wildfire research has generally reported average organic soil burn depths ranging from 0.05 to 0.20 m, here, we report on deep burning in a the Utikuma Complex forest fire (SWF‐060, ~90 000 ha, May 2011) sub‐humid climate of Alberta's Boreal Plains. Deep was prevalent at margins, where 0.42 ± 0.02 m were fivefold greater than middle peatland. We examined adjacent unburned sections characterize hydrological and hydrophysical conditions necessary account...
Abstract We compared median runoff (R) and precipitation (P) relationships over 25 years from 20 mesoscale (50 to 5,000 km 2 ) catchments on the Boreal Plains, Alberta, Canada, understand controls water sink source dynamics in water‐limited, low‐relief northern environments. Long‐term catchment R efficiency (RP −1 were low varied spatially by an order of magnitude (3 119 mm/year, 1 27%). Intercatchment differences not associated with small variations climate. The partitioning P into...
The following review is the second part of a two series on use remotely sensed data for quantifying wetland extent and inferring or measuring condition monitoring drivers change environments. In first part, we introduce policy makers non-users with an effective feasibility guide how can be used. current review, explore more technical aspects processing analysis using case studies within literature. Here describe: (a) technologies used assessment monitoring; (b) latest algorithmic...
Abstract The relative contributions to total actual evapotranspiration (AET) from pond and riparian areas in a pond‐wetland complex the Western Boreal Plain (WBP) of northern Alberta are measured using Bowen ratio energy balance technique. Measurements show that typical WBP evaporates at rate more than twice adjacent peatland. Relating potential over both surfaces yields Priestley–Taylor α coefficients 0·69 1·11 for peatland respectively. Further results demonstrate sheltering turbulent...
A fully coupled, integrated surface water/groundwater model was used to study hydrologic controls on lake‐groundwater interaction in the subhumid, Boreal Plains of northern Alberta, Canada. Findings from a previous water budget indicate that lakes outwash landscape capture groundwater as major source input and function evaporation windows. Transient responses flow‐through style lake flow system were simulated for three‐dimensional model. Hydraulic heads, depth, corresponding exchange fluxes...
Abstract Wetlands form 14% of the Canadian landscape and, consequently, have considerable interaction with hydrological resources, including water quantity and quality, both within downstream them. Most these are peatlands, particularly in boreal northern environments, been well researched recently. New data also exist for mineral wetlands (e.g. prairie sloughs). Relatively little attention has given to coastal wetlands, or complicated systems Western Cordillera. This paper reviews current...
Abstract Wildfire is the largest disturbance affecting peatland ecosystems and can typically result in combustion of 2–3 kg C m −2 near‐surface peat. We hypothesized that organic soil burn severity, as well associated carbon emissions, varies significantly a function hydrogeological setting due to groundwater impacts on peat bulk density moisture content. measured depth (DOB) three peatlands located along topographic gradient Alberta's Boreal Plains. Peatland margins across all settings...