Online Research Seminars – Hydrology 4

Following last week’s Biogeosciences Annual General Meeting, we are pleased to announce the final Hydrology session for this Friday, August 28 starting at 2:30 pm eastern time. I invite you to follow the series on our Facebook, Twitter and/or LinkedIn pages for the latest information.

To attend this week’s research talks, please join via this link:
Passcode: 938442

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Webinar ID: 830 8110 6141
Passcode: 938442
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This week’s research talks include:

“Using stable water isotopes to examine streamwater contributions in agricultural catchments”
Speaker: Larissa Gospodyn
Affiliation: Ryerson University (student talk)
Time: 2:35 pm – 2:50 pm EDT
Session: Catchment hydrological and biogeochemical behaviour in human-dominated landscapes
This study looks at both annual streamwater contributions and event-scale contributions across three agricultural catchments in Southern Ontario with varying soil types and tile drainage presence. Understanding the dominant annual water contributions can improve water management, but understanding the age of event water is especially useful when implementing nutrient management strategies.

“Exploring variations in concentration-discharge relationships across watersheds in Ontario”
Speaker: Georgina Kaltenecker
Affiliation: University of Toronto (student talk)
Time: 2:50 pm – 3:05 pm EDT
Session: Catchment hydrological and biogeochemical behaviour in human-dominated landscapes
Understanding the relationship between chemical concentrations (i.e. stream water quality) and flow at a broad regional scale may provide insight into factors that contribute to the mobilization and transport of chemicals to tributaries. In this study, we analyzed concentration-discharge (C-Q) relationships for eight water quality parameters using long-term stream water quality and quantity records along a gradient of watershed types across Ontario. Our findings indicate that the nature of this relationship can change at a certain flow threshold. Our study also examines whether watershed characteristics (including physiography and land use) explain the variation in C-Q patterns found. Findings from this study will advance our understanding of the interplay between catchment characteristics and hydrochemistry.

“Hydrological and landscape controls on total and methylmercury export in undisturbed boreal forest headwater catchments”
Speaker: Wai Ying Lam
Affiliation: University of Toronto Scarborough (student talk)
Time: 3:05 pm – 3:20 pm EDT
Session: Catchment hydrological and biogeochemical behaviour in human-dominated landscapes
We examined mercury export in 14 headwater streams and found that patterns in mercury concentration were regional according to land cover and soil type. Understanding variations in mercury export under undisturbed conditions helps us more accurately assess how boreal watersheds may be impacted by natural and anthropogenic disturbances.

“Hydrologic and Water Isotope Characterization of three mesoscale Precambrian Shield watersheds in Ontario, Canada”
Speaker: Arghavan Tafvizi
Affiliation: Laurentian University (student talk)
Time: 3:20 pm – 3:35 pm EDT
Session: Coupled representation of natural-human water systems: Integration of land and hydrological processes into socioeconomic decisions
We investigated the spatial and temporal variability of hydrologic processes across three Boreal Shield watersheds (27 river catchments) through observed variation in stable isotopes (and discharge) in relation to a regional stable isotope framework and assessed the influence of landscape characteristics in the three watersheds (Sturgeon River, French River and Muskoka River) located in central and northeastern Ontario, Canada. Overall, this study aimed to improve the understanding of variability in hydrological processes in mesoscale, Boreal Shield watersheds.

“After six years, what do we know about the hydrological functioning of the recently constructed Sandhill Fen Watershed in Canada’s Athabasca oil sands?”
Speaker: Kelly Biagi
Affiliation: McMaster University (student talk)
Time: 3:35 pm – 3:50 pm EDT
Session: Rebuilding the Critical Zone: Hydrological and biogeochemical developments of reclaimed landscapes
– High water tables, degraded peat and elevated salinity are considerable barriers to the long-term success of constructed peatlands in the Athabasca oil sands region
– Results suggest that the constructed Sandhill Fen Watershed is transitioning away from a fen-peatland which will impact its long-term success

“Effects of Mixed Landuse on Total Phosphorus Transport in a Canadian Shield River”
Speaker: April James
Affiliation: Nipissing University
Time: 3:50 pm – 4:05 pm EDT
Session: Catchment hydrological and biogeochemical behaviour in human-dominated landscapes
We investigated seasonal and annual total phosphorus loading for a mixed landuse mesoscale Canadian shield watershed using a surrogate modeling approach based on turbidity and discharge. TP loads from the Wasi river in northeastern Ontario are heaviest during spring freshet and autumn, similar to other humid, cold-climate regions in the U.S. and Scandinavia, and ranged from 0.15-0.31 kg/ha/yr. Annual loads were significantly higher than undisturbed forested catchments, but were not as high as heavily agricultural watersheds. This study characterizes a watershed type and size that has limited representation in the current scientific literature and is anticipated to be useful to regional land managers tasked with water source protection.