Steven K. Frey
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View article: Investigating terrestrial water storage change in a western Canadian river basin with GRACE/GRACE-FO and fully-integrated groundwater–surface water modelling
Investigating terrestrial water storage change in a western Canadian river basin with GRACE/GRACE-FO and fully-integrated groundwater–surface water modelling Open
As hydrological trends shift in response to a warming climate, accurate characterization of hydrologic conditions and hydrologic change are imperative for water resources management, which is particularly important in the Canadian Prairies…
View article: Economic valuation of subsurface water contributions to watershed ecosystem services using a fully integrated groundwater–surface-water model
Economic valuation of subsurface water contributions to watershed ecosystem services using a fully integrated groundwater–surface-water model Open
Water is essential for all ecosystem services, yet a comprehensive assessment and economic valuation of total (overall) water contributions to ecosystem services' production using a fully integrated groundwater–surface-water model has neve…
View article: Quantifying the potential of using Soil Moisture Active Passive (SMAP) soil moisture variability to predict subsurface water dynamics
Quantifying the potential of using Soil Moisture Active Passive (SMAP) soil moisture variability to predict subsurface water dynamics Open
Advances in satellite Earth observation have opened up new opportunities for global monitoring of soil moisture (SM) at fine to medium resolution, but satellite remote sensing can only measure the near-surface soil moisture (SSM). As such,…
View article: Development of a fully integrated hydrological fate and transport model for plant protection products: incorporating groundwater, tile drainage, and runoff
Development of a fully integrated hydrological fate and transport model for plant protection products: incorporating groundwater, tile drainage, and runoff Open
Introduction Plant protection products (PPPs) such as pesticides and herbicides are experiencing increased use worldwide. In the context of PPP authorization and registration, water exposure assessments (drinking water and aquatic exposure…
View article: Comment on hess-2023-309
Comment on hess-2023-309 Open
Abstract. Advances in satellite Earth observation have opened up new opportunities for a global monitoring of soil moisture (SM) at fine to medium resolution, but satellite remote sensing can only measure the near-surface soil moisture (SS…
View article: Comment on hess-2023-309
Comment on hess-2023-309 Open
Abstract. Advances in satellite Earth observation have opened up new opportunities for a global monitoring of soil moisture (SM) at fine to medium resolution, but satellite remote sensing can only measure the near-surface soil moisture (SS…
View article: Quantifying the potential of using SMAP soil moisture variability to predict subsurface water dynamics
Quantifying the potential of using SMAP soil moisture variability to predict subsurface water dynamics Open
Advances in satellite Earth observation have opened up new opportunities for a global monitoring of soil moisture (SM) at fine to medium resolution, but satellite remote sensing can only measure the near-surface soil moisture (SSM). As suc…
View article: Canada1Water research and development phase 1 report
Canada1Water research and development phase 1 report Open
View article: Mega‐Tidal and Surface Flooding Controls on Coastal Groundwater and Saltwater Intrusion Within Agricultural Dikelands
Mega‐Tidal and Surface Flooding Controls on Coastal Groundwater and Saltwater Intrusion Within Agricultural Dikelands Open
Climate change will increase sea levels, driving saltwater into coastal aquifers and impacting coastal communities and land use viability. Coastal aquifers are also impacted by tides that control groundwater‐ocean interactions and maintain…
View article: Influence of landscape position and climatic seasonality on soil water and gas conductivity properties in agricultural soils
Influence of landscape position and climatic seasonality on soil water and gas conductivity properties in agricultural soils Open
Agricultural landscape management and climate seasonality can influence soil structure, hydraulic conductivity, and air permeability within the context of soil water and soil gas mobility. To investigate this, in situ and laboratory-based …
View article: Quantifying the linkage between SMAP soil moisture and fully-integrated hydrologic simulations
Quantifying the linkage between SMAP soil moisture and fully-integrated hydrologic simulations Open
This dataset contains soil moisture (SM) (over multiple layers between 0‒100 cm depth) and groundwater (GW) storage simulated by a high resolution fully-integrated surface water - groundwater model HydroGeoSphere (HGS) over the South Natio…
View article: Quantifying the linkage between SMAP soil moisture and fully-integrated hydrologic simulations
Quantifying the linkage between SMAP soil moisture and fully-integrated hydrologic simulations Open
This dataset contains soil moisture (SM) (over multiple layers between 0‒100 cm depth) and groundwater (GW) storage simulated by a high resolution fully-integrated surface water - groundwater model HydroGeoSphere (HGS) over the South Natio…
View article: Comment on hess-2023-25
Comment on hess-2023-25 Open
Abstract. Water is essential for all ecosystem services, yet a comprehensive assessment of total (overall) water contributions to ecosystem services production has never been attempted. Quantification of the many ecosystem services impacte…
View article: Monetizing the role of water in sustaining watershed ecosystem services using a fully integrated subsurface–surface water model
Monetizing the role of water in sustaining watershed ecosystem services using a fully integrated subsurface–surface water model Open
Water is essential for all ecosystem services, yet a comprehensive assessment of total (overall) water contributions to ecosystem services production has never been attempted. Quantification of the many ecosystem services impacted by water…
View article: Talking about trees: the territorial classification of native forests in the Argentinian Chaco
Talking about trees: the territorial classification of native forests in the Argentinian Chaco Open
Deforestation represents an important contributor to climate change. For this reason, identifying conditions that enable the adoption of policies halting or reversing this process is crucial to avoid catastrophic climate change. The Argent…
View article: Physical-based hydrological modelling for real-time forecasting of soil moisture in a mesoscale catchment
Physical-based hydrological modelling for real-time forecasting of soil moisture in a mesoscale catchment Open
<p>Soil moisture is highly variable in space and time. Climate change is expected to increase the variation in precipitation that may cause more frequent extremes in soil moisture. This will have major impacts on agriculture and infr…
View article: Dual‐permeability modeling of preferential flow and snowmelt partitioning in frozen soils
Dual‐permeability modeling of preferential flow and snowmelt partitioning in frozen soils Open
The infiltrability of frozen soils modulates the partitioning of snowmelt between infiltration and runoff in cold regions. Preferential flow in macropores may enhance infiltration, but flow dynamics in frozen soil are complicated by soil h…
View article: Validation of SMOS, SMAP, and ESA CCI Soil Moisture Over a Humid Region
Validation of SMOS, SMAP, and ESA CCI Soil Moisture Over a Humid Region Open
With recent advances in satellite microwave soil moisture estimation, there is a demand for up-to-date validation of satellite soil moisture products. This article presents a sparse network validation over a humid region within the Laurent…
View article: Application of machine learning techniques for regional bias correction of snow water equivalent estimates in Ontario, Canada
Application of machine learning techniques for regional bias correction of snow water equivalent estimates in Ontario, Canada Open
Snow is a critical contributor to Ontario's water-energy budget, with impacts on water resource management and flood forecasting. Snow water equivalent (SWE) describes the amount of water stored in a snowpack and is important in deriving e…
View article: Application of machine learning techniques for regional bias correction of SWE estimates in Ontario, Canada
Application of machine learning techniques for regional bias correction of SWE estimates in Ontario, Canada Open
Snow is a critical contributor to Ontario's water-energy budget with impacts on water resource management and flood forecasting. Snow water equivalent (SWE) describes the amount of water stored in a snowpack and is important in deriving es…
View article: Evaluation of variability among different precipitation products in the Northern Great Plains
Evaluation of variability among different precipitation products in the Northern Great Plains Open
Study region: The Northern Great Plains. Study focus: Seasonal and extreme hydro-climatological events in the Northern Great Plains can have significant socio-economic impacts. Although a variety of precipitation datasets can be used for c…
View article: Reactive Transport of Manure‐Derived Nitrogen in the Vadose Zone: Consideration of Macropore Connectivity to Subsurface Receptors
Reactive Transport of Manure‐Derived Nitrogen in the Vadose Zone: Consideration of Macropore Connectivity to Subsurface Receptors Open
Core Ideas Manure N transformation was modeled with different soil pore connectivities to tile drains. Macropores facilitated NH 4 + oxidation reaction products deeper in the profile. Nitrate losses to tile were best predicted by models us…
View article: Simulating Climate Change Impacts on Surface Water Resources Within a Lake‐Affected Region Using Regional Climate Projections
Simulating Climate Change Impacts on Surface Water Resources Within a Lake‐Affected Region Using Regional Climate Projections Open
This study aims to assess the impact of climate change on water resources in a large watershed within the Laurentian Great Lakes region, using the fully integrated surface‐subsurface model HydroGeoSphere. The hydrologic model is forced wit…
View article: Long-Term Observations of Nitrogen and Phosphorus Export in Paired-Agricultural Watersheds under Controlled and Conventional Tile Drainage
Long-Term Observations of Nitrogen and Phosphorus Export in Paired-Agricultural Watersheds under Controlled and Conventional Tile Drainage Open
Controlled tile drainage (CTD) regulates water and nutrient export from tile drainage systems. Observations of the effects of CTD imposed en masse at watershed scales are needed to determine the effect on downstream receptors. A paired-wat…