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Integrated Surface and Subsurface Hydrological Modeling with Snowmelt and Pore Water Freeze-Thaw.
Oliver S Schilling, Young-Jin Park1, René Therrien2
1Aquanty Inc., Waterloo, Ontario, N2L 5C6, Canada.
Ground Water
|November 6, 2018
Summary
This study integrates efficient winter hydrological process simulation, including snowmelt and freeze-thaw, into a fully-coupled surface water-groundwater model. This advances catchment-scale hydrological modeling in cold regions.
Area of Science:
- Hydrology
- Environmental Science
- Computational Modeling
Background:
- Existing hydrological models for winter conditions are either computationally intensive or overly simplified.
- A need exists for efficient, integrated models that capture key winter processes.
Purpose of the Study:
- To integrate a computationally efficient winter hydrological process module into a fully-integrated surface water-groundwater flow model.
- To enable efficient simulation of catchment-scale hydrology in regions affected by winter processes.
Main Methods:
- Incorporation of snowfall, snow accumulation, snowmelt (degree-day method), and pore water freeze-thaw (vertical heat conduction) into HydroGeoSphere.
- Utilized a fully-coupled surface water-groundwater flow model for integration.
Main Results:
- Successfully integrated winter hydrological processes into the HydroGeoSphere model.
- Demonstrated the model's capability through a freeze-thaw benchmark and two case studies.
Conclusions:
- The integrated model provides an efficient solution for simulating winter hydrological processes at the catchment scale.
- This approach bridges the gap between computationally expensive and simplified winter hydrological models.
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