South Saskatchewan River Basin Integrated Hydrologic Model
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This one page overview provides a summary of the work being done by researchers at Aquanty as part of their project to analyze the South Saskatchewan River Basin (SSRB). Once a 3D model of the basin has been constructed, simulations to determine the movement of water can be run using their HydroGeoSphere technology, identifying areas at risk for flood or drought.
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South Saskatchewan River Basin Integrated Hydrologic Model
- 1. South Saskatchewan River Basin Integrated Hydrologic Model: Year 2 Progress Synopsis Nested Basin Approach • Large river basin models strain the limits of current computing power. • Improved spatial resolution is realized by generating smaller models of higher resolution. Hierarchy of Spatial Scale Overview • 3-D geological model constructed. • Physical properties applied to land surface and subsurface. • Average monthly climate conditions 2009-2013 applied to date. • Major hydrological processes implemented include: precipitation, evapotranspiration, snow accumulation, snow melt, overland and subsurface flow. • Outputs include soil moisture saturation, groundwater levels, stream flow, and snow accumulation. A Suite of Hydrological Outputs Flood Risk and Mitigation Work in Progress • Input of daily climate data. • Irrigation simulation. • Reservoir operations simulation. • Field scale simulations. • Assimilation of measured data (calibration). South Saskatchewan River Basin (SSRB) location map showing the Oldman River Basin (ORB), Bow River Basin (BRB), Red Deer River Basin (RDRB), and the Lower South Saskatchewan River Basin (LSSRB). Red Deer River Basin • soil moisture Oldman River Basin • depth to groundwater Winter Processes • Snow accumulation and melt • Frozen ground Sub-basin Model Construction Hydrological Risk to Pasture HGS simulations for evaluating flood mitigation strategies. Modeled using high melting rate Modelled using low melting rateObserved conditions from satellite High resolution finite element models were generated for the four major sub-basins: (1) Red Deer River, (2) Bow River, (3) Oldman River, and (4) Lower South Saskatchewan River. Snow accumulation and melt model will be calibrated using remotely sensed snow cover data and point source snow survey measurements. Snow cover in blue and bare ground in brown. References Allen, R.G., L.S. Pereira, D. Raes and M. Smith. 1998. Crop evapotranspiration - guidelines for computing crop water requirements. FAO Irrigation and Drainage Paper No. 56, Rome, Italy. Major River Basin ~100,000’s km2 Sub-basin ~10,000’s km2 Regional Scale ~100-1000’s km2 Field – Soil Column Scale ~1 km2 The SSRB HGS model is actually a set of models at varying scales. Evapotranspiration (ET) Location of DYMAC pasture growth study sites (green squares), AAF pasture growth study sites (blue circles) and irrigation districts (pink polygons). • Solar radiation-based potential ET. • Dual crop coefficient approach for evaporation and transpiration. • Includes root water uptake adjusted for soil moisture. Crop coefficient curves showing the basal (Kcb), soil evaporation (Ke), and single crop coefficient (Kc) (after Allen et al., 1998). • Correlate hydrologic conditions to pasture yield. • Improve production resiliency under variable climate (flood/drought). HGS simulations for assessing local flood risk in Medicine Hat, AB.