Potential Climate Change Impacts on Water Resources in the Okanagan Basin, British Columbia: Hydrolo - PowerPoint PPT Presentation

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Potential Climate Change Impacts on Water Resources in the Okanagan Basin, British Columbia: Hydrolo

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... knowledge of the volume and timing of abstractions from ... Difficulty in accurately modelling hydrologic response in semi-arid basins. Okanagan Basin Model ... – PowerPoint PPT presentation

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Title: Potential Climate Change Impacts on Water Resources in the Okanagan Basin, British Columbia: Hydrolo


1
Potential Climate Change Impacts on Water
Resources in the Okanagan Basin, British
Columbia Hydrologic Modelling
  • Younes Alila and Wendy Merritt
  • 30th October 2002
  • Department of Forest Resources Management
  • University of British Columbia

2
Hydrologic Component
  • Development of a hydrologic model for the 8000
    km2 Okanagan Basin
  • Outcome scenarios of hydrologic changes for the
    Okanagan Basin accounting for both climate change
    and land use change
  • Hydrologic scenarios used as input to explore
    scenarios of water demand and supply and
    potential impacts to institutions

3
Modelling Challenges
  • Limited coverage of climate stations in higher
    elevation zones
  • Relatively few sites measuring unregulated
    hydrometric data
  • Limited knowledge of the volume and timing of
    abstractions from lakes, reservoirs, and rivers
    in the basin
  • Interactions between groundwater recharge at the
    upper elevations and the quantity of runoff that
    finds its way (eventually) into Okanagan Lake
  • Difficulty in accurately modelling hydrologic
    response in semi-arid basins

4
Okanagan Basin Model
  • Development of the hydrologic model will involve
    three major steps
  • Calibration to ascertain both climate
    transferability and geographic transferability
  • Regionalisation develop relationships between
    model parameters and watershed characteristics
  • Basin Model link the sub-watershed models to the
    routing network and reservoir models
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