Water Management & Climate Change in the Okanagan Region, Canada: Climate Scenarios & Hydrologic Modeling Stewart Cohen, Adaptation & Impacts Research.

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Presentation transcript:

Water Management & Climate Change in the Okanagan Region, Canada: Climate Scenarios & Hydrologic Modeling Stewart Cohen, Adaptation & Impacts Research Group, Environment Canada Wendy Merritt & Younes Alila, Department of Forest Resources Management, UBC Mark Barton & Bill Taylor, Pacific & Yukon Region, Environment Canada Presented at Scenarios Workshop, University of Washington Seattle, April 30, 2003

Water Management & Climate Change in the Okanagan—Study Framework,

Okanagan Climate Change Scenario: Implications for Water Management

Hydrology Model Selection AdvantagesConstraints DHSVMFully distributed, explicitly represents  topography  vegetation processes Maximum recommended pixel size of 30m  30m Detailed spatial and temporal inputs UBC Watershed Model Can be applied to individual tributaries of Okanagan Lake Minimal input requirements Semi-distributed conceptual model  simplistic representation of vegetation processes, and topography VICRoutinely linked with Global Climate Change models  applications include the Columbia Basin, of which the Okanagan River is a tributary Minimum recommended pixel size of 1/8 th degree  this resolution is too coarse to adequately distinguish between many of the tributaries entering Okanagan Lake

IDStationElev (m) Record Bankier Chain Lake Hedley Joe Rich Creek Kelowna A Kelowna East Kelowna PC Burnetts Keremeos McCullogh Mt Kobau Observatory Osoyoos West Peachland Brenda Mines Penticton A Summerland CDA Vernon Vernon CR Winfield Falkland Spanish Lake Fa1kland Salmon Valley

Climate Change Scenarios for 50 °N, 120°W

Whiteman Ck: CSIRO A2

Stakeholder views on adaptation Engaging dialogue to identify adaptation strategies to scenarios of streamflow reductions during the growing season in the Okanagan Basin Cohen & Kulkarni (2001), & Interim Report of Study on UBC Web site: Preferred adaptation options among the stakeholders? S tructural (e.g. building upland dams) and social measures (e.g., buy out water licenses) preferred over institutional measures Some implications of their choices? Stakeholders identified the high cost of dams, associated impacts on fisheries, and difficulties in restricting development as possible implications of their adaptation choices.  adaptation dialogue is just beginning...