1. 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

2. Water Management & Climate Change in the Okanagan—Study Framework, 2002-04

3. Okanagan Climate Change Scenario: Implications for Water Management

4. 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

5. IDStationElev (m) Record 11120633Bankier Chain Lake102074-88 21123360Hedley51770-01 31123750Joe Rich Creek87570-93 41123970Kelowna A43068-01 51123984Kelowna East49180-97 61123992Kelowna PC Burnetts35070-92 71124112Keremeos 243579-94 81124980McCullogh125087-96 91125223Mt Kobau Observatory186266-80 101125865Osoyoos West29770-01 111126077Peachland Brenda Mines152070-90 121126150Penticton A35460-01 131127800Summerland CDA45560-95 141128551Vernon55671-94 151128580Vernon CR48270-97 161128958Winfield50374-01 171126784Falkland Spanish Lake82359-81 181126785Fa1kland Salmon Valley63575-84

6. Climate Change Scenarios for 50 °N, 120°W

8. Whiteman Ck: CSIRO A2

11. 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 2002-04 Study on UBC Web site: http://www.sdri.ubc.ca/publications 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...