Water sustainability under climate change and increasing demand: a one water approach at a watershed scale

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Water will become Canada's foremost ecological crisis early in this century (Schindler 2001). A watershed based approach for water management is repeatedly suggested to address water sustainability issues. However, full implementation of such an approach is seldom realized. Achieving a full understanding of total water resources (climate, surface water, shallow and deep groundwater etc.) and their interactions at a watershed scale is a major barrier. We propose to take a one-water perspective to evaluate watershed sustainability under climate change and increasing socio-economic drivers of water demands (agriculture and population) in the Deep Creek watershed (306 km2) located in the Okanagan basin of the semi-arid southern interior of British Columbia. The suitable watershed size and significant water conflicts among water users make this watershed