Abstract
The potential effects of climate warming due to increasing atmospheric levels of greenhouse gases are poorly defined. The predicted time frame for significant warming to occur is within the time frame of concern to most water resource planning and development. Some estimates must be made of the potential effects, so that managers and planners may adjust middle and long term policies and programs to deal with reasonable warming scenarios.This study presents a water balance assessment of supply and demand variations for the Oldman River basin in Alberta under a range of climate warming scenarios. The Oldman River basin, as a semi-arid region with intensive water-based development, is regarded as a region with a high-risk of adverse effects due to greenhouse warming. A crop consumptive use model is used to simulate the soil water demands for irrigated crops over the basin under five climate scenarios. Historical irrigation diversion demands are adjusted to reflect the increased crop demands under warming. Th...
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