Forecasts and Planning Tools

Climate Change Streamflow Scenario Tool

Applications

The Climate Impacts Group (CIG) is tailoring the climate change streamflow scenarios for use in regional scale planning studies at the Northwest Power and Conservation Council (focusing primarily on regional hydropower resources) and Idaho's Department of Water Resources (focusing primarily on irrigation in the Snake River basin).

The methods used for producing the streamflow scenarios in this project are quite portable. For example, the CIG is working with the Washington State Department of Ecology's statewide Watershed Planning Program to help planners and stakeholders understand and quantify the implications of climate change for their watersheds. Although these watersheds are generally much smaller than the Columbia basin (which implies larger uncertainties in projected streamflow changes), the same techniques for scenario development can be applied. Furthermore, although we used the delta method here, these data processing techniques can be used with any global climate model downscaling approach.