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The Columbia Basin Climate Change Scenarios Project (CBCCSP) is designed to serve as a comprehensive hydrological database to support climate change planning, impact assessment, and adaptation in the Pacific region. Northwest (PNW) is developed by a diverse user community with technical capabilities varying over a wide spatial range. Standards. The study built a sophisticated and comprehensive data processing sequence from “raw” climate. The model is output to a set of hydrological modeling products that are provided to the user community from a web-accessible database. Implementation of 1/16 degree latitude and longitude resolution for the VIC hydrological model
over the Columbia River Basin to produce historical simulations and 77 future hydrological projections. Associated with three different statistical downscaling methods and three future time periods (2020, 2040, and 2020)1980s). Key products from the study include summary data for approximately 300 river sites in the PNW and
Monthly GIS products for 21 hydrological variables over the entire study area.
Study results show profound changes in spring snow and fundamental shifts of snow and ice. Mixed rain and snow behavior to rain-dominant behavior over most of the field. Associated transitions in flow. The timing from spring-summer to winter also appears in basins with significant snow accumulation. Winter (for current climate). Potential evapotranspiration increases over most of the PNW in summer. Due to high temperatures; However, actual evaporation is reduced in all but a few water areas. Because evaporation is mostly limited by water in summer, rainfall is less in summer Simulation. Simulating large-scale increases in soil moisture recharge in autumn and winter in areas where significant snow accumulation is not possible in winter (relative to the current climate) supports hypotheses of increased landslide risk and sediment transport in future winters. The intensity of the flood simulations and very low flows increases for the most part. Locations of the rivers included in the study. The largest increases in flooding occur in mixed rain and snow basins. Current mid-winter temperatures are within a few degrees of freezing. The CBCCSP database has been valuable. Public resources have significantly reduced costs in a number of high-definition studies in the PNW and the West
The United States focused on technical coordination and planning.