Water Resources Research Act Program

Details for Project ID 2006AK51B

Investigation of Streamflow Response to Seasonal Snowcover Change in the Yukon River

Institute: Alaska
Year Established: 2006 Start Date: 2006-03-01 End Date: 2009-02-28
Total Federal Funds: $75,387 Total Non-Federal Funds: $21,777

Principal Investigators: Daqing Yang

Project Summary: The Yukon is one of the largest rivers in the northern regions. It contributes 203 Km3/year of freshwater to the Bering Sea. Hydrologic conditions and their changes in the Yukon River significantly affect regional biologic and ecologic systems. Snowcover is one of the critical land memory processes that significantly impact atmosphere, hydrology and ecosystems in the high latitude regions. Snowcover melt and associated floods are the most important hydrologic events of the year in the northern river basins. Our current understanding of Yukon River hydrology and climate changes, particularly large-scale snowmelt processes and their interaction with climatic change and variation, is incomplete. This limits our capability to document past change and to predict future change over this largest watershed in Alaska. This research will apply remote sensing and in-situ snowcover data and products for snowcover and snowmelt runoff analyses over the Yukon watershed. The focus is to examine the streamflow response to snowcover change during the spring melt season, and to determine the potential of using remotely sensed snowcover information to improve our capability of snowmelt runoff modeling and forecasting over large northern regions.