USING A MODELING SYSTEM TO EXTEND HYDROLOGIC PARAMETERS AND PROCESSES FROM EXPERIMENTAL WATERSHEDS TO LARGER REGIONS WITHIN THE GREAT BASIN
Northwest Watershed Management Research
2009 Annual Report
1a.Objectives (from AD-416)
1) Apply the modified Penn State Integrated Hydrology Modeling (PIHM) system over RCEW using all available data;.
2)Selectively reduce input data to determine the minimum input forcing data required to achieve acceptable simulation accuracy;.
3)Recommend augmentation of existing measurement facilities and models that would be required to achieve this level of simulation accuracy over the larger Great Basin region.
1b.Approach (from AD-416)
The scientist funded through this project will work with university and ARS hydrologists to integrate the NWRC snow model into the PIHM system, and implement and evaluate the modified PIHM system at the RCEW. Located at the NWRC in Boise Idaho, the scientist would work collaboratively with the WATERS team to evaluate the accuracy and reliability of PIHM simulations using complete and successively limited RCEW forcing data. The 48-year data record will allow testing over a full range of climate conditions. Documents SCA with UC Santa Barbara.
This project is just beginning and will assess how climate warming is likely to impact water supplies in the western U.S., and then develop a new and more effective approach to simulation modeling to improve how the Northwest Watershed Research Center forecasts and manages water resources in the region. Though a Post Doc has just recently been hired, significant progress has already been made in assessing the impacts of climate warming utilizing 50 years of very high quality data from Reynolds Creek Experimental Watershed. Initial tests of the new model indicate that it can be effectively applied over mountain basins, and that it will improve assessment of water resources under a wide range of climate conditions. Research progress and status are reported via regular conferences calls, meetings and frequent email. This project supports the accomplishment of CRIS objective 3: Develop improved coupling of surface and below-ground models for spatial simulation of snowmelt, runoff, soil temperature and moisture, and streamflow.