River Corridor Hydrobiogeochemistry from Reaction to Basin Scale
EMSL Project ID
51750
Abstract
The PNNL SBR SFA will transform understanding of spatial and temporal dynamics in river corridor hydrobiogeochemistry from reaction to watershed and basin scales, enabling mechanistic representation of river corridor processes and their responses to disturbances in multiscale models of integrated hydrobiogeochemical function. Biogeochemical processes promoted by river-subsurface hydrologic exchange are critical to river corridor function, yet transferable understanding through space and time is lacking. Process representation in integrated land surface models is limited, cumulative effects of reaction-scale processes on watersheds are poorly understood, and responses to environmental disturbances are unpredictable. Addressing these challenges, we propose four research campaigns nested within a multiscale modeling framework: cumulative effects of governing processes, hydrobiogeochemical variability, disturbance impacts, and multi-basin transferability. Collectively, we are developing mechanistic understanding of river corridor hydrologic and biogeochemical process linkages, integrated into numerical models at scales from reactions to river basins. A key element of our proposed work is understanding impacts of disturbances, with emphasis on wildfires and modified precipitation regimes, both prevalent disturbances that impact river corridor hydrobiogeochemistry. To enhance predictions, we will generate data, knowledge, and models that are transferable across diverse watersheds environments in the Columbia River Basin and other major U.S. river basins. We will use an established open-science approach to develop regional and national partnerships, and will integrate process-based and data-driven models with experiments and observations across scales in coupled iterative learning cycles. Connecting project outcomes to community and interagency efforts will enable robust watershed predictions to address national water challenges and environmental change.
Project Details
Start Date
2020-11-09
End Date
2021-09-30
Status
Closed
Released Data Link
Team
Principal Investigator
Co-Investigator(s)
Team Members