Sediment Equilibrium and Diffusive Fluxes in Relation to Phosphorus Dynamics in the Turbid Minnesota River
Abstract
Much is known regarding the importance of surface and subsurface runoff from agricultural watersheds in the regulation of soluble phosphorus (P) concentration in large river systems. However, in-stream processes such as equilibrium P flux from suspended sediment and diffusive P flux from deposited sediment stored in river channels may also play a role in soluble P control. Ranges in equilibrium partitioning between aqueous and exchangeable particulate P pools associated with suspended and deposited sediment are needed in order to estimate mass transfer coefficients (kd; L kg(-1) and ke; m d(-1) for watershed and receiving water Nutrient Sub-Module (NSM) development within the System-Wide Water Resources Program (SWWRP) of the U.S. Army Engineer Research and Development Center (ERDC). The objectives of this research are: (1) to examine sediment equilibrium and diffusive P fluxes and mass transfer coefficients for suspended and deposited sediment loads, and (2) to place these fluxes within the context of phosphorus dynamics and regulation of soluble P in the Minnesota River.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2009
- Accession Number
- ADA494522
Entities
People
- William F. James
Organizations
- Engineer Research and Development Center