A Regional Modeling Framework of Phosphorus Sources and Transport in Streams of the Southeastern United States.

ABSTRACT: We applied the SPARROW model to estimate phosphorus transport from catchments to stream reaches and subsequent delivery to major receiving water bodies in the Southeastern United States (U.S.). We show that six source variables and five land-to-water transport variables are significant (p<0.05) in explaining 67% of the variability in long-term log-transformed mean annual phosphorus yields. Three land-to-water variables are a subset of landscape characteristics that have been used as transport factors in phosphorus indices developed by state agencies and are identified through experimental research as influencing land-to-water phosphorus transport at field and plot scales. Two land-to-water variables - soil organic matter and soil pH - are associated with phosphorus sorption, a significant

SUBMITTER: Garcia AM 

PROVIDER: S-EPMC3307618 | biostudies-literature | 2011 Oct

REPOSITORIES: biostudies-literature