20210721 13502200 1.0 TRUE SPARROW Delivered Phosphorus - Top 25% Catchments This dataset contains mean-annual total Phosphorus (TP) fluxes predicted by the SPARROW model, CBTP_v4, for individual stream and shoreline reaches in the Chesapeake watershed as defined by NHDPlus, a 1:100,000 scale representation of stream hydrography built upon the National Hydrography Dataset (NHD) (Horizon Systems, 2010; Simley and Carswell, 2010). USGS