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SPARROW_Areas_w_Loads
nutrientsSPARROW ModelBasinsMap displays Total Phosphorus loads (aggregated load in kg) in the Chesapeake Bay, Mississippi River, and Pacific Northwest basins.
<font color='#000000' size='3'><span style='font-family:"Segoe UI", wf_segoe-ui_normal, helvetica, arial, sans-serif;'>The phosphorus loads used in these visualizations are based on data from the </span><font face='Segoe UI, wf_segoe-ui_normal, helvetica, arial, sans-serif'><span style='background-image:initial; background-position:0px 0px; background-size:initial; background-repeat:initial; background-attachment:initial; background-origin:initial; background-clip:initial;'>USGS SPAtially Referenced Regression On Watershed attributes (SPARROW) model</span></font><span style='font-family:"Segoe UI", wf_segoe-ui_normal, helvetica, arial, sans-serif;'>.</span><span style='font-family:"Segoe UI", wf_segoe-ui_normal, helvetica, arial, sans-serif;'> </span><span style='font-family:"Segoe UI", wf_segoe-ui_normal, helvetica, arial, sans-serif;'>SPARROW was developed to describe long-term (2000–2014) mean-annual total phosphorus (TP) transport in streams of across the US. The nutrient models have a base year of 2012, which means they were developed based on source inputs and management practices similar to those existing during or near 2012 and average hydrological conditions detrended to 2012. Results from 2012 SPARROW models describe how much of each TP source was delivered to the stream network, and the major landscape factors that affected their delivery. Information from these SPARROW models can help guide nutrient reduction strategies. Although local estimates of N loads and sources exist, SPARROW provides a consistent approach to estimate N loads at different spatial scales. More information on the SPARROW model and its data can be found </span></font><a href='https://www.usgs.gov/mission-areas/water-resources/science/sparrow-modeling-estimating-nutrient-sediment-and-dissolved' target='_blank' rel='nofollow ugc noopener noreferrer'>here</a><font color='#000000' size='3'><span style='font-family:"Segoe UI", wf_segoe-ui_normal, helvetica, arial, sans-serif;'>.</span></font>USGS, USEPA<div style='font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px;'><div style='margin-bottom:3rem;'><div><div style='overflow:auto; padding-bottom:0.375rem; max-width:100%; display:inherit;'>These data are publicly available for access and use.</div><div><br /></div></div></div></div>
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