BMP Targeting Maps

<p><strong>Open the Data Resource:</strong> <a target='_blank' href='https://cast.chesapeakebay.net/Documentation/BmpTargetingMaps' rel='nofollow ugc noopener noreferrer'>https://cast.chesapeakebay.net/Documentation/BmpTargetingMaps</a></p><p>BMP Targeting Maps have been created using CAST delivery factors and 2024 Progress loads to communicate which land-river segments in the watershed would be most effective for BMP targeting.</p><p>This set of maps depicts loads and delivery factors for nitrogen, phosphorus, and sediment by land-river segment for both agricultural and urban sources.The maps include an interactive bivariate legend to allow users to visualize and filter by both variables simultaneously.</p><p>Delivery factors represent the fate and transport of nutrients and sediment from the land to the water. So, the higher the delivery factor, the higher the amount of nutrients and sediment are likely to run off from that area. There are six bivariate targeting maps, one for each nutrient and sector. The legend on each map has a box with 9 colors, representing the variation of loads and delivery factors in each land-river segment, from low to high. The lightest, bottom square in the legend correlates to the land-river segments on the map that have the lowest loads, and the lowest delivery factors. The square at the top of the legend, which has the darkest coloring, shows the areas that have the highest loads, and the highest delivery factors. These are the areas that would be most effective for BMP targeting.</p><p><a target='_blank' href='https://cast-content.chesapeakebay.net/documents/USGS%20Lunch%20and%20Learn%2020231116.pdf' rel='nofollow ugc noopener noreferrer'>This presentation</a> explains how these data can be used. And <a target='_blank' href='https://gis-data.chesapeakebay.net/downloads/ModelingP6/2023ProgressLoadsAndDeliveryFactorsByLandRiverSegmentForBmpTargetingMaps.zip' rel='nofollow ugc noopener noreferrer'>this link</a> will download a shapefile of the maps to your computer.</p>