{ "culture": "en-US", "name": "NSinkOutputs", "guid": "C705D459-1446-4CCF-B434-11282357DD24", "catalogPath": "", "snippet": "Analytical outputs derived from running the N-Sink tool across 36 watersheds in southern New England. ", "description": "The Nitrogen Removal Efficiency Mapclassifies individual water features of a watershed based on how efficient they are at removing nitrogen. Efficiency (removal rate) is based primarily on applying relevant hydrographic information to each N-Sink flow path segment to calculate residence time. Streams, rivers, ponds, lakes and other impoundments are color-coded as low (0% -25%), medium(>25% -50%) or high (>50%) removal. Wetland soils are another prominent watershed feature that removes N, but no single efficiency estimate can be applied to all wetlands since the residence time of a water particle is unique for each flow path. Estimates from the literature and used by N-Sink range from <30% to >80% depending on the length of flow path, using a range of distances from 25\u2013100 feet. Wetland soil removal efficiency thus overlaps the medium and high ranges.\n\nThe Nitrogen Transport Efficiency map(aka \u201cHeat Map\u201d)estimates what percentage of N applied to any given location in the watershed is expected to ultimately reach the receiving waters. It is based on N-Sink\u2019s particle tracking, applied to discrete transport reaches along the flow path and their respective N removal efficiencies. This tool can be used for a single user-defined point or points: the user clicks on a location on the map, and the tool generates a flow path from that location allowing the user to see the N sinks that the flow path encounters and to calculate the relative percentage of source N that is removed by these sinks. Currently, the tool uses an arbitrary N source value of 100 for this calculation. The heat maps are based on an interpolation of N-Sink results for data points calculated in a 100-meter grid.\n\nThe Nitrogen Delivery Index is a relative measure of how much N is being delivered to the receiving waters from each location in the watershed. N loading rates taken from the literature are applied to each of the land cover classes of the National Land Cover Dataset (30m resolution), and normalized to a number between 0 and 1. This number is then multiplied by the N Transport Efficiency (above, calculated in a 30m grid), which estimates the amount of the N load that will reach the receiving waters. The result is the Nitrogen DeliveryIndex, a number between 0 and 100 that allows the user to compare the relative contributions of different locations in the watershed to N pollution.", "summary": "Analytical outputs derived from running the N-Sink tool across 36 watersheds in southern New England. ", "title": "NSinkOutputs", "tags": [ "Nsink", "nitrogen", "removal", "transport", "delivery" ], "type": "Map Service", "typeKeywords": [ "Data", "Service", "Map Service", "ArcGIS Server" ], "thumbnail": "thumbnail/thumbnail.png", "url": "", "extent": [ [ -72.9225437024834, 40.9619622971598 ], [ -71.0934704647817, 42.1758800393567 ] ], "spatialReference": "unknown", "accessInformation": "University of Connecticut, University of Rhode Island", "licenseInfo": "" }