U.S. Fish & Wildlife ServiceUpstream watershed condition is very important in determining the nutrient, sediment, and contaminant loads entering a lake. All developed and agricultural land cover categories (disturbance) were added to quantify the amount of disturbed landcover that may negatively affect water quality entering the lake. 1. Assign the amount of disturbance in the contributing watershed: a. Join the attribute table "Archetypes_rawdata_2023-10-12.csv" (LaPierre et al. 2023) to the LAGOS Lakes dataset. b. Eliminate any lakes that do not have a valid watershed value (removes 3253 or 0.7 % of lakes) c. Add the upstream watershed amounts of agricultural and developed landcover "ws_nlcd2016_totalag_pct" and "ws_nlcd2016_totaldev_pct" to get "totdev_totag" d. Classify lake water quality based on the Midwest Glacial Lakes Partnership thresholds for watershed landcover composition and convert to raster: z 3 = if percent developed + percent ag in the watershed is <= 25 2 = if percent developed + percent ag in the watershed is >25 and <=60 1 = if percent developed + percent ag in the watershed is > 60 4. Using results from above, convert vector to raster to get: a. the whole lake class of contributing watershed condition. 7. Clean up errant pixels caused by non-overlapping LAGOS and NLCD open water using the condition: If the final score is NULL but there is an open water class value, then assign that value to the pixel, otherwise, keep the existing value.ArcGIS ImageMapLayerhttps://hub.arcgis.com/datasets/513703a4ceed4eb5bbf975d0305cb123engU.S. Fish and Wildlife Service Open DataPublicDraft Lakes Indicator - Pelagic Score (Southeast and Midwest Blueprint Indicator) [United States]Web servicesUnited StatesLast Modified: 2025-02-26