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Lake Conditions Assessment - Draft v2 [U.S. Fish and Wildlife Service]

Department of the Interior Full Details

Full Details

Title
Lake Conditions Assessment - Draft v2 [U.S. Fish and Wildlife Service]
Description
This lakes condition assessment is DRAFT based on methods in development with the Southeast Conservation Adaptation Strategy and the Midwest Landscape Initiative. This layer is being made public to gather feedback from stakeholders and should not be used as an authoritative evaluation. The result presented here are based on assigning 1) a pelagic condition using the upstream watershed condition as reported for the LAGOS lakes and 2) a nearshore condition assessment where adjacent riparian landcover (natural or non-natural) is assigned to a 100 m internal buffer from lakeshore into the lake. 1) WQ/Pelagic scoring is based on total upstream percent ag + percent developed in the watershed. 0-5% = 55-15% = 415-43% = 343-80% = 280-100% = 1 2) If the landcover adjacent to the shoreline is natural, the nearshore zone (100m buffer inside the lake), gets an additional point. VGood Pelagic, Good Nearshore 5 + 1 = 6VGood Pelagic, Poor Nearshore5 + 0= 5VGood Pelagic=5Good Pelagic, Good Nearshore4+ 1=5Good Pelagic, Poor Nearshore4+ 0=4Good Pelagic=4Fair Pelagic, Good Nearshore3+ 1= 4Fair Pelagic, Poor Nearshore3+ 0= 3Fair Pelagic=3Poor Pelagic, Good Nearshore2+ 1=3Poor Pelagic, Poor Nearshore2+ 0=2Poor Pelagic=2VPoor Pelagic, Good Nearshore1+ 1=2VPoor Pelagic, Poor Nearshore1+ 0=1VPoor Pelagic=1============================================================Brief Mapping Steps1.NLCD2021 set 11=NULL2.9x9 mode moving window over NLCD (majority in 9x9)3.Assign natural (=1) /non natural (=0) to RAT (barren = non nat); zero everywhere else; set no data to 2404.Use LOCUS lakes and attributes - has better representation across the SE - esp for new reservoirs in TX which are absent in NHD5.Join LOCUS lake with archetypes raw data table6.Select only lakes that have matching archetype data7.Buffer lakes (inner) by -100m.8.Union selected LOCUS lakes and buffers9.Calculate (perag + perdev) => totag_totdev10.Assign pelagic value using modified (5) totag_totdev quantiles11.Convert joined LOCUS lake vector to raster - use pelagic classes as "Value"12.Convert joined LOCUS lake vector to raster - use littoral flag as "Value" (nodata to non lentic cells will exclude riparian and land)13.Combine rasters as: [#12 Littoral (littoral = 1, nonlittoral=0) * #3 moving window (natural=1 vs non-natural=0)] + #11 pelagic (upstream watershed score)14.Fill any gaps with pelagic score==========================================================================
Creator
Department of the Interior
Temporal Coverage
Last modified 2024-06-25
Date Issued
2024-05-22
Access Rights
Public
Format
Imagery
Language
English
Date Added
August 28, 2025

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  • Citation
    Department of the Interior (2024). Lake Conditions Assessment - Draft v2 [U.S. Fish and Wildlife Service]. . https://gis-fws.opendata.arcgis.com/content/fws::lake-conditions-assessment-draft-v2 (imagery)
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