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Layer: Subwatershed Summary Statistics (ID:6)

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Name: Subwatershed Summary Statistics

Display Field: HUC12Name

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Is View: true

Is Updatable View: true

Source Schema Changes Allowed: true

Sources

Description: <div style="text-align:Left;"><p style="margin:0 0 0 0;"></p><p style="margin-top:0in; margin-right:0in; margin-bottom:0in; margin-left:.25in; text-indent:.25in;"><span style="font-family:&quot;Aptos&quot;,sans-serif;">This layer is intended to provide estimates of nonpoint sources on the subwatershed (HUC-12) level. These include estimates of livestock agriculture (such as livestock numbers and manure land-application area), lost wetland, natural riparian buffers, and the amount of land that is covered by impervious surfaces. Each nonpoint source indicator (or stressor) is given a category based on how the subwatershed compares with all other subwatersheds in the entire state (e.g. a subwatershed that is marked as &quot;high&quot; for impervious surfaces would have a high amount of impervious surface relative to the state median value). Land cover (NOAA, 2023), population and housing unit data (US Census Bureau, 2020), agricultural census data (USDA, 2020), EGLE-WRD CAFO permitting program (2025), and lost wetland (Fizzell, 2015) are summarized for each 12-digit HUC level subwatershed in Michigan. </span></p><p style="margin-top:0in; margin-right:0in; margin-bottom:0in; margin-left:.25in; text-indent:.25in;"><span style="font-family:&quot;Aptos&quot;,sans-serif;"><br /></span></p><p style="margin-top:0in; margin-right:0in; margin-bottom:0in; margin-left:.25in; text-indent:.25in;"><span style="font-family:&quot;Aptos&quot;,sans-serif;">The number of hogs and cattle, and the percent of agricultural land that has manure land-applied or tiled, are estimates derived from county-based agricultural census and EGLE-WRD CAFO permitting data. The agricultural census county-level data were then distributed geographically across all agricultural land cover in that county, assuming even distribution or impact of a given stressor. EGLE-WRD CAFO permitting livestock data were evenly distributed across associated CAFO fields. Natural riparian buffer coverage is a percent of stream miles with a 30 meter natural vegetation buffer, and was created by buffering the stream hydrography layer and intersecting the buffer with forested and wetland 2023-era land cover.</span></p></div><div style="text-align:Left;"><br /><table border="0" cellpadding="0" style><tbody><tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>Field Name</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p><b>Description</b></p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>HUC12</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p style="line-height:normal;">Hydrologic Unit Code (HUC) 12 is a subwatershed identifier that is the smallest unit in the US Geological Survey's (USGS) Watershed Boundary Dataset.</p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>HUC12Name</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Name of the subwatershed</p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>PopulationEstimation</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Estimated population in a subwatershed, approximation from 2020 decennial census block data.</p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>PopulationStatewideRank</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Categorical ranking of subwatershed population, indiciating how the subwatershed compares with all other subwatersheds in Michigan. Original data sourced from the 2020 US Census blocks.</p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>HousingUnitsEstimation</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Estimated number of housing units in a subwatershed, approximation from 2020 decennial census block data.</p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>HousingUnitsStatewideRank</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Categorical ranking of the number of housing units in a subwatershed, indicating how the subwatershed compares with all other subwatersheds in Michigan. Original data sourced from the 2020 US Census blocks.</p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>LandCoverPercentDeveloped</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Percentage of total subwatershed land cover that is developed summarized from the 2023 National Land Cover Dataset (NLCD)</p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>LandCoverPercentAgricultural</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Percentage of total subwatershed land cover that is agricultural summarized from the 2023 National Land Cover Dataset (NLCD)</p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>LandCoverPercentWetland</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Percentage of total subwatershed land cover that is wetland summarized from the 2023 National Land Cover Dataset (NLCD)</p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>LandCoverPercentForest</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Percentage of total subwatershed land cover that is forested, summarized from the 2023 National Land Cover Dataset (NLCD)</p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>LandCoverPercentOther</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Percentage of total subwatershed land cover that is in other categories (open water, barren land, shrub/scrub, etc.)<span style>  </span>summarized from the 2023 National Land Cover Dataset (NLCD)</p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>ImperviousSurfaceRank</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Categorical ranking of the proportion of impervious land cover in a subwatershed, indicating how the subwatershed compares with all other subwatersheds in Michigan. Original data sourced from the 2023 C-CAP NOAA Impervious Land Cover dataset.</p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>ImperviousSurfaceAcres</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Measurement (in acres) of impervious land cover in a subwatershed. Original data sourced from the 2023 C-CAP NOAA Impervious Land Cover dataset.</p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>WetlandsLostRank</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Categorical ranking of the proportion of pre-settlement wetlands that have been lost, or developed. This ranking indicates how the subwatershed compares with all other subwatersheds in Michigan. Original data sourced from the 2005 National Wetlands Inventory.</p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>EGLEManureApplicationAreaAcre</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Measurement (in acres) of land area that has (or is eligible) for land applications of manure. Original data sourced from EGLE-WRD Combined Animal Feeding Operations permitting program as of February 25, 2025. </p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>EGLEManureApplicationAreaPer</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Percentage of NLCD 2023 agricultural land that has (or is permitted to have) land applications of manure according to EGLE-WRD CAFO permitting program. Original data sourced from EGLE-WRD Combined Animal Feeding Operations permitting program as of February 25, 2025. Note: This estimate only includes permitted CAFO operations.</p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>EGLEManureApplicationAreaRank</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Categorical ranking of the proportion of NLCD 2023 agricultural land that has (or is permitted to have) land applications of manure. This ranking indicates how the subwatershed compares with all other subwatersheds in Michigan. Original data sourced from the EGLE-WRD Combined Animal Feeding Operations permitting program as of February 25, 2025.</p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>AgCenManureApplicationAreaAcre</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Agricultural Census 2020 County level measurements (in acres) of land area that has had land applications of manure were summarized by subwatersheds assuming even distribution across NLCD 2023 Agricultural Land. </p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>AgricultureAcres</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Agricultural Area (in acres) of a subwatershed according to the 2023 NLCD.</p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>AgCenManureApplicationAreaPer</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Percentage of NLCD 2023 agricultural land that has (or is permitted to have) land applications of manure according the 2020 Agricultural Census.</p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>AgCeManureApplicationAreaRank</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Categorical ranking of the percentage of NLCD 2023 agricultural land that has (or is permitted to have) land applications of manure according the 2020 Agricultural Census. This ranking indicates how the subwatershed compares with all other subwatersheds in Michigan. </p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>TotalRiparianAreaSqMi</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Total Riparian Area within subwatersheds measured using a 30 meter buffer of rivers and streams (extracted from National Hydrography Dataset- High Resolution).</p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>VegetatedRiparianAreaSqMi</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Total Riparian Area within subwatersheds indicating the area of wetland and forested land cover types (2023 NLCD) within 30 meters of rivers and streams (extracted from National Hydrography Dataset- High Resolution).</p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>PercentOfVegetatedBuffer</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Percentage of total riparian area that is vegetated (consisting of wetland and forest land cover types) within a subwatershed. </p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>VegetatedBufferRank</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Categorical ranking of the percentage of riparian areas that are vegetated for a subwatershed. This ranking indicates how the subwatershed compares with all other subwatersheds in Michigan.</p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>HogCount</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Agricultural Census 2020 County level hog counts were summarized by subwatersheds assuming even distribution across NLCD 2023 Agricultural Land.</p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>HogRank</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Categorical ranking of the number of Hogs in a subwatershed according the 2020 Agricultural Census. This ranking indicates how the subwatershed compares with all other subwatersheds in Michigan.</p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>CattleCount</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Agricultural Census 2020 County level Cattle counts were summarized by subwatersheds assuming even distribution across NLCD 2023 Agricultural Land.</p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>CattleRank</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Categorical ranking of the number of Cattle in a subwatershed according the 2020 Agricultural Census. This ranking indicates how the subwatershed compares with all other subwatersheds in Michigan.</p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>TileDrainAcresPercent</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Percentage of total agricultural land in a subwatershed that is tile-drained, assuming even distribution of tile drained acres from Agricultural Census 2020 County level data across agricultural land.</p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>TileDrainAcres</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Agricultural Census 2020 County level tile drain acres were summarized by subwatersheds assuming even distribution across NLCD 2023 Agricultural Land.</p> </td> </tr> <tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>TileDrainRank</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Categorical ranking of the amount of agricultural land that is tile drained. This ranking indicates how the subwatershed compares with all other subwatersheds in Michigan.</p> </td> </tr><tr style="height:15.0pt;"> <td style="width:188.35pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="251"> <p><b>SepticSystemsEstimateAndRank</b></p> </td> <td style="width:246.0pt; border:solid #A5A5A5 1.0pt; padding:.75pt .75pt .75pt .75pt; height:15.0pt;" width="328"> <p>Estimated number of septic systems and statewide ranking indicating how the subwatershed compares with all other subwatersheds in Michigan.</p> </td> </tr></tbody></table><br /></div>

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Last Edit Date: 4/3/2026 3:17:39 PM

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