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:"Aptos",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 "high" 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:"Aptos",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:"Aptos",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>
PercentOfVegetatedBuffer (type: esriFieldTypeSingle, alias: Percent of Riparian Area that is Vegetated, SQL Type: sqlTypeOther, nullable: true, editable: true)
VegetatedBufferRank (type: esriFieldTypeString, alias: Percent of Riparian Area that is Vegetated Statewide Rank, SQL Type: sqlTypeOther, length: 255, nullable: true, editable: true)
TileDrainAcres (type: esriFieldTypeInteger, alias: Estimate of Tile Drained Agricultural Area (Acres), SQL Type: sqlTypeOther, nullable: true, editable: true)
TileDrainAcresPercent (type: esriFieldTypeDouble, alias: Percentage of Agricultural Area that is Tile Drained , SQL Type: sqlTypeOther, nullable: true, editable: true)
TileDrainRank (type: esriFieldTypeString, alias: Percentage of Agricultural Area that is Tile Drained Statewide Ranking, SQL Type: sqlTypeOther, length: 255, nullable: true, editable: true)
ManureApplicationAreaAcres (type: esriFieldTypeInteger, alias: Estimate of Agricultural Area Fertilized with Manure (Acres), SQL Type: sqlTypeOther, nullable: true, editable: true)
ManureApplicationAreaPercent (type: esriFieldTypeSingle, alias: Percentage of Agricultural Area that is Fertilized with Manure, SQL Type: sqlTypeOther, nullable: true, editable: true)
ManureApplicationAreaRank (type: esriFieldTypeString, alias: Percentage of Agricultural Area that is Fertilized with Manure Statewide Ranking, SQL Type: sqlTypeOther, length: 255, nullable: true, editable: true)