Layers:

Layer: Hydrologic Alteration Features (0)

Sub Layers:
• Canals
• Channelized Streams
• Industrial/Agricultural Reservoirs
• LA_MS_combined_dams_web_mercator
Name: Hydrologic Alteration Features

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Spatial Reference: 102100  (3857)



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Layer: Canals (1)

Name: Canals

Display Field: GNIS_Name

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Description: This layer contains canals derived from the National Hydrologic Dataset (NHD). <a href='xml/NHDFlowline.shp.xml' target='_blank'><b>Metadata</b><a></br> <br> <img src="img/Canals_thumb.png"> <a href='img/Canals.jpg' target='_blank'><b>View larger image</b><a>

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Spatial Reference: 102100  (3857)



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Layer: Channelized Streams (2)

Name: Channelized Streams

Display Field: GNIS_Name

Type: Feature Layer

Geometry Type: esriGeometryPolyline

Description: Data set depicting channelized streams within Louisiana's watersheds. To see how this dataset was created, check out the <a href='methods/Channelization_methods.pdf' target='_blank'><b>Methods</b><a> <font color ="black">section.</font></br> </br> <a href='xml/NHDFlowline.shp.xml' target='_blank'><b>Metadata</b><a></br> <br> <img src="img/Channelization_thumb.png"> <a href='img/Channelization.jpg' target='_blank'><b>View larger image</b><a>

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Spatial Reference: 102100  (3857)



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Layer: Industrial/Agricultural Reservoirs (3)

Name: Industrial/Agricultural Reservoirs

Display Field: GNIS_Name

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: This layer contains industrial and agricultural reservoirs or 'non-dam reservoirs'. These reservoirs features are derived from the National Hydrologic Dataset (NHD). To see how these features were identified, go to the <a href='methods/reservoir_methods.pdf' target='_blank'><b>Methods</b><a> <font color ="black">section.</font></br> </br> <a href='xml/NHDWaterbody.shp.xml' target='_blank'><b>Metadata</b><a></br> <br> <img src="img/reservoirs_thumb.png"> <a href='img/reservoirs.jpg' target='_blank'><b>View larger image</b><a>

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Spatial Reference: 102100  (3857)



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Layer: LA_MS_combined_dams_web_mercator (4)

Name: LA_MS_combined_dams_web_mercator

Display Field: Dam_Name

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Layer: HUC8 Alteration Assessments (5)

Sub Layers:
• HUC 8 Dam Density
• HUC 8 Dam Storage
• HUC 8 Channelization
• HUC 8 Canal Intensity
• HUC 8 Industrial/Agricultural Reservoir Index
Name: HUC8 Alteration Assessments

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Spatial Reference: 102100  (3857)



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Layer: HUC 8 Dam Density (6)

Parent Layer: HUC8 Alteration Assessments

Name: HUC 8 Dam Density

Display Field: SUBBASIN

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Description: This layer is comprised of U.S.G.S. sub-basins categorized based on the density of dams within the sub-basin (dams/mile²) into 'Low', 'Medium-Low', 'Medium-High', and 'High' categories. For more information about how dam density was calculated, see our <a href='methods/Dam_Density_methods.pdf' target='_blank'><b>Methods</b><a> <font color ="black"> page. </font> <img src="img/Dam_Density_thumb.png"> <a href='img/Dam_Density.jpg' target='_blank'><b>View larger image</b><a>

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Spatial Reference: 102100  (3857)



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• ResX100 ( type: esriFieldTypeSingle, alias: Reservoir % (area x 100) )
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Layer: HUC 8 Dam Storage (7)

Parent Layer: HUC8 Alteration Assessments

Name: HUC 8 Dam Storage

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Description: This layer is comprised of U.S.G.S. sub-basins categorized based on the water storage capacity of dams within the sub-basin (normalized for watershed area) into 'Low', 'Medium-Low', 'Medium-High', and 'High' categories. For more information about how dam storage was calculated, see our <a href='methods/Dam_Storage_methods.pdf' target='_blank'><b>Methods</b><a><font color ="black"> page. </font></br> <br> <img src="img/Dam_storage_thumb.png"> <a href='img/Dam_storage.jpg' target='_blank'><b>View larger image</b><a>

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Spatial Reference: 102100  (3857)



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Layer: U.S. Congressional Districts Dam Density (29)

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Layer: U.S. Congressional Districts Canal Intensity (32)

Parent Layer: U.S. Congressional District Assessments

Name: U.S. Congressional Districts Canal Intensity

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Description: This layer is comprised of Congressional Districts categorized based on the intesity of canals within each district (a ratio of total canal length to total stream length) into 'Low', 'Medium', and 'High' categories. For more information about how canal intensity was calculated, see our <a href='methods/Canal_Intensity_methods.pdf' target='_blank'><b>Methods</b><a><font color ="black"> page. </font></br> <br> <img src="img/Canals_thumb.png"> <a href='img/Canals.jpg' target='_blank'><b>View larger image</b><a>

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Layer: U.S. Congressional Districts Industrial/Agricultural Reservoir Index (33)

Parent Layer: U.S. Congressional District Assessments

Name: U.S. Congressional Districts Industrial/Agricultural Reservoir Index

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Description: This layer is comprised of Congressional Districts categorized based on the total area of reservoirs normalized by district area into 'Low', 'Medium', and 'High' categories. For more information about how reservoir index was calculated, see our <a href='methods/reservoir_Index_methods.pdf' target='_blank'><b>Methods</b><a><font color ="black"> page. </font></br> <br> <img src="img/reservoirs_thumb.png"> <a href='img/reservoirs.jpg' target='_blank'><b>View larger image</b><a>

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