1 the national hydrography dataset plus what is nhdplus?
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The National Hydrography The National Hydrography Dataset Dataset PlusPlus
What is NHDPlus?What is NHDPlus?
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How will this vision be attained?
Vision for aVision for aNational Geospatial Surface Water National Geospatial Surface Water
FrameworkFramework
National Elevation Dataset (NED)
National Hydrography
Dataset (NHD)
Watershed Boundary Dataset (WBD)
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The TeamThe Team
EPA Project LeadTommy Dewald
Horizon Systems
Cindy McKay
Jen Hill
Bob Deffenbaugh
USGS WRD
Al Rea
Rich Moore
Craig Johnston
Modeling Consultant
Tim Bondelid
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NHD PlusNHD PlusAn integrated suite of application-ready An integrated suite of application-ready geospatial surface water data products. geospatial surface water data products.
It’s the first national effort to integrate:It’s the first national effort to integrate:
National Hydrography Dataset (NHD)National Hydrography Dataset (NHD) National Elevation Dataset (NED)National Elevation Dataset (NED) National Watershed Boundary Dataset (WBD) National Watershed Boundary Dataset (WBD) National Land Cover Dataset (NLCD)National Land Cover Dataset (NLCD)
NHDPlus links the mapped stream network
to the landscape.
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NHD Plus – What’s Inside?NHD Plus – What’s Inside?NHDNHD Greatly improved 1:100K National Hydrography DatasetGreatly improved 1:100K National Hydrography Dataset
PLUS (9 more components):PLUS (9 more components): Value Added AttributesValue Added Attributes Elevation-based CatchmentsElevation-based Catchments Catchment CharacteristicsCatchment Characteristics Headwater Node AreasHeadwater Node Areas Cumulative Drainage Area CharacteristicsCumulative Drainage Area Characteristics Flow Direction, Flow Accumulation, and Elevation GridsFlow Direction, Flow Accumulation, and Elevation Grids Min/Max Elevations and SlopesMin/Max Elevations and Slopes Flow Volume & Velocity EstimatesFlow Volume & Velocity Estimates Flow Gages with Network LocationsFlow Gages with Network Locations
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A Framework dataset that includes:A Framework dataset that includes:
• Hydrographic features for making mapsHydrographic features for making maps• A national stream addressing systemA national stream addressing system• A modeling network for navigating A modeling network for navigating
upstream/downstreamupstream/downstream• A maintenance infrastructureA maintenance infrastructure• User updatesUser updates• Distributed formats – personal geodatabase, Distributed formats – personal geodatabase,
shapefiles, coveragesshapefiles, coverages• Compatible with ArcHydro Model & ToolsCompatible with ArcHydro Model & Tools
What is theWhat is the National Hydrography Dataset (NHD)? National Hydrography Dataset (NHD)?
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Impairm
ent
DrinkingWaterIntake
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Value-Added AttributesValue-Added Attributes
A set of two dozen network A set of two dozen network characteristicscharacteristics
Derived from native NHD contentDerived from native NHD content For Analysis, Navigation & DisplayFor Analysis, Navigation & Display
(Stream Order, Stream Level, Waterbody-Network link and more…)
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Elevation Grid (elev_cm)Elevation Grid (elev_cm)National Elevation Data (NED) used to create the NHDPlusNational Elevation Data (NED) used to create the NHDPlus
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Hydrologically-Conditioned ElevationHydrologically-Conditioned Elevation
NationalHydrographyDataset (NHD)
Watershed BoundaryDataset (WBD)
National ElevationDataset (NED)
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Flow Direction Grid (FDR)Flow Direction Grid (FDR)
Cells point down hill Cells point down hill to the neighboring cellto the neighboring cellwith the lowest elevationwith the lowest elevation
Flow Accumulation Grid (FAC)Flow Accumulation Grid (FAC)
Cells contains the count Cells contains the count of the number of cells that of the number of cells that are uphillare uphill
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Catchment Grid & ShapefileCatchment Grid & ShapefileThe portion of the land surface that drains to a network flowlineThe portion of the land surface that drains to a network flowline
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Catchment AttributesCatchment Attributes
Mean Annual Temperature (Prism - 4km)
Mean Annual Precipitation (Prism - 4km)
% of each of the 21 land use classifications from the 1992 National Land Cover Dataset (NLCD)
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Flowline AttributesFlowline Attributes
Raw min/max elevationsRaw min/max elevations Smoothed min/max elevationsSmoothed min/max elevations SlopeSlope Cumulative drainage areaCumulative drainage area Cumulative land use classificationsCumulative land use classifications Flow volume, incremental inflow – Unit Flow volume, incremental inflow – Unit
Runoff MethodRunoff Method Flow volume – Vogel MethodFlow volume – Vogel Method Velocity – JobsenVelocity – Jobsen
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USGS Gage Point Events on USGS Gage Point Events on NHDPlus – Coming Soon!NHDPlus – Coming Soon!
Many Attributes:Gage IDReachcode/MeasureLat/LongAgencyStation NameSeveral Dozen Flow StatsAnd more…
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62 units total
Distribution Units for Elevation, Distribution Units for Elevation, FAC, and FDR GridsFAC, and FDR Grids
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141312 1817090301 02 04
10
05
06
0711
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NHDPlus Distribution Units for NHD, Catchments, NHDPlus Distribution Units for NHD, Catchments, and Attribute Tablesand Attribute Tables
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171710U10U
0505
0606
0707
11110808
1515
1414
0303
0202
0101
04041616
1212
1313
0909
031803182020
2020
0318
10L10L
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Linking Data to the NHDPlusLinking Data to the NHDPlus
Area Links
Waterbody Reach: 06030102002785 + shape
Linear Links
Linear Reach: 05030204004722From Measure: 15.0
To Measure: 90.00
Linear Reach: 02020005000375Measure: 48.247Po
int L
inks
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Things Linked to NHDPlusThings Linked to NHDPlus EPA Water ProgramsEPA Water Programs
• Water Quality StandardsWater Quality Standards• Water Quality Monitoring StationsWater Quality Monitoring Stations• Assessed WatersAssessed Waters• Impaired Waters Impaired Waters • Nonpoint Source ProjectsNonpoint Source Projects• BeachesBeaches• Fish Consumption AdvisoriesFish Consumption Advisories• Sewage No Discharge ZonesSewage No Discharge Zones• Permitted DischargersPermitted Dischargers• Drinking Water IntakesDrinking Water Intakes• Drinking Water WellsDrinking Water Wells• Clean Watershed NeedsClean Watershed Needs• Special Appropriations ProjectsSpecial Appropriations Projects• And More…And More…
USGS Flow GagesUSGS Flow Gages
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2020
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A Quick Example of Analysis A Quick Example of Analysis Using NHDPlusUsing NHDPlus
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STEP 1
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STEP 2
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STEP 3
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STEP 4
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STEP 5
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STEP 6
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STEP 7
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Value Value Added Added
AttributesAttributes
TemperatureTemperature&&
PrecipitationPrecipitation
Land Land UseUse
Flow Flow Volume Volume
& & VelocityVelocity
STEP 8
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Watershed CharacterizationWatershed Characterization
Main Stem: Huntsville Spring BranchStream Order: 3Stream Level: 4
Area weighted precipitation 1431.2 mmArea weighted temperature 15.3 oC
Land UseOpen Water 1%Residential 28%Commercial/Ind/Trans 9%Barren 1%Forest 33%Pasture/Hay 5%Row Crops 12%Urban/Rec Grasses 5%Wetlands 5%Other 1%
Drainage area 180.5 km2
Mean Annual Flow (UROM) 128.6 cfsMean Annual Flow (Vogel) 123.7 cfs
Mean Annual Velocity (UROM) 0.95 fpsMean Annual Velocity (Vogel) 0.87 fps
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Importance of the NHDPlusImportance of the NHDPlus
The NHDPlus Is a Complete Analytical The NHDPlus Is a Complete Analytical ToolTool Very Robust Stream NetworkVery Robust Stream Network New Attributes for Improved ApplicationsNew Attributes for Improved Applications
Catchments, FDR, FAC and Elevation Add Catchments, FDR, FAC and Elevation Add the Landscape into the Analytic the Landscape into the Analytic EnvironmentEnvironment Watershed Delineation and CharacterizationWatershed Delineation and Characterization Integration with virtually any landscape Integration with virtually any landscape
datasetdataset Models!!!!Models!!!!
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NHDPlus – What’s Available?NHDPlus – What’s Available? Data: Data:
Great Lakes (04)Great Lakes (04) Mississippi (05, 06, 07, 08, 10, 11 and 0318)Mississippi (05, 06, 07, 08, 10, 11 and 0318) Texas (12)Texas (12) Rio Grande (13)Rio Grande (13) Colorado (14 and 15)Colorado (14 and 15) Great Basin (16)Great Basin (16) Pacific Northwest (17)Pacific Northwest (17) California (18)California (18) New England (01)New England (01) Mid-Atlantic (02)Mid-Atlantic (02) By End of September – South Atlantic (03), Souris-Red-Rainy (09)By End of September – South Atlantic (03), Souris-Red-Rainy (09)
Documentation:Documentation: User GuideUser Guide Various PresentationsVarious Presentations MetadataMetadata Release Notes for each hydro regionRelease Notes for each hydro region
Training:Training: Eight Exercises/TutorialsEight Exercises/Tutorials
Tools:Tools: NHD Flow Table NavigatorNHD Flow Table Navigator NHDPlus VAA NavigatorNHDPlus VAA Navigator
#0 – Preparation#0 – Preparation#1 – Setting Up The Data#1 – Setting Up The Data#2 – Linking Data to NHD#2 – Linking Data to NHD#3 – Navigating with Geometry#3 – Navigating with Geometry#4 – Navigating with VAAs & Flow Table#4 – Navigating with VAAs & Flow Table#5 – Network Analysis#5 – Network Analysis#6 – Raster Dataset#6 – Raster Dataset#7 – Watershed Delineation#7 – Watershed Delineation#8 – Simple Model#8 – Simple Model
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Where to get NHDPlus Data, Where to get NHDPlus Data, Documentation, Presentations, Documentation, Presentations,
Exercises and ToolsExercises and Tools
Web Site: http://www.epa.gov/waters Click on “NHDPlus”
Web Site: http://www.horizon-systems.com/nhdplus
FTP Site: ftp://ftp.horizon-systems.com/nhdplus
Fall 2006: In the EPA Waters Database
Email: [email protected]