+National
+
Hydrography
1
Dataset (NHD) and
NHDPlus High
Resolution
(NHDPlusHR)
Status
AWRA
November 17, 2016
Alan Rea
U.S. Geological Survey
National Geospatial Program
What is the National Hydrography
+
Dataset?
Surface water features found on topographic maps
22
Linear Referencing – Stream
+
addresses
14010002000421
0
50
25
100
75
3
+
4
Complete Hydrologic Information System
Apps
NHD
NHDPlus
3DEP
Layers of data
linked to NHD
NWIS
The future of hydrography is in
a fully integrated hydrologic
information system =
framework + API
Water Quality Portal
Catchment
Characteristics
Other linked Layers
Products & Services
WBD
Apps
Apps
Apps
Apps
Apps
+ National Hydrography Dataset Plus
(NHDPlus)
An integrated suite of geospatial flow volume and velocity
data to support modeling
Incorporates
 Hydrography
 Boundaries
 Elevation
NHD
WBD
Elevation
5
+ Catchments
6
+Catchments
▪ Catchment delineation process developed
out of the New England SPARROW project
(USGS) and the “Agree” aml (University of
Texas)
▪ Creates a hydrologically-conditioned DEM
(HydroDEM) which integrates information
from three datasets
▪ Catchments are generated from this
HydroDEM
▪ Catchments provide linkage between
landscape processes and stream network
7
+▪NHDPlusHR Development
Addresses the need for a
single hydrographic frame
of reference
Link data to one network
and generalize to many
different scales
8
NHD
100K
2000
NHD
24K
Local/State
applications
2007
NHDPlus
100K
Regional/National
applications
2006
NHDPlus
High-Resolution
Local/State
applications AND
scalable
applications
Started 2015
+ NHDPlus Comparison
NHDPlus - Med Res (V2)
NHDPlus - High Res
Number of
catchments
2.7 million (CONUS)
25 million (U.S.) and growing
Elevation Snapshot
National 1 Arc-Second
Seamless DEM
(30 meters)
National 1/3 Arc-Second
Seamless DEM
(10 meters)
NHD Snapshot
Medium Resolution NHD
100K
High Resolution NHD
Local, 24K, & 63K (AK)
WBD Snapshot
Composite 2010-2012
Updated WBD
File format
Shape file & Grids
File GeoDatabase & TIFF
Tile size
HUC-2 (with exceptions)
HUC-4
Flow Estimates
Mean annual, mean
monthly
Mean annual for now
9
+
10
NHDPlus V21 (CONUS)
+
11
NHDPlus High Resolution
+
12
NHDPlus V21
“Medium Resolution”
1:100,000 scale
Maine
32,000 catchments
+
13
NHDPlus HR
“Full Resolution”
1:24,000 scale +
Maine
189,000 catchments
+NHDPlusHR: More Detail
14
+ Region 06 – ALL Flowlines
15
+ Region 06 – 1:24,000
16
+ Region 06 – 1:100,000
17
+ Region 06 – 1:100K NHDPlus
18
+ Region 06 – 1:250,000
19
+ Region 06 – 1:500,000
20
+ Region 06 – 1:1,000,000
21
+ Region 06 – 1:2,000,000
22
+ Region 06 – 1:5,000,000
23
+ HR NHDPlus Workflow - Hydro Updates
USGS &
USGS Partners
24
Results from QC
prompt NHD & WBD Updates
National Hydrography Dataset &
Watershed Boundary Dataset
NHD & WBD
Updates
NHDHR
Production
Database
National
⅓ Arc-Second
Seamless DEM
HUC4
HUC4
NHD
& WBD
HR NHDPlus QC
MARK-UP Tool
HUC4
3DEP
HR NHDPlus Tools
Build/Refresh
Hydrologic
Regions by
SubRegions
(HU4s)
HUC4
HUC4
HR
NHDPlus
BETA
+ HR NHDPlus Workflow - Hydro Updates
USGS &
USGS Partners
25
Results from QC
prompt NHD & WBD Updates
National Hydrography Dataset &
Watershed Boundary Dataset
NHD & WBD
Updates
NHDHR
Production
Database
National
⅓ Arc-Second
Seamless DEM
Updated
HUC4
HUC4
NHD & WBD
HR NHDPlus QC
MARK-UP Tool
Updated
HUC4
3DEP
HR NHDPlus Tools
Build/Refresh
Hydrologic
Regions by
SubRegions
(HU4s)
HUC4
HUC4
HR
NHDPlus
BETA
+ HR NHDPlus Workflow - Updated Source
26
Results from QC
prompt NHD & WBD Updates &
HR NHDPlus Refresh
National Hydrography Dataset &
Watershed Boundary Dataset
NHDHR
Production
Database
National
⅓ Arc-Second
Seamless DEM
Updated
HUC4
HUC4
HR NHDPlus QC
NHD & WBD
Updated
HUC4
3DEP
HR NHDPlus Tools
Build/Refresh
Hydrologic
Regions by
SubRegions
(HU4s)
HUC4
HUC4
HR
NHDPlus
BETA
+ HR NHDPlus Workflow - Refresh
27
Results from QC
prompt NHD & WBD Updates &
HR NHDPlus Refresh
National Hydrography Dataset &
Watershed Boundary Dataset
NHDHR
Production
Database
National
⅓ Arc-Second
Seamless DEM
HR NHDPlus QC
Updated
HUC4
HUC4
NHD & WBD
Updated
HUC4
3DEP
HR NHDPlus Tools
Build/Refresh
Refresh
Hydrologic
Regions by
SubRegions
(HU4s)
HUC4
HUC4
HR
NHDPlus
HUC4
HUC4
HR
NHDPlus
BETA
+ HR NHDPlus Workflow - Roles
USGS &
USGS Partners
#1
Results from QC
prompt NHD & WBD Updates &
HR NHDPlus Refresh
#3
28
Review Team
#2
National Hydrography Dataset &
Watershed Boundary Dataset
NHD & WBD
Updates
NHDHR
Production
Database
National
⅓ Arc-Second
Seamless DEM
Updated
HUC4
HUC4
HR NHDPlus QC
NHD & WBD
Updated
HUC4
3DEP
HR NHDPlus Tools
Build/Refresh
Hydrologic
Regions by
SubRegions
(HU4s)
HUC4
HUC4
HR
NHDPlus
Drivers for Refresh
●
●
NHDPlus quality
Change in Source Content
NHD, WBD, or 3DEP
○ Change Detection
routines
HUC4
HUC4
HR
NHDPlus
BETA
+ Stewardship Roles
29
1. Pre-NHDPlus: Source Data QC
▪ NHD Network Improvement - NHD Update tools
▪
▪
▪
HU4 - Flowline intersections
Looping Networks
Disconnected Networks
2. NHDPlus Beta QC
▪ Initial QC - HU4 GDBs by Region
▪ Later - Mark-up QC
▪
Identify NHD, WBD and NHDPlus edits required prior to Refresh
3. Update Source Data
▪ NHD Edits via NHD Update tools
+ Stewardship Roles
30
1. Pre-NHDPlus: Source Data QC
▪ NHD Network Improvement - NHD Update tools
▪
▪
▪
HU4 - Flowline intersections
Looping Networks
Disconnected Networks
2. NHDPlus Beta QC
▪ Initial QC - HU4 GDBs by Region
▪ Later - Mark-up QC
▪
Identify NHD, WBD and NHDPlus edits required prior to Refresh
3. Update Source Data
▪ NHD Edits via NHD Update tools
+
31
+
32
+HR NHDPlus
Status updates:
http://nhd.usgs.gov/newsletter_list.html
Presentation (with outdated status):
http://nhd.usgs.gov/HydrographySeminarSeries.html
(see Seminar 6)
Questions….
Alan Rea, P.E., Hydrologist
National Hydrography Dataset
National Geospatial Program
U.S. Geological Survey
Boise, Idaho
(208)387-1323 [email protected]
33