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Evaluating the National Hydrography Dataset and Stewardship Options for
Missouri
National Hydrography
Dataset
• Nation-wide spatial dataset for water and water-related features in the United States.
• Origins– USGS DLGs– EPA Reach files
Utility Network Trace of Subbasin 10300102
NHD Data Model
National Hydrography Dataset• Developments
– Resolutions•Medium Resolution NHD = 1:100,000•High Resolution NHD = 1:24,000•Local Resolution NHD = anything more
local than 1:24,000 (e.g., 12,000; 2,400; 1,200)
– Water Boundary Dataset• Uses:
– Model flow; geocode– MORAP’s Aquatic Gap – Cartography; GRC’s NMSZ project
NHD Stewardship• Partnerships; formal through MOA• USGS
– Infrastructure: initial training, software, documentation, quality control, serve data
• Stewards (usually at the state level)– Support, develop, and coordinate the use
and improvement of NHD for their area– Conduit between USGS & Stewards
•Ensure submitted data is accurate, consistent, and current
• Without Stewardship, Missouri and users of Missouri data fall behind.– 66 subbasins, only 25 contained in Missouri
Editing the NHD
• Importance of tables and metadata
Tools of the Trade• Requires special tools• Help automate process• Maintain
– accuracy of database
– consistency across the U.S.
• USGS training
Documentation
Editing Process
Stewardship Options for Missouri
• Participation• Action
– Requests for corrections or improvements from users
– Gradual improvements– Revision of existing NHD resolutions– Creating new local resolution NHD
Gradual Improvement• Filling out the data
model• Existing data
sources– Wells– Springs– Water intake/outflow– Dams
• New data– Levees– Bridges
• GNIS names
• Dams– USGS adding >2,400
acre feet capacity dams
– 4 such dams in Subbasin 10300102 NHDH
– 5,221 dams in MO DNR file; 372 in Subbasin 10300102
– Dams aid in distinction between “lake/pond” and “reservoir”
Revising High
Resolution NHD
• NHD based on 1:24,000 topographic map products– 1950s-1970s
• 2007 2-ft orthoimagery
Creating Local Resolution NHD1:2,400 & 1:1,200
Time Projections for Editing
Time Estimates for Quality
Control and Data
Submission
• Hard to project• Checking & re-
checking• Repeating circuits
NHD & Stewardship in Neighboring StatesState Agency MOA? Notes
Iowa Dept. Natural Resources
Create 4,800 local;1 meter LiDAR DEMs
Illinois USGS IL Water Science Center
Yes
Kentucky Geographic Info Office
Tennessee O. Info Resources - GIS Services
Create 4,800 & 1,200 local
Arkansas Dept. Environmental Q.
Draft Revise 24k“Awaiting Adoption”
Oklahoma Water Resources Board
Yes
Kansas DASC Yes Some 24k revision
Nebraska GIS Steering Committee & DNR
Yes DNR maintain 24k
Organizing NHD Work• Steward does all the
editing work• Steward’s agency
does all of the editing work
• Other state agencies contribute editing work
• Other government entities contribute editing work
• Other entities contribute editing work
• Steward responsibilities– Contact between the
USGS & work done in the state
– Organizing & coordinating editing work within the state
– Provide instruction and support for editing work done within state
– Check and submit NHD edits done in state to the USGS
Stewardship Options for Missouri• Should Missouri:
– Work towards using the NHD as the primary water-related dataset?
– Participate in the NHD Stewardship Program?
– Work to improve the NHD?
• How will Missouri structure Stewardship?
• Options for improving the NHD– “Stewardship
service”– Gradual
improvement• Existing data
sources– Dams, wells
• New data sources– Levees, bridges
• GNIS names– Revising 100k or 24k– Creating local
resolution NHD
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