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

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 NHDH –5,221 dams in MO DNR file; 372 in Subbasin –Dams aid in distinction between “lake/pond” and “reservoir”

Revising High Resolution NHD NHD based on 1:24,000 topographic map products –1950s-1970s ft orthoimagery

Creating Local Resolution NHD 1:2,400 & 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 States StateAgencyMOA?Notes IowaDept. Natural Resources Create 4,800 local;1 meter LiDAR DEMs IllinoisUSGS IL Water Science Center Yes KentuckyGeographic Info Office TennesseeO. Info Resources - GIS Services Create 4,800 & 1,200 local ArkansasDept. Environmental Q. DraftRevise 24k “Awaiting Adoption” OklahomaWater Resources Board Yes KansasDASCYesSome 24k revision NebraskaGIS Steering Committee & DNR YesDNR 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