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The NHD and the Future of Stream Mapping in West Virginia. Evan Fedorko West Virginia GIS Technical Center www.wvgis.wvu.edu. Jackie Strager (NRAC) www.nrac.wvu.edu Kevin Kuhn Kurt Donaldson WVGISTC. Introduction. Introduction NHD 24K NHD local Stewardship. Outline:

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slide1

The NHD and the Future of

Stream Mapping in West Virginia

Evan Fedorko

West Virginia GIS Technical Center

www.wvgis.wvu.edu

Jackie Strager (NRAC)

www.nrac.wvu.edu

Kevin Kuhn

Kurt Donaldson

WVGISTC

introduction
Introduction
  • Introduction
  • NHD 24K
  • NHD local
  • Stewardship
  • Outline:
    • Existing stream map: 24K NHD
      • Issues with 24K NHD
    • Current stream mapping: Local NHD
      • Pilot projects, results and future plans
    • What’s next: Stewardship and the future of NHD
      • NHD successes and challenges
        • Case study: Stream modifications in the Coal River
      • Future of NHD
nhd status in wv
NHD Status in WV
  • Introduction
  • NHD 24K
  • NHD local
  • Stewardship
  • National Hydrography Dataset (NHD)
  • NHD is complete in WV for:
    • Medium resolution (1:100,000 scale)
    • High resolution (1:24,000)
  • Local resolution NHD (1:4,800)
    • Pilot projects complete
    • Gauley
    • Upper Guyandotte
evaluating the nhd
Evaluating the NHD
  • Introduction
  • NHD 24K
  • NHD local
  • Stewardship
  • What could be improved in 24K NHD in WV?
  • How was this determined?
    • Track known issues (NRAC)
    • Stream naming/coding process (NRAC/WVDEP)
    • Systematic statewide review by WVDEP
    • Case study: mining impacts in the Coal River watershed (stewardship section)
issues with 24k nhd
Issues with 24K NHD
  • Introduction
  • NHD 24K
  • NHD local
  • Stewardship
  • Main Issues:
    • Errors in geometry
    • Errors in attributes
    • Errors in NHD formatting, reach coding
    • Changes in stream geometry since streams were mapped
  • Source data for 24K NHD:
    • 24K DLG data
    • Topo map blue lines
    • GNIS names
the big picture
The big picture…
  • Introduction
  • NHD 24K
  • NHD local
  • Stewardship

Quantifying issues

with the NHD

Primarily based on WVDEP review

the big picture1
The big picture…
  • Introduction
  • NHD 24K
  • NHD local
  • Stewardship

Quantifying issues

with the NHD

Primarily based on WVDEP review

the big picture 2
The big picture (2)…
  • Introduction
  • NHD 24K
  • NHD local
  • Stewardship
  • Quantifying 24K NHD issues as identified by WVDEP review
local resolution nhd
Local resolution NHD
  • Introduction
  • NHD 24K
  • NHD local
  • Stewardship
  • Local streams mapped from 2003 SAMB aerial photography and 3m DEM
  • Benefits:
    • Better cartographic base for local mapping
    • Captures changes in stream geometry, length
  • Status:
    • Pilot projects complete for Gauley, Upper Guyandotte watersheds in late 2008
    • Not currently downloadable from USGS
lr nhd conclusions
LR-NHD Conclusions
  • Introduction
  • NHD 24K
  • NHD local
  • Stewardship
  • Two pilot watersheds completed – not available for download yet
  • WV is the first state to complete conflation using USGS’ new (beta) conflation tools
  • At this time, continued development of LR NHD is NOT recommended. Summary of reasons:
    • Issues with 1:4,800 scale source data – inconsistent collection and inclusion of “special features” such as ditches and culverts
    • Comparative difficulty of conflation process
    • Propagation of HR-NHD errors
    • General lack of interest by the WV NHD community
    • The persistent generalization question
    • Continued changes in stream geometry
future of nhd for wv
Future of NHD for WV…
  • Introduction
  • NHD 24K
  • NHD local
  • Stewardship
  • Goal: Establish a stewardship program for NHD in WV
    • Data updates
    • Ensures data maintenance
    • Central point of contact
  • Steps taken:
    • Drafted a business plan for NHD in WV
    • Drafted an MOU between potential NHD steward and the USGS
    • Working with potential NHD steward
stewardship status
Stewardship Status
  • Introduction
  • NHD 24K
  • NHD local
  • Stewardship
  • Successes
    • Completed business plan for NHD
    • Stakeholders have been engaged in an active discussion
    • Survey conducted in 2008 revealed a great deal of interest in establishing a stewardship program
stewardship status1
Stewardship Status
  • Introduction
  • NHD 24K
  • NHD local
  • Stewardship
  • Challenges
    • Data policy issues within potential stewardship agency
    • Community concerns over what scale of data will be maintained – fear that preferred scale will be “left behind”
    • Front loading of needed edits to HR-NHD resulting in initial…
    • Challenge of funding and personnel commitment to NHD stewardship
coal river case study
Coal River case study
  • Introduction
  • NHD 24K
  • NHD local
  • Stewardship
  • Goal: Quantify amount of stream drainage change related to mining for southern WV watershed
  • Input datasets:
    • 24K NHD stream lines
    • 1:4,800 local stream lines
    • 2003 SAMB aerial photos
    • 2007 NAIP aerial photos
original 24k nhd
Original 24K NHD
  • Introduction
  • NHD 24K
  • NHD local
  • Stewardship
2003 aerial photos
2003 Aerial photos
  • Introduction
  • NHD 24K
  • NHD local
  • Stewardship

2003

Photo

mining visible in 2003
Mining visible in 2003
  • Introduction
  • NHD 24K
  • NHD local
  • Stewardship

2003

Photo

aerial photos 2007
Aerial photos 2007
  • Introduction
  • NHD 24K
  • NHD local
  • Stewardship

2007

Photo

mining visible 2007
Mining visible 2007
  • Introduction
  • NHD 24K
  • NHD local
  • Stewardship

2007

Photo

coal case study local
Coal case study: Local
  • Introduction
  • NHD 24K
  • NHD local
  • Stewardship
coal case study local1
Coal case study: Local
  • Introduction
  • NHD 24K
  • NHD local
  • Stewardship
stewardship
Stewardship

West Virginia’s next steps

Identify principal steward(s)

Consolidate key stakeholders and come to consensus on key issues

Implement stewardship plan

Compile errors and begin editing

  • Introduction
  • NHD 24K
  • NHD local
  • Stewardship
discussion
Discussion

Natural Resource Analysis Center

West Virginia University

www.nrac.wvu.edu

WV GIS Technical Center

West Virginia University

wvgis.wvu.edu