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The NHD and the Future of Stream Mapping in West Virginia

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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The NHD and the Future of Stream Mapping in West Virginia

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  1. 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

  2. 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

  3. 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

  4. 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)

  5. 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

  6. The big picture… • Introduction • NHD 24K • NHD local • Stewardship Quantifying issues with the NHD Primarily based on WVDEP review

  7. The big picture… • Introduction • NHD 24K • NHD local • Stewardship Quantifying issues with the NHD Primarily based on WVDEP review

  8. The big picture (2)… • Introduction • NHD 24K • NHD local • Stewardship • Quantifying 24K NHD issues as identified by WVDEP review

  9. 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

  10. 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

  11. 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

  12. 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

  13. 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

  14. 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

  15. Original 24K NHD • Introduction • NHD 24K • NHD local • Stewardship

  16. 2003 Aerial photos • Introduction • NHD 24K • NHD local • Stewardship 2003 Photo

  17. Mining visible in 2003 • Introduction • NHD 24K • NHD local • Stewardship 2003 Photo

  18. Aerial photos 2007 • Introduction • NHD 24K • NHD local • Stewardship 2007 Photo

  19. Mining visible 2007 • Introduction • NHD 24K • NHD local • Stewardship 2007 Photo

  20. Summary for 24K NHD in Coal

  21. Coal case study: Local • Introduction • NHD 24K • NHD local • Stewardship

  22. Coal case study: Local • Introduction • NHD 24K • NHD local • Stewardship

  23. 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

  24. Discussion Natural Resource Analysis Center West Virginia University www.nrac.wvu.edu WV GIS Technical Center West Virginia University wvgis.wvu.edu

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