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Impact of GNIS on NHD. By: Katy Hattenhauer ADEQ GIS Manager & AR State NHD Steward October 6, 2010. History of NHD. NHD is standard hydrography coverage for the nation NHD also features flow-direction capability Study cause-and-effect relationships

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Impact of gnis on nhd l.jpg

Impact of GNIS on NHD

By: Katy Hattenhauer

ADEQ GIS Manager & AR State NHD Steward

October 6, 2010


History of nhd l.jpg
History of NHD

  • NHD is standard hydrography coverage for the nation

  • NHD also features flow-direction capability

  • Study cause-and-effect relationships

  • Many other capabilities such as flow navigation in disasters

  • Therefore, ideally suited for The National Map

  • USGS NHD Stewardship program for States

  • Designed to help with maintenance of NHD

  • Signed MOU 10/15/08


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History of NHD in AR

  • Border states – how to fix problem areas

  • Policy making, policy changing decisions

  • AGIO webpage for meeting notes and status map


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Our Goal for Arkansas

  • Make state recommendations on strategy moving forward


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Organization of agencies

  • Most of our state agencies have their own water division to handle NHD-type issues

  • APCEC

  • AR GIS Board


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Water Issues in the State

  • A myriad of issues, mostly environmental concerns

  • Flow networks

  • GNIS Names



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NHD, TOPO, and GNIS

  • 43 segments needing to be fixed

  • 277 potential name changes due to the GNIS name and Stream name being different

  • 713 total unnamed streams in GNIS, but we do have a NHD stream name for them



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Ditches

  • Cross County, Arkansas

  • 1, 126 ditches

  • Not including some artificial paths which appear to be ditches

  • Some of these have a GNIS name of a creek (e.g., Twomile Creek)

  • The others do not have a GNIS name

  • Most are farm field runoff ditches


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Ditches

  • Discovered the naming issue when editing Reg 2 and 303d list

  • How do we name these?

  • State agencies are implementing their own naming system for ditches


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Latest Example

Gold Creek

Faulkner County, Arkansas

Site Assessment



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Derogatory Name

  • Should we change this ourselves as part of the NHD program?

  • Should we just leave it alone?

  • Even though we’ve had some complaints from the public, if the townspeople aren’t complaining, should we bother at all?

  • Whose call is it to make?


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Summary/Solutions

  • NHD GeoEdit Tool

  • Any suggestions are greatly appreciated for ditches!!

  • Submit forms for derogatory names


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THANK YOU!!!

Katy Hattenhauer

[email protected]

501-682-0945


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