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Minnesota Hydrography

Minnesota Hydrography. Land of 10,000 Lakes (or so). Presented by:. Mark Olsen Minnesota Pollution Control Agency 520 Lafayette Road N. St. Paul, MN 55155 mark.olsen@pca.state.mn.us. A Matter of Scale. 11,842 Lakes > 10 acres Over 14,000 when including smaller lakes

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Minnesota Hydrography

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  1. Minnesota Hydrography Land of 10,000 Lakes (or so) Presented by: Mark Olsen Minnesota Pollution Control Agency 520 Lafayette Road N. St. Paul, MN 55155 mark.olsen@pca.state.mn.us

  2. A Matter of Scale • 11,842 Lakes > 10 acres • Over 14,000 when including smaller lakes • 92,000 miles of stream/river

  3. Water quality is highest priority concern Environmental Issues Malformed frogs Nitrates in Groundwater Fish kills and consumption advisories Recreational usage Hypoxia Use of local data Access to data and information Growing Public Interest/Concern

  4. Minnesota’s Governor’sCouncil on Geographic Information Hydrography Committee • Inventory and state coordination • Define the MN hydrography framework • Coordination with Federal activities

  5. Inventory and State Coordination • Legacy systems • 25 years of history • Defacto standards • Distributed authority • Relies on voluntary cooperation

  6. Basic elements Definition Delineation Identification Association of events Define MN Framework Basic features • Watershed • Basin • Watercourse • Hydrologic Point of Interest

  7. The Need to Share • Watershed approach • Environmental issues ignore political boundaries • Shared responsibility and authority

  8. St. Croix River Basin:

  9. The Need to Share • Watershed approach • Environmental issues ignore political boundaries • Shared responsibility and authority • Example: Lakefinder • Single point of access for DNR, MPCA, and MDH data

  10. WWW.DNR.STATE.MN.US/LAKEFIND/INDEX.HTML

  11. Dept of Health - Fish Consumption Advisories

  12. MPCA - Water Quality Data

  13. MPCA - Water Clarity Data

  14. DNR - Recreational Use

  15. DNR - Topographic Map

  16. MPCA Activities • Hydrography dataset is framework for integration • Standards “Perch Creek: T.116, 117, 118, R.39” • Monitoring (STORET) • Permitted dischargers • Assessments (305(b), 303(d)) • Funding activities

  17. Reach Indexing Tool Why We Like It: • No cost • Ease of use • Activities associated to real surface water features - not dependent on locational accuracy or scale

  18. St. Croix River Basin - Indexed Stream Standards

  19. Flow validated data needed to populate missing lake reach IDs

  20. Reach Indexed 305(b) Assessment

  21. Higher Resolution Data • DNR “Level 1” Hydro - 24K • DLG with lake shorelines from NWI • MPCA funded USGS to research conversion to NHD • Integration of Wisconsin data • Ready now to add ID’s and names • NHD delineation rules • Technical coordination with USGS

  22. This is the End.

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