Post on 31-Dec-2015
description
Minnesota Hydrography
Land of 10,000 Lakes(or so)
Mark OlsenMinnesota Pollution Control
Agency520 Lafayette Road N.St. Paul, MN 55155
mark.olsen@pca.state.mn.us
Presented by:
A Matter of Scale
• 11,842 Lakes > 10 acres
• Over 14,000 when including smaller lakes
• 92,000 miles of stream/river
Growing Public Interest/Concern
• 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
Minnesota’s Governor’s Council on Geographic Information
Hydrography Committee
• Inventory and state coordination
• Define the MN hydrography framework
• Coordination with Federal activities
Inventory and State Coordination
• Legacy systems– 25 years of history– Defacto standards
• Distributed authority – Relies on voluntary cooperation
Define MN FrameworkBasic features
• Watershed
• Basin
• Watercourse
• Hydrologic Point of Interest
Basic elements• Definition
• Delineation
• Identification
• Association of events
The Need to Share
• Watershed approach– Environmental issues ignore political
boundaries
• Shared responsibility and authority
St. Croix River Basin:
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
WWW.DNR.STATE.MN.US/LAKEFIND/INDEX.HTML
Dept of Health - Fish Consumption Advisories
MPCA - Water Quality Data
MPCA - Water Clarity Data
DNR - Recreational Use
DNR - Topographic Map
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
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
St. Croix River Basin - Indexed Stream Standards
Flow validated data needed to populate missing lake reach IDs
Flow validated data needed to populate missing lake reach IDs
Minnesota Aquatic Life Use SupportMinnesota Aquatic Life Use Support
Basins
Use SupportFully SupportingPartially SupportingNot Supporting
Reach Indexed
305(b) Assessment
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
This is the End.