U.S. Department of the Interior U.S. Geological Survey€¦ · Setting: inflow/outflow Year Date...
Transcript of U.S. Department of the Interior U.S. Geological Survey€¦ · Setting: inflow/outflow Year Date...
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U.S. Department of the Interior
U.S. Geological Survey
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U.S. Department of the Interior
U.S. Geological Survey
Water Quality Monitoring at Long
Lake National Wildlife Refuge,
North Dakota: 2008–2012
USGS, Northern Prairie Wildlife
Research Center
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Available online from the Available online from the USGSUSGS publications warehouse:publications warehouse:
httphttp://pubs.usgs.gov/sir/2013/5183/://pubs.usgs.gov/sir/2013/5183/
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Partners
USFWS, LLNWR staff
ND Dept. of Health, Mike Ell
USGS Northern Prairie Wildlife Research Center, Ray Finocchiaro, Charlie Dahl, Brian Tangen, Robert Gleason
USGS ND Water Science Center, Steve Robinson, Bill Damschen
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Background
Biologic assessment / CCP
Potential water-quality issues
Evaporates and chemicals
Impact to plants, aquatic invertebrates, and birds
Research, inventory, and monitoring
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Monitoring program
USGS, USFWS, NDDH
Initiated in 2008
Goals:
Protocol
Baseline data
Identify potential
water quality issues
Support management
decisions
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Water quality data
Bi-monthly samples
Hand-held
Water samples
Major ions
Nutrients
Elements
SC / pH
Automated loggers
Specific conductance
Water level
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Sample locations
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Setting:
precipitation/temp Precipitation
Air Temperature
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Setting: inflow/outflow
Year Date range n Inflow, cfs Outflow, cfs Difference, cfs
2008 June 19—Oct. 17 107 8.48 0.00 -8.48
2009 June 18—Nov. 18 154 110.37 28.55 -81.82
2010 April 23—Nov. 19 211 59.91 94.42 34.51
2011 May 11—Oct. 26 169 143.72 193.63 49.91
2012 April 4—Nov. 13 223 18.53 31.18 12.66
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2009 2008 2007 2006 2005
Long Lake NWR, 2005–2009
Photos provided by USFWS: ~August-September
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Sampling Season
Date
Year Start End Number of sites Sample periods
2008 July 1 Nov. 5 12 5–9
2009 April 2 Nov. 17 18 12–15
2010 Mar 23 Nov. 18 18 15–25
2011 April 28 Nov. 15 18 14–18
2012 April 2 Nov. 1 19 9–15
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Results
Ions
Elements
Nutrients
Temporal trends
Spatial variation
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Ions
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Salinity, etc.
Specific conductance
2,400 µS/cm (<204‒38,700)
TDS
1,755 mg/L (117‒39,700)
Hardness
329 mg/L = very hard
Alkalinity
580 mg/L = alkaline
SAR
10
pH
8.8
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Elements
Ag, Al, As, B, Ba, Cr,
Cu, Fe, Mn, Ni, Pb,
Sb, Se, Zn
WQ standards
Acute, chronic, HH,
max
12/14
Al: 70 &100%
Cu: 6 & 20%
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Al & Cu
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Nutrients
Total N
NH4-N
NO3+NO2
Total P
TKN
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Temporal trends
Yearly
Seasonal
In situ loggers
Specific conductance
Water levels
Salt import/export
Concentration/dilution
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Interannual trends
2008
2009
2009
2008
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Specific conductance
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Seasonal trends
Inflows
Outflows Precipitation/runoff
ET
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Among-unit variability
Compare sites by
Unit & date
How well are units
mixed?
Can we modify
study design?
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Future Monitoring
2013
1 sample site per unit
2 in Unit 2 Marsh
1 sample site Long Lake Creek
1 time per month
With limited time and resources
Seasonal (e.g., spring, summer, fall)
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Summary
Assess the state of
the system
No major issues
identified
High salinity during
low water levels
Identify noteworthy
trends
Establish baselines Valid comparisons
Provide information to
support management
decisions
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Moving forward
Continue monitoring
Examine trends
Additional data?
Soils
Biotic communities
Evaluate management goals / objectives
Modeling?
Water balance information
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Available online from the Available online from the USGSUSGS publications warehouse:publications warehouse:
httphttp://pubs.usgs.gov/sir/2013/5183/://pubs.usgs.gov/sir/2013/5183/