water quality: an indiana primer - sustainable natural resources task force 3/28/12
DESCRIPTION
TRANSCRIPT
![Page 1: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/1.jpg)
WATER QUALITY: AN INDIANA PRIMER
Jeff Frey
Indiana Water Science Center
March 28, 2012
![Page 2: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/2.jpg)
NATURAL STREAMS
Reference or unimpacted streams
• Diverse instream habitat and
extensive riparian buffers
– Riffle-run-pool
• Low concentrations of:
– Nutrients
– Pesticides
– Other stressor/ contaminants
• High dissolved oxygen
• Cooler temperatures
Water Chemistry and Habitat
![Page 3: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/3.jpg)
UNIMPACTED STREAMS Reference or unimpacted streams
• Diverse biological communities
– Sensitive species
– More taxa
– Stronger and more complex
food web
• Few unimpacted sites in the region
of the Cornbelt we call Indiana
Biological Response
![Page 4: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/4.jpg)
HOW ARE INDIANA STREAMS?
Impaired Streams
• Clean Water Act
– 303d and 305b list
• 26 parameters
– Acute
– Chronic
• About 3,000
impaired reaches
IMPAIRMENT 2008 2010 Rank AGRICULTURAL AND URBAN IMPAIRMENTS
1 E. COLI 930 979
OIL AND GREASE 3 5
PESTICIDES 1 1
NUTRIENTS AND NUTRIENT RELATED IMPAIRMENTS
5 DISSOLVED OXYGEN 78 163
6 NUTRIENTS 63 110
9 PHOSPHORUS 50 50
ALGAE 20 20
TASTE AND ODOR 12 12
AMMONIA 6 8
METALS AND MAJOR IONS
2 PCBs (FISH TISSUE) 653 612
4 MERCURY (FISH TISSUE) 324 355
7 PCBs (WATER) 0 69
8 DIOXIN (WATER) 4 69
10 MERCURY (WATER) 0 47
FREE CYANIDE 0 27
PH 9 18
CHLORIDE 14 16
SULFATE 27 1
TOTAL CYANIDE 15 0
LEAD 4 0
NICKEL 1 0
COPPER 1 0
BIOLOGICAL COMMUNITIES AND RELATED IMPAIRMENTS
3 IMPAIRED BIOTIC COMMUNITIES 421 570
TEMPERATURE 0 14
SILTATION 3 3
TOTAL DISSOLVED SOLIDS 42 0
![Page 5: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/5.jpg)
From Dana Thomas, USEPA
HOW DOES INDIANA COMPARE?
![Page 6: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/6.jpg)
IMPAIRED
STREAMS:
NUTRIENTS
303d listings
![Page 7: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/7.jpg)
WHAT ARE NUTRIENTS? • Elements required for growth in plants and
animals
• Macronutrients (6): C, H, O, N, P, S
• Micronutrients (20): B, F, Na, Mg, Si, Cl, K, Ca, V,
Cr, Mn, Fe, Co, Ni, Cu, Zn, Se, Mo, Sn, I
• Most macro- and micronutrients are generally
readily available and rarely limit growth
–Exceptions: N, P, and to a lesser extent Si
NUTRIENT PRIMER
![Page 8: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/8.jpg)
NITROGEN AND PHOSPHORUS
Nitrogen: amino acids (all proteins), nucleic
acids (DNA, RNA)
Phosphorus: nucleic acids, organelle walls (P-
lipids), energy molecules (ADP/ATP/NADP)
A. Acid (Tryptophan)
DNA
Phospholipid Bilayer
From Michael Paul, Tetratech
NUTRIENT PRIMER
![Page 9: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/9.jpg)
NUTRIENT SOURCES Agricultural • Fertilizers
• Animal feed lots
– Confined
– Unconfined
• Septic systems
Urban • Waste Water
Treatment Plants
• Lawn fertilizers
• Industry
Natural occurrences
![Page 10: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/10.jpg)
Excess Nutrients
Aquatic Life
Recreation
Human Health
Community
Structure
Dissolved
Oxygen
Suitability for
Recreation
(Aesthetics)
Taste &
Odor
Increased
Treatment
Toxicity
IMPACTS OF EXCESS NUTRIENTS
NUTRIENT PRIMER
![Page 11: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/11.jpg)
WHERE ARE THE
NUTRIENT
“HOTSPOTS”?
Total Nitrogen
• Cornbelt states
dominate
• Indiana has some of
the highest ranked
From: Roberson and others, 2009
![Page 12: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/12.jpg)
WHERE ARE THE
NUTRIENT
“HOTSPOTS”?
Total Phosphorus
• Cornbelt states
dominate BUT…
• Indiana less than
other states
• WHY?
From: Roberson and others, 2009
![Page 13: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/13.jpg)
HOW DO NUTRIENTS GET INTO STREAMS?
• Hydrology – Fast
– Slow
• Chemistry – Dissolved
• Nitrogen
– Particulate • Phosphorus
NUTRIENT PRIMER
![Page 14: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/14.jpg)
How Do Nutrients Get Into Streams?
Case Study: Sugar Creek
![Page 15: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/15.jpg)
NUTRIENTS CHANGE SEASONALLY
Total Nitrogen
![Page 16: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/16.jpg)
WHY RELATIONS BETWEEN NUTRIENTS
AND ALGAL BIOMASS ARE RARELY FOUND?
From Munn and
others, 2010
Nutrient Criteria Approaches: Stressor-Response
![Page 17: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/17.jpg)
THE LACK OF RELATIONS SUGGESTS
BIOLOGICAL RESPONSES ARE NEEDED
• Invertebrate
• Fish
• Algae
• States with Diatom IBI’s: KY, MI, MT
Nutrient Criteria Approaches: Stressor-Response
![Page 18: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/18.jpg)
Daily DO Fluctuations
From Munn and others,
in progress
States using: Ohio
Minnesota
Illinois
Nutrient Criteria Approaches: Stressor-Response
![Page 19: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/19.jpg)
HOW DO WE KEEP NUTRIENTS OUT OF
STREAMS?
• Nutrient inputs
• Nutrient management plans
• Transport of nutrients
and sediment
• Conservation tillage
• Buffers
• Transformation of nutrients
• Wetlands
• Bioreactors
• 2-stage ditches
BEST MANAGEMENT PRACTICES (BMPS)
![Page 20: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/20.jpg)
PHOSPHORUS DECREASES AS CROPLAND
IN THE RIPARIAN BUFFER INCREASES
![Page 21: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/21.jpg)
AS THE AMOUNT OF CROPLAND IN THE
RIPARIAN BUFFER INCREASES
![Page 22: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/22.jpg)
MODIFIED STREAMS HAVE DECREASED
NATURAL ABILITY TO REMOVE NITROGEN
Denitrification • Contact time
with bacteria
• Slower velocity
![Page 23: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/23.jpg)
Has Water Quality Improved with the Implementation of Agricultural
Management Practices?
Case Study: Sugar Creek
![Page 24: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/24.jpg)
What are agricultural management
practices?
Conservation tillage
Case Study: Sugar Creek
![Page 25: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/25.jpg)
No Till Conservation Tillage Increased Through the 1990’s
From Evans
& others,
2000 (CTIC)
• Transect
data
• Randomly
selected
• Repeated
• “Window
survey”
![Page 26: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/26.jpg)
No Till Conservation Tillage Increased Through the 1990’s
From
Evans
and
others,
2000 Soybeans 1990 – 2%
1998 – 72%
2000 – 74%
Corn 1990 – 2%
1998 – 5%
2000 – 8%
![Page 27: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/27.jpg)
Sediment Concentrations over Time
0.80
1.00
1.20
1.40
1.60
1.80
2.00
1992 1994 1996 1998 2000 2002 2004 2006
Year
Lo
g M
ed
ian
Su
sp
en
de
d s
ed
ime
nt
co
nc
en
tra
tio
ns
Case Study: Sugar Creek
![Page 28: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/28.jpg)
Sediment Concentrations over Time
0
50
100
150
200
250
300
350
400
450
500
0
500
1,000
1,500
2,000
2,500
3,000
Discharge (ft3/sec)
Suspended Sediment (mg/L)
Case Study: Sugar Creek
![Page 29: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/29.jpg)
Sediment Concentrations over Time
0
50
100
150
200
250
300
350
400
450
500
0
500
1,000
1,500
2,000
2,500
3,000
May-92 May-93 May-94 May-95 May-96 May-97 May-98 May-99 May-00 May-01 May-02 May-03 May-04 May-05 May-06
Discharge (ft3/sec)
Suspended Sediment (mg/L)
1992-2006: No significant change
1992-1999: 30.6% decrease
p-value = 0.036
Case Study: Sugar Creek
![Page 30: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/30.jpg)
What are agricultural management
practices?
Buffer Strips Case Study: Sugar Creek
![Page 31: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/31.jpg)
Nitrate Concentrations over Time
0
2
4
6
8
10
12
14
0
500
1,000
1,500
2,000
2,500
3,000
Discharge Nitrate
Case Study: Sugar Creek
![Page 32: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/32.jpg)
Nitrate Concentrations over Time
0
2
4
6
8
10
12
14
0
500
1,000
1,500
2,000
2,500
3,000
Discharge Nitrate
1992-2006: No significant change
1992-1999: 14.3% decrease
p-value = 0.363
Case Study: Sugar Creek
![Page 33: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/33.jpg)
Population in Hancock County Has Rapidly Increased
40,000
45,000
50,000
55,000
60,000
65,000
70,000
19
90
19
91
19
92
19
93
19
94
19
95
19
96
19
97
19
98
19
99
20
00
20
01
20
02
20
03
20
04
20
05
20
06
20
07
Population in Hancock County
Case Study: Sugar Creek
![Page 34: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/34.jpg)
Population in Hancock County Has Rapidly Increased
Hancock County, Indiana
1
1.5
2
2.5
3
3.5
4
1992 1994 1996 1998 2000 2002 2004 2006 2008
Year
Ann
ual c
hang
e in
pop
ulat
ion
(%)
Case Study: Sugar Creek
![Page 35: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/35.jpg)
BIOLOGICAL COMMUNITIES CAN
HELP SHOW LOW NUTRIENT SITES
![Page 36: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/36.jpg)
A Conceptual Model: Positive Biological Response to Nutrients
NUTRIENT CONCENTRATIONS
BIO
LO
GIC
AL
RE
SP
ON
SE
Thresholds
Oligotrophic
Eutrophic
Low nutrient breakpoint
High nutrient breakpoint
Nutrient Criteria Approaches: Stressor-Response
![Page 37: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/37.jpg)
0
10
20
30
40
50
60
70
80
0.0 1.0 2.0 3.0 4.0 5.0 6.0
Pe
rce
nt
Ac
hn
an
thid
ium
min
uti
ss
ium
Total Nitrogen (mg/L)
0.05 Confidence Intervals
Breakpoint
0.643 mg/L
Example of Negative Response to Nutrients
Algal response in the
Glacial North Diatom Ecoregion
Nutrient Criteria Approaches: Stressor-Response
![Page 38: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/38.jpg)
BIOLOGICAL COMMUNITIES CAN
HELP SHOW LOW NUTRIENT SITES
• Low nutrients, high algal
biomass (uptake sites)
– Stonerollers
– Creek chubs
• Low nutrients, low algal
biomass (oligotrophic)
– Longear sunfish
– Spotfin shiners
![Page 39: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/39.jpg)
WHAT DOES INDIANA CONTRIBUTE
DOWNSTREAM?
Wabash River
Ohio River
Major Sub-basins of the Mississippi River
![Page 40: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/40.jpg)
Super Gages White River at Hazleton, IN (03374100)
http://www.ipcamhost.net/test_player.jsp?id=
18&path=usgs-in
http://waterdata.usgs.gov/in/nwis/uv/?site_no=03374100&PARAmeter_cd=00400,00095,00010
Suspended
sediment
Discharge
![Page 41: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/41.jpg)
Super Gages
Eagle Creek at Zionsville, IN (03353200) http://waterdata.usgs.gov/in/nwis/uv/?site_no=03353200&PARAmeter_cd=00400,00095,00010
Nitrate
Discharge
![Page 42: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/42.jpg)
Surrogates
1
10
100
1,000
1 10 100 1,000
Su
sp
en
de
d s
ed
imen
t co
ncen
trati
on
, m
g/L
Turbidity, Formazin nephelometric units
R2 = 0.96
n = 13
White River at Hazleton, IN
Suspended Sediment vs. Turbidity
Other uses: • Phosphorus
• Algal biomass
![Page 43: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/43.jpg)
QA/QC leads to accurate data
2
2.5
3
3.5
4
4.5
5
0
20
40
60
80
100
120
140
160
180
8/1 8/3 8/5 8/7 8/9 8/11 8/13 8/15
Gag
e h
eig
ht,
feet
Tu
rbid
ity, F
orm
azin
nep
helo
metr
ic
un
its
Turbidity, raw data Turbidity, corrected Gage height
Initial Turbidity
Raw 48
Corrected 48
Final Turbidity
Raw 106
Corrected 76
Peak Turbidity
Raw 161
Corrected 140
Monitoring Primer
White River at Hazleton, IN
![Page 44: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/44.jpg)
INDIANA WATER
MONITORING COUNCIL
http://www.inwmc.org/
![Page 45: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/45.jpg)
PRIORITY PROJECTS
Optimization of:
Water-quality networks
Streamgages
Indiana Water Monitoring Council
![Page 46: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/46.jpg)
REMAINING ISSUES
• Is there a sufficient nutrient gradient to
identify breakpoints?
• Can regional breakpoints be used across
multiple states?
• Local vs Downstream Impacts: Account
for downstream impacts
• There can be nutrient impairment even if
there is a “good” IBI score
Nutrient Criteria Approaches
![Page 47: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/47.jpg)
NUTRIENTS CAN BE REWARDING
Jeff Frey
Indiana Water Science Center
317-290-3333 x151
![Page 48: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/48.jpg)
APPROACHES FOR DEVELOPING
NUTRIENT CRITERIA Multiple approaches:
•Classification
•Reference condition
•Stressor – response
•Mechanistic models
•Literature and Best Professional
Judgment
•Multiple lines of evidence
![Page 49: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/49.jpg)
USEPA REQUIREMENTS FOR STATES
Numerical criteria
•Causal variables
–TP
–TN
•Response variables
–Chl a (periphyton and seston)
–Transparency/turbidity
![Page 50: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/50.jpg)
Biological Response
Study Location TN (mg/L) TP (mg/L)
Low High Low High Smith Nutrient IBI (2007) New York 0.34 1.40 0.018 0.065 NEET O/E Midwest 0.58 1.34 0.026 0.100 Crain and Caskey (2010) Kentucky wadable -- -- 0.032 -- Miltner (2010) Ohio -- -- 0.038 -- Heiskary et al (2010) Minnesota (North and Northwest) -- 1.77 0.040 Robertson et al (2008) Wisconsin (large rivers – inverts) 0.53 1.99 0.040 0.150 Robertson et al (2006) Wisconsin (wadable streams – fish) 0.54 -- 0.055 0.067 Frey et al (2011) wadable Glacial North (MN, WI, MI) 0.60 1.20 0.030 0.100 NEET EPT richness Midwest, West 0.60 -- 0.052 0.174 Wang et al (2007) Wisconsin 0.60 -- -- -- Miltner and Rankin (1998) Ohio 0.61 1.65 0.060 0.170 Robertson et al (2006) Wisconsin (wadable streams - inverts 0.61 1.11 0.088 0.091 Robertson et al (2008) Wisconsin (large rivers) fish 0.63 1.97 0.079 0.139 Caskey et al (2010) Indiana wadable 2.40 3.30 0.042 0.129 Heiskary et al (2010) Minnesota (south) 1.77 3.60 Frey et al (2011) Central and Western Plains (IL, IN, OH) 1.70 3.50 0.075 0.133
Background nutrient concentrations or trophic levels Dodds et al (1998) National, 33rd and 66th percentiles 0.70 1.70 0.025 0.075 Robertson et al (2006) Wisconsin (median reference) wadable 0.61 1.10 0.035 -- Robertson et al (2008) Wisconsin (median reference) large rivers 0.40 0.70 0.035 --
MULTIPLE LINES OF EVIDENCE
![Page 51: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/51.jpg)
Possible criterion value 0 50
75% 25%
Reference
sites
All
sites
FREQUENCY DISTRIBUTION APPROACH
Nutrient Criteria Approaches: Reference Condition
25 mg/L 20 mg/L
23 mg/L
![Page 52: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/52.jpg)
Nutrient concentration
Ecolo
gic
al attribute
Effects Threshold Approach
Nutrient Criteria Approaches: Stressor-Response
![Page 53: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/53.jpg)
BIOLOGICAL CONDITION IMPROVES AS
AGRICULTURAL INTENSITY INCREASES
![Page 54: Water Quality: An Indiana Primer - Sustainable Natural Resources Task Force 3/28/12](https://reader035.vdocuments.us/reader035/viewer/2022062616/5495af45b479593a508b457e/html5/thumbnails/54.jpg)
SIMILAR BREAKPOINTS ACROSS COMMUNITIES
0
2
4
6
8
10
12
14
16
18
20
0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00
Bio
logi
cal a
ttri
bu
te r
esp
on
se
Total Nitrogen in mg/L
Glacial North diatom ecoregion
Central and Western Plains diatom ecoregion
Low nutrient breakpoint 0.60 mg/L
High nutrient breakpoint 1.2 mg/L
Nutrient Criteria Approaches: Multiple lines of Evidence