Heidelberg CIG: Field Data, SWAT, & the Nutrient Tracking ... · 09/03/2017 · CIG project...
Transcript of Heidelberg CIG: Field Data, SWAT, & the Nutrient Tracking ... · 09/03/2017 · CIG project...
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Heidelberg CIG: Field Data, SWAT, & the Nutrient Tracking Tool (NTT)
Rem Confesor Jr.
NCWQR, Heidelberg University310 E. Market St., Tiffin, [email protected]
Voice: 419-448-2204
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Collaborators/PartnersProducers
SWCDs: Crawford, Erie, Sandusky, Seneca, WyandotSandusky River Watershed Coalition (SRWC)
Texas Institute for Applied Environmental Research (TIAER), Tarleton State University
IPM Institute of North AmericaUSDA-Agricultural Research Service
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Acknowledgment
USDA-NRCSConservation Innovation Grant (CIG)
No. 69-3A75-13-216
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CIG project objectives
1) EOF studies/field samplings: environmental effects of BMPs.
2) APEX and SWAT calibration and verification 3) Nutrient Tracking Tool (NTT) calibration and
verification.4) Extension and outreach
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DEMONSTRATION FARMS /
EOF STUDIES
MODELING(NTT, APEX, SWAT)
Soils, cropping systems, conservation
practices
PRODUCERSRETAILERS
STAKEHOLDERS
Weather
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Field DataTillage, Soil, and Infiltration tests
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Tillage vs Initial Infiltration
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Tillage vs Bulk Density (6-8in)
Bulk Density, g/cc
1.0 1.2 1.4 1.6 1.8 2.0 2.2
Tilla
ge P
ract
ice
Tilled
NoTill
Rot. Till
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Organic Matter, %
0 1 2 3 4 5 6 7
Soi
l Dep
th
0-8 in
2-8 in
0-2 in
%OM vs. Soil Depth
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Melich-3 Phosphurus, ppm
0 50 100 150 200 250 300
Soi
l Dep
th
0-8 in
2-8 in
0-2 in
Phosphorus vs. Soil Depth
Melich-3 Phosphorus, ppm
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Melich-3P vs Total P0-2 in depth
Total P, mg/kg
0 500 1000 1500 2000 2500
Mel
ich-
3P, p
pm
0
50
100
150
200
250
300
350
Y = 13.327 + 0.090XR2 = 0.59
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Melich-3P vs Total P2-8" depth
Total P, mg/kg
0 500 1000 1500 2000 2500
Mel
ich-
3P, p
pm
0
50
100
150
200
250
300
350
Y = 5.982 + 0.084XR2 = 0.55
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SUMMARY
• Higher initial infiltration in no-till vs. tilled.• Lower bulk density in no-till vs. tilled.• Median OM is about 2% with some fields
less than 1% and as high as 6%.• Higher available soil phosphorus at the top
0-2 inches (~55ppm) than at the lower 2-8 cm (37 ppm): soil stratification.
• The soil available P (M3) is less than 10% of the total soil P.
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SWAT Modeling
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Simulated annual dissolved P exports
2008 2009
2010 2011
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Simulated annual dissolved P exports, kg/ha
2008 2009
2010 2011
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Simulated annual sediment yield
2008 2009
2010 2011
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SUMMARYCritical areas are changing with time and space.
Traditional concept of CSA may not be applicable to NW OH (tile drain connectivity)
Targeting CSAs may not be enough to attain load reduction goals.
Watershed-wide implementation of “cultural” (e.g. 4R) BMPs rather than structural might be more appropriate in reducing loading exports.
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THE Nutrient Tracking Tool (NTT)
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0.0
2.0
4.0
6.0
8.0
10.0
12.0
CORN SOYBEANS WHEAT
Field1 Field2 Observed
Met
ric to
ns/h
ecta
re
CROP
NTT CROP YIELD vs. OBSERVED
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Total P Total NFIELD1(30 yrs) 0.86 12.6Observed(2015) 0.74 22.4
FIELD2 (30yrs) 0.92 15.8Observed(2015) 1.09 15.4
Total field exports, kg/ha
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Tile drain exports, kg/ha
Dis P Total NField1(30 yrs) 0.22 8.14Observed(2015) 0.19 22.33
Field2 (30 yrs) 0.22 10.18Observed(2015) 0.19 12.90
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SUMMARY
• NTT is a web-based APEX model• “User-friendly” and accessible to anyone
with internet connection• Uses field data: soil test, BD, etc.• Calculate nutrient and sediment exports,
crop yield• Powerful tool to compare different practices
at field level
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EXTENSION
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NEXT STEPS/ONGOING
• Continue to verify the NTT with EOF data.
• Compare OM vs. Bulk Density vs. Infiltration
• Pilot study in Erie and Huron County: pay for performance program using NTT
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Take Home• 40% P reduction?• Widespread BMP adoption is necessary• Each field is unique from each other!• Actual implementation: “the devil is in the
details”• Field by field basis of implementation.• APEX/NTT is a potential tool to guide
implementation.
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Rem Confesor Jr., Ph.D.Senior Research Scientist
National Center for Water Quality ResearchHeidelberg University
310 E. Market St., Tiffin, [email protected]
Voice: 419-448-2204
THANKS!!!