watershed targeting program - usda ars pmt...stream weighting c factor k factor r factor p factor ls...
TRANSCRIPT
Watershed Targeting Program
• Presented by• Dr. Jon F. Bartholic, Director
• November 3, 2011• Washington, DC
USDA Technology Workshop
Productivity and Conservation Enhancement: Mapping, Assessing
and Tracking
Losses of Sediment and Nutrients from Fields
Slide 3
Robert Kellogg, Natural Resources AnalystNRCS Headquarters, Resources Inventory
and Assessment Division
Phosphorus Loss (pounds/acre), Baseline
Slide 4
0
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0 10 20 30 40 50 60 70 80 90 100
Aver
age
annu
al p
hosp
horu
s lo
st to
sur
face
wat
er
(pou
nds/
acre
)
Cumulative percent acres
Upper Mississippi Chesapeake Bay Great Lakes
Means:CB = 3.7
pounds/AUM = 2.7
pounds/AGL = 2.1
pounds/A
High Impact Targeting Decision Support System for BMPs to Most Effectively Reduce NPS Pollution
• HIT combines an erosion model and a sediment delivery model (SEDMOD -Spatially Explicit Delivery Model) to calculate annual sediment loading (correlated with N and P loads) to streams.
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HIT Model
Rainfall
SupportPractice
Land Cover
Landuse/Tillage
Soil ClayContent
Soil Erodibility
DEM
Delivery Ratio
Soil Erosion
SedimentYield
SurfaceRoughness
SoilTexture
Distance toStream
Weighting
C Factor
K Factor
R Factor
P Factor
LS Factor
RUSLE2
SEDMOD1
1. Fraser, R. SEDMOD: A GIS-based Delivery Model for Diffuse Sources Pollutants (doctoral dissertation). Yale University. May 1999.
2. Renard, K.; Foster, G.; Weesies, G.; McCool, D.; Yoder, D. Predicting Soil Erosion by Water: A Guide to Conservation Planning with the Revised Universal Soil Loss Equation (RUSLE). USDA, Agriculture Handbook Number 703. 1996.
New Basin Wide System
7- Select watersheds for analysis spatially, by name, HUC, or address.
The DSS – www.iwr.msu.edu\hit2
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The DSS – www.iwr.msu.edu\hit2
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- Watersheds can be shaded by erosion or sediment data, at multiple scales.
Less loading per acreMore loading per acreMost loading per acre
Least loading per acre
Within Watershed Analysis
Field Level Analysis
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Field EvaluationsResults: 70% of the time HIT maps correctly characterized the landscape. locations.
Root River Stewardship InitiativeStatement of Commitment
“Working Together for Watershed Sustainability”
Applications within the Root River Watershed
Root-Pike HIT Modeling
LeastLess
More
Most
Sediment Loading by CLU
Root-Pike HIT Modeling
LeastLess
More
Most
Sediment Loading by 10-meter pixel
Now Let’s Go to Sub-Watershed #7
LeastLess
More
Most
Sediment Loading by HUC12
#
Rank
Potential Gully Locations
Potential Gully Locations
Flow Paths
Field Level Prioritization
Catchment Loads (L-THIA)
Phosphorus 156 lbs.
Nitrogen 560 lbs.
Less loading per acre
More loading per acre
Most loading per acre
Least loading per acre
Field Level Scenarios
No Till
Grass Waterway
Filter Strip
Catchment Loads (L-THIA)
Phosphorus 156 lbs.
Nitrogen 560 lbs.
Catchment Loads (L-THIA)
Phosphorus 90 lbs.
Nitrogen 305 lbs.
Less loading per acre
More loading per acre
Most loading per acre
Least loading per acre
Questions & Answers
http://www.iwr.msu.edu