Top Banner
Modeling of Critical Areas for DRP Runoff and Targeting Strategies Rem Confesor Jr. Research Scientist NCWQR, Heidelberg University Team Meeting #5 Great Lakes Protection Fund Grant A Phosphorus Soil Test Metric To Reduce Dissolved Phosphorus Loading to Lake Erie July 24, 2013
12

Modeling of Critical Areas for DRP Runoff and Targeting Strategies

Feb 24, 2016

Download

Documents

zenia

Modeling of Critical Areas for DRP Runoff and Targeting Strategies . Rem Confesor Jr. Research Scientist NCWQR, Heidelberg University Team Meeting # 5 Great Lakes Protection Fund Grant A Phosphorus Soil Test Metric To Reduce Dissolved Phosphorus Loading to Lake Erie July 24 , 2013. - PowerPoint PPT Presentation
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Page 1: Modeling  of Critical Areas for DRP Runoff  and Targeting Strategies

Modeling of Critical Areas for DRP Runoff and Targeting Strategies

Rem Confesor Jr.Research Scientist

NCWQR, Heidelberg University

Team Meeting #5 Great Lakes Protection Fund Grant

A Phosphorus Soil Test MetricTo Reduce Dissolved Phosphorus Loading to Lake Erie

July 24, 2013

Page 2: Modeling  of Critical Areas for DRP Runoff  and Targeting Strategies

Watershed Modeling

CONSTRAINTS:

SPACE & TIMEresolution

Page 3: Modeling  of Critical Areas for DRP Runoff  and Targeting Strategies

Precipitation

Infiltration Runoff flow

Yearly Runoff flow = (x)Precipitation + y(Infiltration) + Constant

Spatially lumped across the whole watershed, Yearly time step

Issues:

a. One precipitation value for the whole watershed.

b. Model is not a good representation of reality.

c. Coefficients are unknown: need for calibration.

A very simple conceptual model…

Page 4: Modeling  of Critical Areas for DRP Runoff  and Targeting Strategies

Precipitation (P)

Infiltration (I)Runoff

Flow (R)

Evapo-transpiration (ET)

Groundwaterrecharge (G)

Lateral subsurface

Flow (L)

Evaporation (E)

Soilstorage

(S)

S = P - ET - E - I - R; I = G + L;Discharge (Q) = (a)R + (b)L + c

Basic spatial unit

A little bit of improvement…

Page 5: Modeling  of Critical Areas for DRP Runoff  and Targeting Strategies

Digital elevation model(slope/terrain)

Land use/ crop cover

Soil typeHydrologic Response Units (HRUs)

+

+

The hydrologic response unit (HRU)- basic spatial unit:unique combination of slope, landuse, & soil.

Page 6: Modeling  of Critical Areas for DRP Runoff  and Targeting Strategies

 

Terrain

Weather

Soil

Land use/crop cover

Agricultural practices & mgt.: tillage, fertilizer, etc. 

Flow, sediment,

nutrients (N & P), etc.

The SWAT Model:

Physically-based.

Daily time step.

Long-term simulation of effects of changes in ag. management.

“RELATIVE” output changes due to these management changes.

Page 7: Modeling  of Critical Areas for DRP Runoff  and Targeting Strategies

SWAT SETUP: CROP ROTATION

2006, Corn

2007, Soybean

2008, Corn

2009, Soybean

Page 8: Modeling  of Critical Areas for DRP Runoff  and Targeting Strategies

Baseline to NoTill + IncBaseline to NoTill

Change in DRP, lb/acre P2O5

Page 9: Modeling  of Critical Areas for DRP Runoff  and Targeting Strategies

Change in DRP, lb/acre P2O5

NoTill + In TO Disc Plowed + InNoTill + Bcast TO NoTill + In

Page 10: Modeling  of Critical Areas for DRP Runoff  and Targeting Strategies

Change in Particulate P, lb/acre P2O5

Baseline to NoTill + InBaseline to NoTill

Page 11: Modeling  of Critical Areas for DRP Runoff  and Targeting Strategies

NoTill + In TO Disc Plowed + InNoTill + Bcast TO NoTill + In

Change in Particulate P, lb/acre P2O5

Page 12: Modeling  of Critical Areas for DRP Runoff  and Targeting Strategies

Rem [email protected]

419-448-2204

http://www.heidelberg.edu/academiclife/distinctive/ncwqr

THANK YOU!