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United States Department of Agriculture

Agricultural Research Service

Grassland Soil and Water Research Laboratory
Rainbow Colored Line

Michael White
808 East Blackland Rd.
Temple, TX 76502

Phone: (254) 770-6523

Rainbow Colored Line


Rainbow Colored Line

Current and past research





Development and Testing of a TexasBest Management Practice Evaluation Tool to Aid Decision-Making in Conservation Planning on Agricultural Lands

Development of a SWAT based conservation planning tool to allow the effects of conservation measures to be evaluated prior to implementation.   This tool will predict sediment phosphorus nitrogen and bacteria losses from both cultivated and pasture fields under a wide variety of management and conservation measures.  

Research Ongoing

Current and past research



Trinity River Basin Environmental Restoration Initiative

The SWAT model was used to assess the effects of urbanization and other land use changes on sediment and nutrient delivery to reservoirs in the TrinityRiver Basin.

Research Ongoing

Evaluation of Management Scenarios on Nutrient loads in the Illinois River


Research Ongoing





Development and Validation of a Quantitative Phosphorus Loss Assessment Tool

Development and validation of an easy to use SWAT model interface to allow conservation planners to evaluate the effects of field management on phosphorus and sediment loss from individual fields.   Validated across the southern US with 283 field years of measured data with emphasis on animal manures.   Applicable to the State of Oklahomaonly.

Development and Validation of a Quantitative Phosphorus Loss Assessment Tool 2007 PhD Dissertation

PPM Plus: A Tool to Aid in Nutrient Management Plan Development ( Oklahoma Cooperative Extension Service Publication)

Monitoring Edge of Field P Loss to Validate P Loss Index for the Spavinaw Creek Watershed (Report)

A Quantitative Phosphorus Index for Conservation and Nutrient Management Plan Development ( Poster Oklahoma City, OK 2007)

Quantitative P Index Development to Meet Numeric Water Quality Standards ( Poster Ithaca, NY 2007)

Proposed Updates to the Soil and Water Assessment Tool (SWAT) Phosphorus Model. ( Poster Ithaca, NY 2007)



Modeling the LakeEuchaBasinwith SWAT 2000 in support of litigation.

This work was commissioned by the City of Tulsato determine the effect of poultry manure applications in the LakeEuchaBasin, of one of the city's water supply reservoirs. Model predictions were used by the City of Tulsain Federal Court against several poultry integrators. The case was settled out of court shortly after SWAT simulations were deemed admissible in a Dolbert hearing.

Modeling the LakeEuchaBasinUsing SWAT 2000, August 2002 ( Report, Appendix, Addendum)

Modeling Phosphorous Loading for the LakeEuchaBasin, November 2001 ( Summary, Report, Appendix)

Development of a Quantitative Phosphorus Index for Pastures in the EuchaBasin

The Pasture Phosphorus Management (PPM) Calculator is an vastly simplified interface for the SWAT 2000 model. It was developed at OklahomaStateUniversityto develop conservation and nutrient management plans in the LakeEuchaBasin. PPM Calculator puts the predictive power of a cutting edge hydrologic model in the hands of even a novice computer user.

PPM Calculator 2.0  PPM Documentation




Evaluation of Management Practices and Examination of Spatial Detail Effects Using the SWAT Model (MS Thesis)

An examination of how differing data sources effect the results of a hydrologic model, with comparisons specifically aimed at the BASINS 3.0 dataset. ( MS Thesis)


Modeling Sediment and Nutrients in the CobbCreekBasin

The SWAT model was used in conjunction with the WEPP Roads model to target critical sediment source areas in the basin. This information was used to target fields for enrolment into conservation programs with limited resources. This are was modeled in a subsequent effort to support the first TMDL in Oklahomain a nonpoint source dominated watershed.

FortCobbBasin- Modeling and Land Cover Classification, February 2003 ( Report)

Modeling Non-PointSourceComponent For the Fort Cobb TMDL, August 8, 2003 (Report)



Modeling Decision Support System Scenarios in the EuchaBasinUsing SWAT 2000

A SWAT model for the lakeEuchaBasinwas developed using several novel datasets and methods to support a webbased Decision Support System.   These data included multi image Landsat data, georeferenced soil test data and extensive conservation and nutrient management plan data from farms in the basin.   The model was calibrated via custom software using a Complex Shuffled Evolution Algorithm on a 50GHZ computer cluster.


Decision Support System


Targeting High Phosphorus Loss Areas in the SpavinawCreekBasin

The SWAT model was applied to a very high resolution data set (4 meters) to predict how phosphorus loads varies across the SpavinawCreekBasin. These data were used to identify areas which contribute a disproportionate amounts of phosphorus per unit area.

Report 2005



Modeling In-stream Nutrient Concentrations in the Illinois River

Oklahomahas a new 0.037mg/l total phosphorus limit for scenic rivers. A new in-stream phosphorus model was used with SWAT to predict what reductions in point sources and poultry manure application are required to meet the 0.037 mg/l criterion.  The in-stream mode was incorporated in to the SWAT model and is currently under testing.

December 2006 Report

Project Update 2009 Not yet available

Modeling Critical Sediment Source Areas in the StillwaterCreekBasin

The Methodology developed in the Cobb Creek Project was applied to the StillwaterCreekBasin. Again the goal was to target critical sediment source areas in the basin. 




Evaluating the Effect of Best Management Practices in the GreatSaltPlainsBasin.

SWAT was used to estimate the impact of various best management practices (BMPs) on sediment and nutrient loads. SWAT was also used to predict the spatial and temporal characteristics nutrient and sediment loads.

Hydrologic Modeling of the GreatSaltPlainsBasin, September 2001 ( Report)



Evaluating Conservation Practices Effectiveness at the Basin Scale using Remote Sensing and Hydrologic Models

The objective of this research was to evaluate the impact of conservation practices subsidized by the Oklahoma Conservation Commission on phosphorus and sediment loads in the LakeWisterBasinusing a combination of remotes sensing and model simulations.




Illinois River Riparian Targeting

This research prioritized the establishment of riparian buffers in the Illinois River(OK/AR).   A combination of remote sensing, measured migration and stream curvature were used to rank potential sites for buffer establishment.

Report not yet released (2008)



Station Derived Precipitation

NEXRAD Precipitation


Inclusion of NEXRAD data into hydrologic models and weather interpolation



Targeting HighNon-PointSource Contributing Areas in the TurkeyCreekBasin

The SWAT model was applied to a high resolution data set (10 meter) to predict how sediment and phosphorus loads vary across the TurkeyCreekBasin. These data were used to identify areas which contribute disproportionate amounts of sediment and phosphorus per unit area.   Differing satellite sensors were compared for cost effective targeting in riparian areas.




Bio-fuel Crop Yield Simulation

Potential yields for sweet sorghum and switchgrass were simulated across the State of Oklahoma.   The state was broken into 9 climate zones based on annual rainfall and soils information was included at a resolution of 200 meters.   Both dryland and irrigated simulation were included.

Predicted Sweet Sorghum Yields in Oklahomaby Soil and Climate Region <A href="/SP2UserFiles/ad_hoc/62060505MikeWh

Last Modified: 8/13/2013