Projects

Object Modeling and Scaling of Landscape Processes and Conservation Effects in Agricultural Systems Appropriated (D)   Accession Number: 411543

Enhanced System Models and Decision Support Tools to Optimize Water Limited Agriculture Appropriated (D)   Accession Number: 414564

Develop, Test, and Improve the Needed Science Modules and Models of Agricultural Systems in Oms for Various Applications Specific Cooperative Agreement (S)   Accession Number: 413434

Publications

A Step by Step Procedure for Parameterization, Calibration, Validation, and Application of a System Model in Field Research - (Abstract) - (05-Aug-09)

Economic Risk Analysis of Agricultural Tillage Systems Using the SMART Stochastic Efficiency Software Package - (Proceedings/Symposium)

Ascough II, J.C., Fathelrahman, E.M., Vandenberg, B.C., Green, T.R., Hoag, D.L. 2009. Economic Risk Analysis of Agricultural Tillage Systems Using the SMART Stochastic Efficiency Software Package. World IMACS Congress and MODSIM09 International Congress on Modelling and Simulation. p. 463-469.

An Exploratory Investigation on the Invasiveness of Environmental Modeling Frameworks - (Proceedings/Symposium)

Lloyd, W., David, O., Ascough II, J.C., Rojas, K.W., Carlson, J.R., Leavesley, G.H., Krause, P., Green, T.R., Ahuja, L.R. 2009. An Exploratory Investigation on the Invasiveness of Environmental Modeling Frameworks. World IMACS Congress and MODSIM09 International Congress on Modelling and Simulation.p. 909-915.

A Component-Based Distributed Watershed Model for the USDA CEAP Watershed Assessment Study - (Abstract)

Ascough II, J.C., David, O., Krause, P., Green, T.R., Heathman, G.C., Kralisch, S., Ahuja, L.R. 2009. A Component-Based Distributed Watershed Model for the USDA CEAP Watershed Assessment Study. Meeting Abstract.

Space-Time Dynamics of Soil Water and Process Interactions in Semi-Arid Terrain, Colorado, USA - (Proceedings/Symposium)

Green, T.R., Erskine, R.H., Murphy, M.R., Ma, L., Ascough II, J.C., Mcmaster, G.S., Dunn, G.H., Ahuja, L.R. 2009. Space-Time Dynamics of Soil Water and Process Interactions in Semi-Arid Terrain, Colorado, USA. International Congress on Modeling and Simulation Proceedings. p. 1851-1857.

Effects of Estimating Soil Hydraulic Properties and Root Growth Factor on Soil Water Balance and Crop Production - (Peer Reviewed Journal)

Ma, L., Hoogenboom, G., Saseendran, S.A., Bartling, P.N., Ahuja, L.R., Green, T.R. 2009. Effects of Estimating Soil Hydraulic Properties and Root Growth Factor on Soil Water Balance and Crop Production. Agronomy Journal. 101:572-583.

Fractal Analyses of Steady Infiltration and Terrain on an Undulating Agricultural Field - (Peer Reviewed Journal)

Green, T.R., Dunn, G.H., Erskine, R.H., Salas, J.D., Ahuja, L.R. 2009. Fractal Analyses of Steady Infiltration and Terrain on an Undulating Agricultural Field. Vadose Zone Journal. 8(2)310-320.

Spatial Features, Scaling and Simulation in Semi-Arid Agricultural Terrain - (Abstract)

Green, T.R., Erskine, R.H., Ma, L. 2008. Spatial Features, Scaling and Simulation in Semi-Arid Agricultural Terrain. American Society of Agronomy Meetings. Paper No. 257-9.

Scaling Terrain Attributes By Fractal Methods - (Abstract)

Erskine, R.H., Green, T.R., Niemann, J.D., Ramirez, J.A. 2008. Scaling Terrain Attributes By Fractal Methods. Annual American Geophysical Union Hydrology Days.

Tillage Effects on Soil Hydraulic Properties in Space and Time: State of the Science - (Review Article)

Strudley, M.W., Green, T.R., Ascough Ii, J.C. 2008. Tillage Effects on Soil Hydraulic Properties in Space and Time: State of the Science. International Journal of Soil and Tillage Research. 99:4-48. 2008.

Global Analogues of Climate Change Effects on Agriculture and Groundwater Between Hydrologically Similar Regions of the World - (Abstract)

Green, T.R., Bates, B.C., Charles, S.P., Fathelrahman, E.M. 2008. Global Analogues of Climate Change Effects on Agriculture and Groundwater Between Hydrologically Similar Regions of the World. Meeting Abstract.

Tradeoff Analysis Between Economic Development and Climate Change Adaptation Strategies for the Nile River Basin - (Abstract)

Fathelrahman, E.M., Babiker, M., Strzepek, K., Ascough II, J.C., Green, T.R. 2008. Tradeoff Analysis Between Economic Development and Climate Change Adaptation Strategies for the Nile River Basin. Meeting Abstract. p.61.

Relating Crop Yield Patterns to Terrain Attributes Under Water-Limited and Waterlogged Conditions - (Abstract)

Erskine, R.H., Green, T.R., Starr, G.C. 2008. Relating Crop Yield Patterns to Terrain Attributes Under Water-Limited and Waterlogged Conditions. International Conference on Precision Agriculture Abstracts & Proceedings.

Spatial Variability in Wheat Phenology Across a Landscape - (Abstract)

Mcmaster, G.S., Green, T.R., Erskine, R.H., Edmunds, D.A. 2007. Spatial Variability in Wheat Phenology Across a Landscape. American Geophysical Union.

Development and Testing of a Terrain-Based Hydrologic Model for Spatial Hortonian Infiltration and Run-Off/on - (Peer Reviewed Journal)

Meng, H., Green, T.R., Salas, J., Ahuja, L.R. 2008. Development and testing of a terrain-based hydrologic model for spatial hortonian infiltration and run-off/on . Environmental Modeling & Software. 23 (6): 794-812.

Spatial Variability and Scaling of Infiltration on Undulating Agricultural Terrain - (Abstract)

Green, T.R., Ahuja, L.R., Dunn, G.H., Ascough Ii, J.C., Mcmaster, G.S., Ma, L., Erskine, R.H., Salas, J.D., Palic, D.B., Murphy, M.R. 2007. Spatial Variability and Scaling of Infiltration on Undulating Agricultural Terrain. American Society of Agronomy Meetings New Orleans, November 7,2007 (282-3).

Potential Impacts of Climate Change and Human Activity on Subsurface Water Resources - (Peer Reviewed Journal)

Green, T.R., Taniguchi, M., Kooi, H. 2007. Potential Impacts of Climate Change and Human Activity on Subsurface Water Resources. Vadose Zone Journal 2007;6 531-532. DOI: 10.2136/vzj2007.0098.

Simulated Effects of Soil Temperature and Salinity on Capacitance Sensor Measurements - (Peer Reviewed Journal)

Schwank, M., Green, T.R. 2007. Simulated Effects of Soil Temperature and Salinity on Capacitance Sensor Measurements. Sensors 2007 (4/26/2007), 7, 548-577.

Physically Based Simulation of Potential Effects of Carbon Dioxide Altered Climates on Groundwater Recharge - (Peer Reviewed Journal)

Green, T.R., Bates, B., Charles, S., Fleming, P. 2007. A physically based method for simulating effects of CO2-altered climates on groundwater recharge. Vadose Zone Journal 2007; 6: 597-609.

Digital Elevation Accuracy and Grid Cell Size: Effects on Estimated Terrain Attributes - (Peer Reviewed Journal)

Erskine, R.H., Green, T.R., Ramirez, J.A., Macdonald, L.H. 2007. Digital elevation accuracy and grid cell size: effects on estimated terrain attributes. Soil Science Society of America Journal. Vol 71: No4, July-August 2007, pp1371-1380; doi:10.2136/ssaj2005.0142.

Laboratory and Theoretical Investigations of a Ring-Capacitor Sensor - (Abstract)

Schwank, M., Green, T.R. 2007. Laboratory and Theoretical Investigations of a Ring-Capacitor Sensor. Proceedings of the International Soil Moisture Technology Conference. Honolulu, HI. March 20,2007.

Assessing Modeled Spatial and Temporal Variability in Soil Moisture Using Automated, Multi-Objective, Step-wise Calibration - (Abstract)

Strudley, M.W., Green, T.R., Erskine, R.H., David, O., Umemoto, M. 2007. Assessing Modeled Spatial and Temporal Variability in Soil Moisture Using Automated, Multi-Objective, Step-wise Calibration. Annual Hydrology Days Conference Proceedings.

Relating Crop Yield to Topographic Attributes Using Spatial Analysis Neural Networks and Regression - (Peer Reviewed Journal)

Green, T.R., Salas, J., Martinez, A., Erskine, R.H. 2007. Relating crop yield to topographic attributes using spatial analysis neural networks and regression . Geoderma.

Scaling up preferential flow in unsaturated undulating terrain due to anisotropic soil hydraulic conductivity and other potential mechanisms - (Abstract)

Green, T.R., Freyberg, D., Constanz, J., Ahuja, L.R. 2006. Scaling up preferential flow in unsaturated undulating terrain due to anisotropic soil hydraulic conductivity and other potential mechanisms. International Conference on Preferential Flow and Transport Processes in Soil. Zurich, Switzerland. November 7,2006.

Temporally Stable Patterns in Grain Yield and Soil Water on a Dryland Catena - (Peer Reviewed Journal)

Andales, A.A., Green, T.R., Ahuja, L.R., Erskine, R.H., Peterson, G.A. 2007. Temporally stable patterns in grain yield and soil water on a dryland catena. Agricultural Systems 94 (2007) 119-127).

Laboratory Characterization of Commercial Capacitance Sensor for Estimating Permittivity and Inferring Soil Water Content - (Peer Reviewed Journal)

Schwank, M., Green, T.R., Matzler, C., Benedickter, H., Fluehler, H. 2006. Laboratory Characterization of Commercial Capacitance Sensor for Estimating Permittivity and Inferring Soil Water Content. Vadose Zone Journal.

Comparison of Grid-Based Algorithms for Computing Upslope Contributing Area - (Peer Reviewed Journal)

Erskine, R.H., Green, T.R., Ramirez, J.A., Macdonald, L.H. Comparison of grid-based algorithms for computing upslope contributing area. Water Resources Research. Vol. 42, W09416, doi:10.1029/2005WR004648, 2006.

Modeling Spatial-Temporal Soil Water and Overland Flow in a Dryland Wheat-Fallow Field Using Maria-Gis - (Abstract)

Green, T.R., Ascough II, J.C., Erskine, R.H., Vandenberg, B.C., Ahuja, L.R. 2006. Modeling spatial-temporal soil water and overland flow in a dryland wheat-fallow field using maria-gis. World Congress of Soil Science. Philadelphia, PA. 7/9-7/15/2006

Laboratory Characterization of a Commercial Capacitance Sensor for Estimating Permittivity and Inferring Soil Water Content - (Book/Chapter)

Schwank, M., Green, T.R., Matzler, C., Benedickter, H., Schulin, R., Fluehler, H. 2006. Laboratory Characterization of a Commercial Capacitance Sensor for Estimating Permittivity and Inferring Soil Water Content. Vadose Zone Journal.

Spatial Scaling of Surface Water Infiltration and Its Implications for Estimating Groundwater Recharge - (Abstract)

Green, T.R. 2006. Spatial scaling of surface water infiltration and its implications for estimating groundwater recharge. Meeting Abstract.Intl. Symposium on Groundwater Resources Assessment under the Pressures of Humanity and Climate Change. Kyoto, Japan, April 4-6, 2006.

Effect of Soil Water on Apparent Soil Electrical Conductivity and Texture Relationships in a Dryland Field. - (Peer Reviewed Journal)

Mccutsheon, M., Fahahani, J., Stednick, J., Buchleiter, G.W., Green, T.R. 2006. Effect of Soil Water on Apparent Soil Electrical Conductivity and Texture Relationships in a Dryland Field. Biosystems Engineering (2006) 94,19-3

Effect of Soil Water on Apparent Soil Electrical Conductivity and Texture Relationships in a Dryland Field. - (Peer Reviewed Journal)

Mccutcheon, M.C., Farahani, H., Stednick,, J.D., Buchleiter, G.W., Green, T.R. 2006. Effect of soil water on apparent soil electrical conductivity and texture relationships in a dryland field. Biosystems Engineering.(2006) 94 (1), 19-32

An Improved Agricultural System Model for Space-Time Simulation of Agricultural Landscape Variability - (Abstract)

Ascough II, J.C., Ma, L., Green, T.R., Flerchinger, G.N., Mcmaster, G.S., Ahuja, L.R., Vandenberg, B.C. 2006. An improved agricultural system model for space-time simulation of agricultural landscape variability. World Congress of Soil Science. July 9-15,2006.

Key Criteria and Selection of Sensitivity Analysis Methods Applied to Natural Resource Models - (Proceedings/Symposium)

Ascough Ii, J.C., Green, T.R., Ma, L., Ahuja, L.R. 2005. Key criteria and selection of sensitivity analysis methods applied to natural resource models. Modsim 2005 International Congress on Modeling and Simulation, Modeling and Simulation Society of Australia and New Zealand, Melbourne, Australia. December 12-15, 2005. p2463-2469.

Key Criteria and Selection of Sensitivity Analysis Methods Applied to Natural Resource Models - (Proceedings/Symposium)

Ascough Ii, J.C., Green, T.R., Ma, L., Ahuja, L.R. 2005. Key criteria and selection of sensitivity analysis methods applied to natural resource models. International Congress on Modeling and Simulation Proceedings. Salt Lake City, UT, November 6-11,2005.

Crop Canopy and Residue Rainfall Interception Effects on Water and Crop Growth - (Peer Reviewed Journal) - (01-Nov-05)

Crop Canopy and Residue Rainfall Interception Effects on Water and Crop Growth - (Peer Reviewed Journal)

Kozak, J.A., Ahuja, L.R., Green, T.R., Ma, L. 2007. Crop canopy and residue rainfall interception effects on water and crop growth. Hydrological Processes. 21:229-241, March 2007.

Modeling a Wheat-Maize Double Cropping System in China Using Two Plant Growth Modules with Rzwqm - (Peer Reviewed Journal)

Yu, Q., Saseendran, S.A., Ma, L., Flerchinger, G.N., Green, T.R., Ahuja, L.R. 2006. Modeling a wheat-maize double cropping system in china using two plant growth modules with rzwqm. Agricultural Systems. 89(2-3):457-477.2006.

Scaling Infiltration and Other Soil Water Processes Across Diverse Soil Textural Classes - (Abstract)

Kozak, J.A., Ahuja, L.R., Green, T.R. 2005. Scaling infiltration and other soil water processes across diverse soil textural classes. American Geophysical Union 2005 Annual Meeting. SanFrancisco, CA. Dec. 7, 2005.

Laboratory Characterization of Capacitance Sensors for Measuring Soil Water Content - (Abstract)

Green, T.R., Schwank, M., Fluehler, H. 2005. Laboratory Characterization of Capacitance Sensors for Measuring Soil Water Content. Fall Meeting of theTrans American Geophysical Union, San Francisco, CA. December 5-9, 2005.

A Dem-Based Watershed Model with Spatial Hortonian Infiltration and Ruh-Off/on - (Abstract)

Meng, H., Green, T.R., Salas, J.D., Ahuja, L.R. 2005. A DEM-based watershed model with spatial hortonian infiltration and ruh-off/on. Trans American Geophysical Union, 86 (52), Fall Meeting Supplement, Abstract H13H-1400.

Evaluating Nitrogen and Water Management of a Double Cropping System in China - (Peer Reviewed Journal)

Hu, C., Saseendran, S.A., Green, T.R., Ma, L., Li, X., Ahuja, L.R. 2006. Evaluating nitrogen and water management of a double cropping system in china. Vadose Zone Journal. 5:493-505.2006.

Spatial Water Quality Modeling Framework Development Using Arcgis9 - (Proceedings/Symposium)

Ascough II, J.C., Green, T.R., Ahuja, L.R., Ma, L., Vandenberg, B.C. 2005. Spatial water quality modeling framework development using ArcGIS9. Proceedings 05-2082. 2005 ASAE Annual International Meeting, Tampa, FL. July 17-20. http://asae/frymulti.com/techpapers.asp?confid=tfl2005.

Aggregation and Sampling in Deterministic Chaos: Implications for Chaos Identification in Hydrological Processes - (Peer Reviewed Journal)

Salas, J.D., Kim, H.S., Burlando, P., Green, T.R. 2005. Aggregation and sampling in deterministic chaos: implications for chaos identification in hydrological processes. Agronomy Abstracts. Nonlinear Processes in Geophysics, 12, 557-567, 2005.

Scaling and Estimation of Evaporation and Transpiration of Water Across Soil Textures - (Peer Reviewed Journal)

Kozak, J.A., Ahuja, L.R., Ma, L., Green, T.R. 2005. Scaling and estimation of evaporation and transpiration of water across soil textures. Vadose Zone Journal. 4:418-427. 2005.

Modeling Spatial Variability in Agriculture: the Agsimsgis Water Quality Tool - (Abstract)

Ascough Ii, J.C., Green, T.R., Ahuja, L.R., Vandenberg, B.C., Ma, L. 2004. Modeling spatial variability in agriculture: the agsimsgis water quality tool. Meeting Abstract. ESRI Southwest Users Group 2004 conference, Telleride, CO, October 20-22, 2004. www.swuggis.org/swug_2004/abstracts.shtml.

A Review of Climate Change and Societal Impacts on Groundwater: Implications for a Unesco Initiative - (Abstract)

Taniguchi, M., Green, T.R., Aureli, A. 2004. A review of climate change and societal impacts on groundwater: implications for a UNESCO initiative. Eos Trans. American Geophysical Union. 85(47), Fall Meet. Suppl., Abstract H21F-1085. 2004.

Model Parameters for Agricultural Systems with Nonlinear Process Interations and Spatial Variability - (Abstract)

Green, T.R., Ahuja, L.R., Ascough II, J.C., Ma, L., Erskine, R.H., McMaster, G.S. 2004. Model parameters for agricultural systems with nonlinear process interations and spatial variability. Agronomy Abstracts a04-5627. (CD-ROM). 2004.

Temperature Effects on Capacitance Measurements of Soil-Water Content: Theory and Field Application - (Abstract)

Green, T.R., Schwank, M., Fluhler, H. 2004. Temperature effects on capacitance measurements of soil-water content: theory and field application. Agronomy Abstracts a04-5654. (CD-ROM) 2004.

Model Parameterization at Different Scales: How Do We Estimate and Incorporate Spatial Information? - (Abstract)

Green, T.R., Ascough Ii, J.C., Ahuja, L.R., Ma, L., Erskine, R.H. 2004. Model parameterization at different scales: how do we estimate and incorporate spatial information?. Intl. Workshop on Applications, Enhancements and Collaboration of ARS RZWQM and GPFARM Models, April 20-22, 2004, Fort Collins, CO.

The Future of Spatial Modeling at Gpsru - (Abstract)

Ascough Ii, J.C., Green, T.R., Ahuja, L.R., Mcmaster, G.S., Ma, L. 2004. The future of spatial modeling at GPSRU. Workshop Proceedings. Intl. Workshop on Applications, Enhancements, and Collaboration of ARS RZWQM and GPSFARM Models, April 20 - 22, 2004, Fort Collins, CO.

Space-Time Modeling of Agricultural Landscape Variability Using Agsimgis - (Proceedings/Symposium)

Ascough Ii, J.C., Green, T.R., Cipra, J.E., Ahuja, L.R., Ma, L. 2004. Space-time modeling of agricultural landscape variability using agsimgis. Annual Hydrology Days Conference Proceedings. March 10-12, 2004. Fort Collins, CO. pp. 10-21.

Analysis of Dem Accuracy, Grid Cell Size, and Alternative Flow Routing Algorithms for Estimating Topographic Attributes - (Abstract)

Erskine, R.H., Green, T.R., Ramirez, J.A., Macdonald, L.H. 2004. Analysis of dem accuracy, grid cell size, and alternative flow routing algorithms for estimating topographic attributes. Annual Hydrology Days Conference Proceedings. Fort Collins, CO. March 10-12, 2004.

Fractal-Based Scaling and Scale-Invariant Dispersion of Peak Concentrations of Crop Protection Chemicals in Rivers - (Peer Reviewed Journal)

Gustafson, D.I., Carr, K.H., Green, T.R., Gustin, C., Jones, R.L., Richards, R.P. 2004. Fractal-based scaling and scale-invariant dispersion of peak concentrations of crop protection chemicals in rivers. Environmental Science and Technology. Vol. 38, No. 11, June 2004. pages 2995-3003.

Terrain-Based Scaling and Simulation of Cropping Systems - (Abstract)

Green, T.R., Erskine, R.H., Ascough Ii, J.C., Ahuja, L.R., Salas, J.D., Martinez, A. 2003. Terrain-based scaling and simulation of cropping systems. Meeting Proceedings. Integrative Modelling of Sustanable Land Use, ETH Zurich, Nov 24-25, 2003.

Spatial and Temporal Correlations among Dryland Grain Yeild and Soil-Water Content in a Sloping Field - (Abstract)

Andales, A.A., Ahuja, L.R., Green, T.R., Erskine, R.H., Peterson, G. 2003. Spatial and temporal correlations among dryland grain yeild and soil-water content in a sloping field. Agronomy Abstracts. Amer. Soc. of Agronomy, Denver, CO. Nov. 2-6, 2003.

Issues in Terrain Analyses: Digital Elevation Model Generation and Processing Tools - (Abstract)

Erskine, R.H., Green, T.R., Ramirez, J.A. 2003. Issues in terrain analyses: digital elevation model generation and processing tools. Meeting Proceedings. 2003 American Society of Agronomy/Crop Sci Society of Amer/Soil Science Soiciety of Amer Annual Meeting. Nov. 2-6, 2003. S05-erskine528369-poster (CD-ROM).

Measurement, Scaling, and Topographic Analyses of Spatial Crop Yield and Soil Water Content - (Peer Reviewed Journal)

Green, T.R., Erskine, R.H. 2004. Measurement, scaling, and topographic analyses of spatial crop yield and soil water content. Hydrological Processes. June 2004. Volume 18, Issue 8, pages 1447-1465.

Advances and Challenges in Predicting Agricultural Management Effects on Soil Hydraulic Properties - (Peer Reviewed Journal)

GREEN, T.R., AHUJA, L.R., BENJAMIN, J.G. ADVANCES AND CHALLENGES IN PREDICTING AGRICULTURAL MANAGEMENT EFFECTS ON SOIL HYDRAULIC PROPERTIES. GEODERMA. 2003. Vol. 116, pp. 3-27.

Fractal-Based, Scale-Dependent Models for Characterizing Peak Concentrations of Crop Protection Chemicals in Surface Waters - (Abstract)

Gustafson, D.I., Carr, K.H., Gustin, C., Green, T.R., Jones, R.L., Richards, R.P. 2002. Fractal-based, scale-dependent models for characterizing peak concentrations of crop protection chemicals in surface waters. Internationl Congress on Chemistry of Crop Production. July 1,2002.

Topographic Analysis, Scaling and Models to Evaluate Spatial/temporal Variability of Landscape Processes and Management - (Book/Chapter)

Ahuja, L.R., Green, T.R., Erskine, R.H., Ma, L., Ascough Ii, J.C., Dunn, G.H., Shaffer, M.J., Martinez, A. 2002. Topographic analysis, scaling and models to evaluate spatial/temporal variability of landscape processes and management. CRC Book: Agricultural Sys Models in Field Research and Technology Transfer. April 2002. Chapter 13, pp 265-272.