Projects

IMPROVED KNOWLEDGE AND MODELING OF WATER FLOW AND CHEMICAL TRANSPORT PROCESSES IN IRRIGATED SOILS Appropriated (D)   Accession Number: 411672

MINIMIZING AIR & WATER CONTAMINATION FROM AGRICULTURAL PESTICIDES Appropriated (D)   Accession Number: 412010

MODELING THE FATE AND TRANSPORT OF AGRICULTURAL CONTAMINANTS IN SOILS AND GROUNDWATER Specific Cooperative Agreement (S)   Accession Number: 409849

Publications

Roots and Root Function: Introduction - (Review Article)

Skaggs, T.H., Shouse, P.J. 2008. Roots and Root Function: Introduction. Vadose Zone Journal. Vol 7(3):1008-1009

HYDRUS-1D Modeling of an Irrigated Agricultural Plot with Application to Aquifer Recharge Estimation - (Proceedings/Symposium)

Jimenez-Martinez, J., Skaggs, T.H., Van Genuchten, M.T., Candela, L. 2008. Hydrus-1d modeling of an irrigated agricultural plot with application to aquifer recharge estimation. Meeting Abstract. Proceedings of the Second HYDRUS Workshop, March 28, 2008 pp:61-65

Determination of root-zone water storage in a desert woodland using a two-layer moisture balance model - (Proceedings/Symposium) - (15-Nov-07)

Estimation of recharge from irrigation flows; Analysis of field and laboratory data and modeling. - (Proceedings/Symposium)

Jimenez, J., Skaggs, T.H., Van Genuchten, M.T., Candela, L. Estimation of recharge from irrigation flows; Analysis of field and laboratory data and modeling.. Meeting Proceedings. Estudios de la Zona No Saturado del Suelo, ZNS'07, Nov 14-16, 2007, Univ of Cordoba, Spain. Vol VIII, p. 101-105

Analytical Advection-Dispersion Model for Transport and Plant Uptake of Solutes in the Root Zone - (Peer Reviewed Journal)

Skaggs, T.H., Jarvis, N.J., Pontedeiro, E.M., Van Genuchten, M.T., Cotta, R.M. 2007. Analytical Advection-Dispersion Model for Transport and Plant Uptake of Solutes in the Root Zone. Vadose Zone Journal. Vol 6:890-898

Irrigation of forage crops with saline drainage waters: Volumetric lysimeter studies and modeling of root water uptake and drainage - (Abstract)

Skaggs, T.H. 2007. Irrigation of forage crops with saline drainage waters: Volumetric lysimeter studies and modeling of root water uptake and drainage. American Chemical Society National Meeting, Chicago, IL Mar 25-29, 2007. Paper No. SUST92

MACROSCOPIC APPROACHES TO ROOT WATER UPTAKE AS A FUNCTION OF WATER AND SALINITY STRESS - (Peer Reviewed Journal)

Skaggs, T.H., Van Genuchten, M.T., Shouse, P.J., Poss, J.A. 2006. Macroscopic approaches to root water uptake as a function of water and salinity stress. Agricultural Water Management. 86:140-149

MACROSCOPIC APPROACHES TO MODELING ROOT WATER UPTAKE AS A FUNCTION OF WATER AND SALINITY STRESS - (Abstract)

Skaggs, T.H., Van Genuchten, M.T., Shouse, P.J. 2006. Macroscopic approaches to modeling root water uptake as a function of water and salinity stress. Soil Science Society of America Annual Meeting. In annual meeting abstracts (CD-ROM). Paper No. 81-1

REVIEW OF ¿PERCOLATION THEORY FOR FLOW IN POROUS MEDIA (LECTURE NOTES IN PHYSICS 674)¿ - (Other)

Skaggs, T.H. 2006. Review of ¿Percolation theory for flow in porous media (lecture notes in physics 674)¿ by Allen G. Hunt. Vadose Zone Journal. 5:1154

IRRIGATING FORAGE CROPS WITH SALINE WATERS 1. VOLUMETRIC LYSIMETER STUDIES - (Peer Reviewed Journal)

Skaggs, T.H., Poss, J.A., Shouse, P.J., Grieve, C.M. 2006. Irrigating forage crops with saline waters 1. volumetric lysimeter studies. Vadose Zone Journal. 5:815-823.

IRRIGATING FORAGE CROPS WITH SALINE WATERS 2. MODELING ROOT UPTAKE AND DRAINAGE - (Peer Reviewed Journal)

Skaggs, T.H., Shouse, P.J., Poss, J.A. 2006. Irrigating forage crops with saline waters 2. modeling root uptake and drainage. Vadose Zone Journal. 5:824-837.

EFFECTS OF SHALLOW GROUNDWATER MANAGEMENT ON THE SPATIAL AND TEMPORAL VARIABILITY OF BORON AND SALINITY IN AN IRRIGATED FIELD - (Peer Reviewed Journal)

Shouse, P.J., Goldberg, S.R., Soppe, R.W., Skaggs, T.H., Ayars, J.E. 2006. Effects of shallow groundwater management on the spatial and temporal variability of boron and salinity in an irrigated field. Vadose Zone Journal. 5:377-390.

IRRIGATION PRACTICES THAT IMPROVE DRIP FUMIGATION. - (Proceedings/Symposium)

Trout, T.J., Skaggs, T.H., Rothfuss, Y. 2005. Irrigation practices that improve drip fumigation.. Methyl Bromide Alternatives and Emissions Research Conference Proceedings. Annual International Research Conference on Methyl Bromide Alternatives And Emissions Reductions Conference 2005, pp 35-1 - 35-3.

SOLUTE TRANSPORT IN THE ROOT ZONE: PROBLEM FORMULATION AND ANALYTICAL SOLUTIONS - (Abstract)

Skaggs, T.H., Pontedeiro, E.M., Van Genuchten, M.T., Jarvis, N., Cotta, R.M. 2005. Solute transport in the root zone: problem formulation and analytical solutions. American Geophysical Union Abstract. CD-ROM, San Francisco, CA.

RECENT APPLICATIONS OF HYDRUS IN IRRIGATED AGRICULTURE - (Proceedings/Symposium)

Skaggs, T.H., Trout, T.J., Kelleners, T.J., Shouse, P.J., Ayars, J.E. 2005. Recent applications of hydrus in irrigated agriculture. In: S. Torkzaban and S. Majid Hassanizadeh (eds.), Proceedings of Workshop on HYDRUS Applications. October 19, 2005, ISBN 90-39341125, Department of Earth Sciences, Utrecht University, Utrecht, The Netherlands. p: 69-72.

UNSODA: UNSATURATED SOIL HYDRAULIC PROPERTY DATABASE - (Abstract)

Skaggs, T.H., Van Genuchten, M.T., Schaap, M.G., Shouse, P.J. 2005. Unsoda: unsaturated soil hydraulic property database. Agronomy Abstracts. CD-ROM, Salt Lake City, UT. Paper No. 10

PARAMETERIZING ROOT WATER UPTAKE AS A FUNCTION OF WATER AND SALINITY STRESS - (Abstract)

Van Genuchten, M.T., Skaggs, T.H. 2005. Parameterizing root water uptake as a function of water and salinity stress. Trans American Geophysical Union. 86(16), Joint Assembly Suppl., New Orleans, LA. Abstract H41B-05 (CD-ROM).

IRRIGATION OF FORAGE CROPS WITH SALINE DRAINAGE WATERS: VOLUMETRIC LYSIMETER STUDIES AND MODELING OF ROOT WATER UPTAKE AND DRAINAGE - (Proceedings/Symposium)

Skaggs, T.H., Poss, J.A., Shouse, P.J. 2005. Irrigation of forage crops with saline drainage waters: Volumetric lysimeter studies and modeling of root water uptake and drainage. In: Proceedings of the International Salinity Forum, Managing Saline Soils and Water: Science, Technology, and Soil Issues. April 25-27, 2005. Riverside, CA pp:421-424.

INSTRUMENTING LARGE SOIL COLUMNS FOR SALINITY AND TRACE ELEMENT TRANSPORT STUDIES - (Proceedings/Symposium)

Shouse, P.J., Goldberg, S.R., Skaggs, T.H., Suarez, D.L. 2005. Instrumenting large soil columns for salinity and trace element transport studies. In: Proceedings of the International Salinity Forum, Managing Saline Soils and Water: Science, Technology, and Soil Issues. April 25-27, 2005. Riverside, CA pp:147-149.

SPATIAL AND TEMPORAL DISTRIBUTIONS OF SALINITY AND BORON IN AN IRRIGATED FIELD UNDER SHALLOW GROUNDWATER MANAGEMENT - (Proceedings/Symposium)

Shouse, P.J., Goldberg, S.R., Soppe, R.W., Skaggs, T.H., Ayars, J.E. 2005. Spatial and temporal distributions of salinity and boron in an irrigated field under shallow groundwater management. In: Proceedings of the International Salinity Forum, Managing Saline Soils and Water: Science, Technology, and Soil Issues. April 25-27, 2005. Riverside, CA pp:417-420.

EFFECTS OF SALINITY AND DROUGHT STRESSES ON ROOT WATER UPTAKE - (Abstract)

Skaggs, T.H., Poss, J.A., Shouse, P.J. 2004. Effects of salinity and drought stresses on root water uptake. American Geophysical Union, Eos Trans., Fall Meeting Supplement, AGU, CD-ROM.

FREQUENCY DEPENDENCE OF THE COMPLEX PERMITTIVITY AND ITS IMPACT ON DIELECTRIC SENSOR CALIBRATION IN SOILS - (Peer Reviewed Journal)

Kelleners, T.J., Robinson, D.A., Shouse, P.J., Ayars, J.E., Skaggs, T.H., 2005. Frequency dependence of the complex permittivity and its impact on dielectric sensor calibration in soils. Soil Science Society of America Journal. 69:67-76.

INVERSE ANALYSIS OF UPWARD WATER FLOW IN A GROUNDWATER TABLE LYSIMETER - (Peer Reviewed Journal)

Kelleners, T.J., Soppe, R.W., Ayars, J.E., Simunek, J., Skaggs, T.H. 2005. Inverse analysis of upward water flow in a groundwater table lysimeter. Vadose Zone Journal. Vol 4: 558-572 (2005)

FORAGE CROP RESPONSE TO SALINITY AND WATER STRESSES: COMPARISON OF SIMULATED ROOT WATER UPTAKE AND DRAINAGE WITH LYSIMETER DATA - (Abstract)

Skaggs, T.H., Poss, J.A., Shouse, P.J. 2004. Forage crop response to salinity and water stresses: comparison of simulated root water uptake and drainage with lysimeter data. Agronomy Abstracts. CD-ROM, Seattle, WA.

COMPARISON OF HYDRUS-2D SIMULATIONS OF DRIP IRRIGATION WITH EXPERIMENTAL OBSERVATIONS - (Peer Reviewed Journal)

Skaggs, T.H., Trout, T.J., Simunek, J., Shouse, P.J. 2004. Comparison of HYDRUS-2D simulations of drip irrigation with experimental observations. Journal of Irrigation and Drainage Engineering. 130(4):304-310.

CALIBRATION OF CAPACITANCE PROBE SENSORS IN A SALINE SILTY CLAY SOIL - (Peer Reviewed Journal)

Kelleners, T.J., Soppe, R.W., Ayars, J.E., Skaggs, T.H. 2004. Calibration of capacitance probe sensors in a saline silty clay soil. Soil Science Society of America Journal. 68:770-778.

CALIBRATION OF CAPACITANCE PROBE SENSORS USING ELECTRIC CIRCUIT THEORY - (Abstract)

Kelleners, T.J., Soppe, R., Robinson, D., Schaap, M., Ayars, J.E., Skaggs, T.H. 2003. Calibration of capacitance probe sensors using electric circuit theory. CD-ROM. Agronomy Abstracts. Denver, CO.

EFFECTS OF FINITE SYSTEM-SIZE AND FINITE INHOMOGENEITY ON THE CONDUCTIVITY OF BROADLY DISTRIBUTED RESISTOR NETWORKS - (Peer Reviewed Journal)

Skaggs, T.H. 2003. Effects of finite system-size and finite inhomogeneity on the conductivity of broadly distributed resistor networks. Physica B. 338:266-269.

UNSATURATED ZONE PARAMETER ESTIMATION USING THE HYDRUS AND ROSETTA SOFTWARE PACKAGES - (Proceedings/Symposium)

Van Genuchten, M.T., Simunek, J., Schaap, M.G., Skaggs, T.H. 2003. Unsaturated zone parameter estimation using the hydrus and rosetta software packages. Proceedings of the International Workshop on Uncertainty, Sensitivity, and Parameter Estimation for Multimedia Environmental Modeling. Publisher: U.S. Nuclear Regulatory Commission, pp. 41-43.

CALIBRATION OF CAPACITANCE PROBE SENSORS USING ELECTRIC CIRCUIT THEORY - (Peer Reviewed Journal)

Kelleners, T.J., Soppe, R.W., Robinson, D.A., Schaap, M.G., Ayars, J.E., Skaggs, T.H. 2004. Calibration of capacitance probe sensors using electric circuit theory. Soil Science Society of America Journal. 68:430-439.

EVOLUTION OF SOIL MOISTURE SPATIAL STRUCTURE IN A MIXED VEGETATION PIXEL DURING THE SOUTHERN GREAT PLAINS 1997 (SGP97) HYDROLOGY EXPERIMENT - (Peer Reviewed Journal) - (28-Aug-02)

NUMERICAL MODELING OF SUBSURFACE DRIP IRRIGATION - (Abstract)

Skaggs, T.H., Simunek, J., Ayars, J.E., Trout, T.J. Numerical modeling of subsurface drip irrigation. Agronomy Abstracts. In Annual meetings abstracts (CD-ROM). ASA, CSSA, and SSSA, Madison, WI.

6.5 SOLUTE TRANSPORT: DATA ANALYSIS AND PARAMETER ESTIMATION - (Book/Chapter)

Skaggs, T.H., Jaynes, D.B., Kachanoski, R.G., Shouse, P.J., Ward, A.L. 2002. 6.5 solute transport: data analysis and parameter estimation. In. J.H. Dane and G.C. Topp. (eds). Methods of Soil Analysis. Part 4 Physical Methods. Soil Science of America, Madison, WI. Chapter 6.5. p. 1403-1434.

SPATIO-TEMPORAL EVOLUTION AND TIME-STABLE CHARACTERISTICS OF SOIL MOISTURE WITHIN REMOTE SENSING FOOTPRINTS WITH VARYING SOIL, SLOPE, AND VEGETATION - (Peer Reviewed Journal) - (02-Feb-01)

ANALYSIS AND MAPPING OF FIELD-SCALE SOIL MOISTURE VARIABILITY USING HIGH-RESOLUTION, GROUND-BASED DATA DURING THE SOUTHERN GREAT PLAINS 1997 (SGP97) HYDROLOGY EXPERIMENT - (Peer Reviewed Journal) - (23-Dec-99)