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United States Department of Agriculture

Agricultural Research Service

Related Topics

Todd H Skaggs
US Salinity Laboratory
Soil Scientist

Phone: (951) 369-4853
Fax: (951) 342-4964
Room 270
450 W BIG SPRINGS RD
RIVERSIDE, CA, 92501-0000

Projects
Effects of Agricultural Water Management and Land Use Practices on Regional Water Quality
Appropriated (D)
  Accession Number: 422735

Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Exact analytical solutions for contaminant transport in rivers 1. The equilibrium advection-dispersion equation Reprint Icon - (Peer Reviewed Journal)
Van Genuchten, M.T., Leij, F.J., Skaggs, T.H., Toride, N., Bradford, S.A., Pontedeiro, E.M. 2013. Exact analytical solutions for contaminant transport in rivers 1. The equilibrium advection-dispersion equation. Journal of Hydrology and Hydromechanics. 61(2):146-160.
Exact analytical solutions for contaminant transport in rivers 2. Transient storage and decay chain solutions Reprint Icon - (Peer Reviewed Journal)
Van Genuchten, M.T., Leij, F.J., Skaggs, T.H., Toride, N., Bradford, S.A., Pontedeiro, E.M. 2013. Exact analytical solutions for contaminant transport in rivers 2. Transient storage and decay chain solutions. Journal of Hydrology and Hydromechanics. 61(3):250-259.
Analytical solutions of the one-dimensional advection-dispersion solute transport equation subject to time-dependent boundary conditions Reprint Icon - (Peer Reviewed Journal)
Perez-Guerrero, J.S., Pontedeiro, E.M., Van Genuchten, M.T., Skaggs, T.H. 2013. Analytical solutions of the one-dimensional advection-dispersion solute transport equation subject to time-dependent boundary conditions. Chemical Engineering Journal. 221:487-491.
Solute transport in a loamy soil under subsurface porous clay pipe irrigation Reprint Icon - (Peer Reviewed Journal)
Siyal, A.A., Van Genuchten, M.T., Skaggs, T.H. 2013. Solute transport in a loamy soil under subsurface porous clay pipe irrigation. Agricultural Water Management. 121(2013):73-80.
Effects of soil hydraulic and transport parameter uncertainty on predictions of solute transport in large lysimeters Reprint Icon - (Peer Reviewed Journal)
Skaggs, T.H., Suarez, D.L., Goldberg, S.R. 2013. Effects of soil hydraulic and transport parameter uncertainty on predictions of solute transport in large lysimeters. Vadose Zone Journal. doi:10.2136/vzj2012.0143.
Effects of soil moisture on the diurnal pattern of pesticide emission: Numerical simulation and sensitivity analysis Reprint Icon - (Peer Reviewed Journal)
Reichman, R., Yates, S.R., Skaggs, T.H., Rolston, D.E. 2013. Effects of soil moisture on the diurnal pattern of pesticide emission: Numerical simulation and sensitivity analysis. Atmospheric Environment. 66(2013):41-51.
Analytical solution for the advection-dispersion transport equation in layered media Reprint Icon - (Peer Reviewed Journal)
Perez Guerrero, J.S., Pimentel, L.C., Skaggs, T.H. 2012. Analytical solution for the advection-dispersion transport equation in layered media. International Journal of Heat and Mass Transfer. 56:274-282.
Effects of soil moisture on the diurnal pattern of pesticide emission: Comparison of simulations with field measurements Reprint Icon - (Peer Reviewed Journal)
Reichman, R., Yates, S.R., Skaggs, T.H., Rolston, D.E. 2013. Effects of soil moisture on the diurnal pattern of pesticide emission: Comparison of simulations with field measurements. Atmospheric Environment. 66(2013):52-62.
Replicated lysimeter measurements of tracer transport in clayey soils: Effects of irrigation water salinity Reprint Icon - (Peer Reviewed Journal)
Skaggs, T.H., Suarez, D.L., Goldberg, S.R., Shouse, P.J. 2012. Replicated lysimeter measurements of tracer transport in clayey soils: Effects of irrigation water salinity. Agricultural Water Management. 110:84-93.
Assessment of critical path analyses of the relationship between permeability and electrical conductivity of pore networks Reprint Icon - (Peer Reviewed Journal)
Skaggs, T.H. 2011. Assessment of critical path analyses of the relationship between permeability and electrical conductivity of pore networks. Advances in Water Resources. 34:1335-1342.
Diurnal variation of diazinon volatilization: Soil moisture effects - (Peer Reviewed Journal)
Reichman, R., Rolston, D.E., Yates, S.R., Skaggs, T.H. 2011. Diurnal variation of diazinon volatilization: Soil moisture effects. Environmental Science and Technology. 45(6):2144-2149.
Analytical solution for one-dimensional advection-dispersion transport equation with distance-dependent coefficients Reprint Icon - (Peer Reviewed Journal)
Perez Guerrero, J.S., Skaggs, T.H. 2010. Analytical solution for one-dimensional advection-dispersion transport equation with distance-dependent coefficients. Journal of Hydrology. 390(1-2)57:65.
Drip irrigation water distribution patterns: Effects of emitter rate, pulsing, and antecedent water - (Peer Reviewed Journal)
Skaggs, T.H., Trout, T.J., Rothfuss, Y. 2010. Drip irrigation water distribution patterns: Effects of emitter rate, pulsing, and antecedent water. Soil Science Society of America Journal. 74(6):1886-1896.
Comparison of model- and design-based sampling strategies for characterizing spatial variablity with ECa-directed soil sampling - (Peer Reviewed Journal)
Corwin, D.L., Lesch, S.M., Segal, E., Shouse, P.J., Skaggs, T.H., Bradford, S.A. 2010. Comparison of model- and design-based sampling strategies for characterizing spatial variablity with ECa-directed soil sampling. Journal of Environmental & Engineering Geophysics. 15(3):147-162.
Analytical solution for multi-species contaminant transport in finite media with time-varying boundary conditions Reprint Icon - (Peer Reviewed Journal)
Perez Guerrero, J.S., Skaggs, T.H., Van Genuchten, M.T. 2010. Analytical solution for multi-species contaminant transport in finite media with time-varying boundary conditions. Transport in Porous Media. 85(1):171-188.
Changes in spatial and temporal variability of SAR affected by shallow groundwater management of an irrigated field, California - (Peer Reviewed Journal)
Shouse, P.J., Goldberg, S.R., Skaggs, T.H., Soppe, R.O., Ayars, J.E. 2010. Changes in spatial and temporal variability of SAR affected by shallow groundwater management of an irrigated field, California. Agricultural Water Management. 97(5):673-680.
Measuring Particle Size Distribution using Laser Diffraction: Implications for Predicting Soil Hydraulic Properties Reprint Icon - (Peer Reviewed Journal)
Segal, E., Shouse, P.J., Bradford, S.A., Skaggs, T.H., Corwin, D.L. 2009. Measuring Particle Size Distribution using Laser Diffraction: Implications for Predicting Soil Hydraulic Properties. Soil Science. 174(12)639:645.
Reclamation of saline soils by partial ponding: Simulations for different soils - (Peer Reviewed Journal)
Siyal, A.A., Skaggs, T.H., Van Genuchten, M. 2010. Reclamation of saline soils by partial ponding: Simulations for different soils. Vadose Zone Journal. 9(2):486-495.
Simulation of Populus euphratica root uptake of groundwater in an arid woodland of the Ejina basin, China Reprint Icon - (Peer Reviewed Journal)
Zhu, Y., Ren, L., Skaggs, T.H., Lu, H., Yu, Z., Wu, Y. 2009. Simulation of Populus euphratica root uptake of groundwater in an arid woodland of the Ejina basin, China. Hydrological Processes. Available: http://www3.interscience.wiley.com/journal/122405848/abstract
Analytical Solution for Multi-Species Contaminant Transport Subject to Sequential First-Order Decay Reactions in Finite Media Reprint Icon - (Peer Reviewed Journal)
Pérez Guerrero, J.S., Skaggs, T.H., Van Genuchten, M.T. 2009. Analytical Solution for Multi-Species Contaminant Transport Subject to Sequential First-Order Decay Reactions in Finite Media. Transport in Porous Media. 80(2):373-387.
Analytical solution of the advection-diffusion transport equation using a change-of-variable and integral transform technique Reprint Icon - (Peer Reviewed Journal)
Perez-Guerrero, J.S., Pimentel, L.G., Skaggs, T.H., Van Genuchten, M.T. 2009. Analytical solution of the advection-diffusion transport equation using a change-of-variable and integral transform technique. International Journal of Heat and Mass Transfer. 52:3297-3304.
A Root Zone Modelling Approach to Estimating Groundwater Recharge from Irrigated Areas Reprint Icon - (Peer Reviewed Journal)
Jimenez-Martinez, J., Skaggs, T.H., Van Genuchten, M.T., Candela, L. 2009. A Root Zone Modelling Approach to Estimating Ground Recharge from Irrigated Areas. Journal of Hydrology. 367:138–149.
Measured and simulated soil weeting patterns under porous clay pipe subsurface irrigation Reprint Icon - (Peer Reviewed Journal)
Siyal, A.A., Skaggs, T.H. 2009. Measured and simulated soil weeting patterns under porous clay pipe subsurface irrigation. Agricultural Water Management. 96:893-904.
Comparison of Measured and Simulated Water Storage in Dryland Terraces of the Loess Plateau, China Reprint Icon - (Peer Reviewed Journal)
Lu, H., Zhu, Y., Skaggs, T.H., Yu, Z. 2008. Comparison of Measured and Simulated Water Storage in Dryland Terraces of the Loess Plateau, China. Agricultural Water Management. 96(2):299-306.
Roots and Root Function: Introduction Reprint Icon - (Review Article)
Skaggs, T.H., Shouse, P.J. 2008. Roots and Root Function: Introduction. Vadose Zone Journal. 7(3):1008-1009.
Hydrus-1d Modeling of An Irrigated Agricultural Plot with Application to Aquifer Recharge Estimation - (Proceedings)
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 Reprint Icon - (Proceedings)
Zhu, Y., Ren, L., Lu, H., Skaggs, T.H. 2008. Determination of root-zone water storage in a desert woodland using a two-layer moisture balance model. In: Hydrological Research in China: Process Studies, Modelling Approaches and Applications. Proceedings. IAHS Publication 322 pp: 246-251.
Estimation of recharge from irrigation flows; Analysis of field and laboratory data and modeling. - (Proceedings)
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 Only)
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 Reprint Icon - (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 Only)
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 Reprint Icon - (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)
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 Only)
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)
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 Only)
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 Only)
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 Reprint Icon - (Proceedings)
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 Reprint Icon - (Proceedings)
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 Reprint Icon - (Proceedings)
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 Only)
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 Reprint Icon - (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 Only)
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 Only)
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 Reprint Icon - (Proceedings)
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 Only)
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)
State Space Analysis of Soil Water and Salinity Regimes in a Loam Soil Underlain by Shallow Groundwater. - (Book / Chapter) - (17-Jun-00)
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)
Estimating Exceedance Probabilities for the Cumulative Solute Mass Flux in Heterogeneous Groundwater Systems - (Abstract Only) - (09-Sep-96)
Last Modified: 4/18/2014
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