298 Complexity - Linked Nonlinear Processes

Oral Session
S01 Soil Physics

Mass and energy transport in the unsaturated zone are complex, linked processes. Predictions of the total water and energy exchange across the soil surface is critical for understanding processes as different as seed germination, trafficability, and weather prediction. Despite the fundamental importance of evaporation from soil, surprisingly little is known about this process in realistic soils under field conditions. This session presents the state of the art and new developments in the theory of evaporation from soils, as well as new approaches to measure and model the linked nonlinear processes associated with evaporation from soil.

Wednesday, November 3, 2010: 8:00 AM-11:45 AM
Long Beach Convention Center, Room 306, Seaside Level

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Harry Vereecken and Manoj Shukla
Manoj Shukla
8:00 AM
Introductory Remarks
8:15 AM
Near-Surface Above- and below-Ground Measurements of Soil Evaporation.
Michael Young, University of Texas, Austin; Brad Lyles, Desert Research Institute; Jeremy Koonce, Desert Research Institute; Karletta Chief, Desert Research Institute; John Healey, Desert Research Institute
8:45 AM
Method to Estimate the Water Vapor Enhancement Factor in Soil.
Tusheng Ren, China Agricultural University; Sen Lu, China Agricultural University; Zhaoqiang Ju, Chinese Academy of Sciences; Robert Horton, Iowa State University
9:00 AM
Numerical Modeling of Water Vapor Fluxes in the Unsaturated Zone of Mature Pecan Orchards in Arid Southern New Mexico.
Sanjit Deb, Department of Plant and Environmental Sciences, New Mexico State University; Manoj Shukla, New Mexico State University
9:15 AM
Coupled Transport of Nitrate and Chloride in Unsaturated Soil Columns.
Amir M. Gonzalez, New Mexico State University; Manoj Shukla, New Mexico State University
9:30 AM
Quantifying Macro- and Micro-Pores to Assess the Influence of Forage Grass On Coastal Plains Soils through the Use of Computed Tomography (CT).
Ronald Prevatt III, Auburn University; Julie A. Howe, Auburn University; Navin K. Twarakavi, Auburn University; Francisco J. Arriaga, Auburn University
9:45 AM
Low-Intensity, Fire-Induced Changes of Soil Structure, Physical and Hydraulic Properties.
Karletta Chief, University of Arizona; Michael Young, University of Texas, Austin; David Shafer, Desert Research Institute
10:15 AM
Spatial Variability of Soil Properties In Agricultural Fields of Southern New Mexico.
Parmodh Sharma, Teaxs A&M University; Manoj Shukla, New Mexico State University; John Mexal, New Mexico State University; Theodore Sammis, New Mexico State University
10:00 AM
10:30 AM
Effect of Subsoil Compaction On Hydraulic Parameters.
Bo Iversen, University of Aarhus; Feto E. Berisso, University of Aarhus; Per Schjønning, University of Aarhus; Dorthe Wildenschild, Oregon State University; Lis de Jonge, University of Aarhus; Ararso Etana, SLU; Nicholas J. Jarvis, SLU; Mats Larsbo, SLU; Thomas Keller, Agroscope Research Station ART; Johan Arvidsson, SLU; Christen D. Børgesen, University of Aarhus
10:45 AM
Modeling and Measuring Root Water Extraction and Transpiration Reduction.
Quirijn de Jong van Lier, University of Sao Paulo; Angelica Durigon, LEB/ESALQ University of São Paulo
11:00 AM
Estimation of Unsaturated Hydraulic Properties of Peat Soils From Evaporation Method and Multi-Step Outflow Method.
Kei Asada, Tokyo University of Agriculture and Technology; Hirotaka Saito, Tokyo University of Agriculture & Technology
11:15 AM
Modelling Root Water Uptake: From 3-D Root Scale Models to 1-D Field Scale Effective Approaches.
Mathieu Javaux, Universite Catholique de Louvain; Jan Vanderborght, Forschungszentrum Juelich GmbH; Valentin Couvreur, Université catholique de Louvain; Harry Vereecken, Forschungszentrum Juelich GmbH
11:30 AM
The Effect of Salinity On Water and Nutrient Uptake: Field and Model Results.
Naftali Lazarovitch, Ben-Gurion University of the Negev; Thomas Groenveld, Ben-Gurion University of the Negev; Uri Yermiyahu, ISRAEL, Agric. Research Org.; Alon Ben-Gal, Agricultural Research Organization
11:45 AM
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