Soil Water Distribution and Movement in Layered Soils of a Dam Farmland

2010 ◽  
Vol 24 (14) ◽  
pp. 3871-3883 ◽  
Author(s):  
Peipei Zhao ◽  
Ming-an Shao ◽  
Ahmed A. Melegy
Keyword(s):  
Soil Water ◽  
Water Distribution ◽  
Layered Soils ◽  
Soil Water Distribution

scholarly journals A thermodynamic formulation of root water uptake

2016 ◽  
Vol 20 (8) ◽  
pp. 3441-3454 ◽  
Author(s):  
Anke Hildebrandt ◽  
Axel Kleidon ◽  
Marcel Bechmann
Keyword(s):  
Soil Water ◽  
Water Uptake ◽  
Water Distribution ◽  
Bound Water ◽  
Root Water Uptake ◽  
Flow Path ◽  
Thermodynamic Evaluation ◽  
Entire Flow ◽  
Soil Water Distribution

Abstract. By extracting bound water from the soil and lifting it to the canopy, root systems of vegetation perform work. Here we describe how root water uptake can be evaluated thermodynamically and demonstrate that this evaluation provides additional insights into the factors that impede root water uptake. We derive an expression that relates the energy export at the base of the root system to a sum of terms that reflect all fluxes and storage changes along the flow path in thermodynamic terms. We illustrate this thermodynamic formulation using an idealized setup of scenarios with a simple model. In these scenarios, we demonstrate why heterogeneity in soil water distribution and rooting properties affect the impediment of water flow even though the mean soil water content and rooting properties are the same across the scenarios. The effects of heterogeneity can clearly be identified in the thermodynamics of the system in terms of differences in dissipative losses and hydraulic energy, resulting in an earlier start of water limitation in the drying cycle. We conclude that this thermodynamic evaluation of root water uptake conveniently provides insights into the impediments of different processes along the entire flow path, which goes beyond resistances and also accounts for the role of heterogeneity in soil water distribution.

Mobility of a Polyether Trisiloxane Surfactant in Soil: Soil/Water Distribution Coefficients and Leaching in a Soil Column

2016 ◽  
Vol 227 (2) ◽  
Author(s):  
Amandine Michel ◽  
Conrad Dietschweiler ◽  
Martina Böni ◽  
Michael Burkhardt ◽  
Heinz-Jürgen Brauch ◽  
...  
Keyword(s):  
Soil Water ◽  
Water Distribution ◽  
Soil Column ◽  
Distribution Coefficients ◽  
Soil Water Distribution

COMPARISON OF THE SWATRER AND CERES/MOD MODELS FOR SOIL WATER DISTRIBUTION IN SUGARBEET

1990 ◽  
pp. 711-720
Author(s):  
G. Vitali ◽  
P. Rossi Pisa ◽  
L. Cavazza ◽  
F. Vargas ◽  
S. Dautrebande
Keyword(s):  
Soil Water ◽  
Water Distribution ◽  
Soil Water Distribution

An Attempt to Evaluate Soil Water Distribution by a Capacitance CT Technique

2016 ◽  
Vol 2016 (0) ◽  
pp. J0510204
Author(s):  
Takahito KUSUNOKI ◽  
Shigeru MURATA ◽  
Yohsuke TANAKA
Keyword(s):  
Soil Water ◽  
Water Distribution ◽  
Ct Technique ◽  
Soil Water Distribution

scholarly journals Surfactants expressed by soil pseudomonads alter local soil-water distribution, suggesting a hydrological role for these compounds

2011 ◽  
Vol 78 (1) ◽  
pp. 50-58 ◽  
Author(s):  
Joanna Fechtner ◽  
Anna Koza ◽  
Patricia Dello Sterpaio ◽  
Simona M. Hapca ◽  
Andrew J. Spiers
Keyword(s):  
Soil Water ◽  
Water Distribution ◽  
Local Soil ◽  
Soil Water Distribution
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