Fairness measure: Difference between revisions

Revision as of 11:22, 23 August 2013

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Integral energy is the amount of energy required to remove water from an initial water content $θ_{i}$ to water content of $θ_{f}$ (where $θ_{i} > θ_{f}$ ). It is calculated by integrating the water retention curve, soil water potential $ψ (θ)$ with respect to $θ$ :

$E_{i} = \int_{θ_{i}}^{θ_{f}} \frac{1}{θ_{i} - θ_{f}} ψ (θ) d θ$

It is proposed by Minasny and McBratney (2003) as alternative to available water capacity. (AWC) The AWC concept assumes equal availability of water between two potentials and does not consider the path along the water retention curve. Integral energy takes into the account the path or energy (characterised by water retention curve) required to dry a soil at particular soil moisture content

References

Minasny, B., McBratney, A.B., 2003. Integral energy as a measure of soil-water availability. Plant and Soil 249(2), 253-262.

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+{{About|soil physics|the electricity distributor|Integral Energy }}
+'''Integral energy''' is the amount of energy required to remove water from an initial [[water content]] <math>\theta_i</math> to water content of <math>\theta_f</math> (where <math>\theta_i > \theta_f</math>). It is calculated by integrating the [[water retention curve]], soil [[water potential]] <math>\psi(\theta)</math> with respect to <math>\theta</math>:
+<math> E_i = \int_{\theta_i}^{\theta_f} \frac{1}{\theta_i-\theta_f}  \psi(\theta)\, d\theta</math>
+It is proposed by Minasny and McBratney (2003) as alternative to [[available water capacity]]. (AWC)
+The AWC concept assumes equal availability of water between two potentials and does not consider the path along the water retention curve. Integral energy takes into the account the path or energy (characterised by water retention curve) required to dry a [[soil]] at particular [[soil moisture]] content
+==References==
+Minasny, B., McBratney, A.B., 2003. Integral energy as a measure of soil-water availability. Plant and Soil 249(2), 253-262.
+==See also==
+*[[Available water capacity]]
+*[[Nonlimiting water range]]
+[[Category:Soil physics]]

Fairness measure: Difference between revisions

Revision as of 11:22, 23 August 2013

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