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| Titel |
Sensitivity of drainage efficiency of cranberry fields to edaphic conditions |
| VerfasserIn |
Yann Périard, Silvio José Gumiere, Alain N. Rousseau, Jean Caron, Dennis W. Hallema |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250093465
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| Publikation (Nr.) |
 EGU/EGU2014-8204.pdf |
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| Zusammenfassung |
| Water management on a cranberry farm requires intelligent irrigation and drainage strategies
to sustain strong productivity and minimize environmental impact. For example, to avoid
propagation of disease and meet evapotranspiration demand, it is imperative to maintain
optimal moisture conditions in the root zone, which depends on an efficient drainage system.
However, several drainage problems have been identified in cranberry fields. Most of these
drainage problems are due to the presence of a restrictive layer in the soil profile
(Gumiere et al., 2014). The objective of this work is to evaluate the effects of a
restrictive layer on the drainage efficiency by the bias of a multi-local sensitivity
analysis. We have tested the sensitivity of the drainage efficiency to different input
parameters set of soil hydraulic properties, geometrical parameters and climatic
conditions. Soil water flux dynamic for every input parameters set was simulated with
finite element model Hydrus 1D (Šimůnek et al., 2008). Multi-local sensitivity was
calculated with the G-teaux directional derivatives with the procedure described by
Cheviron et al. (2010). Results indicate that drainage efficiency is more sensitive to soil
hydraulic properties than geometrical parameters and climatic conditions. Then, the
geometrical parameters of the depth are more sensitive than the thickness. The
drainage efficiency was very insensitive to the climatic conditions. Understanding the
sensitivity of drainage efficiency according to soil hydraulic properties, geometrical and
climatic conditions are essential for diagnosis drainage problems. However, it becomes
important to identify the mechanisms involved in the genesis of anthropogenic
soils cranberry to identify conditions that may lead to the formation of a restrictive
layer.
References:
Cheviron, B., S.J. Gumiere, Y. Le Bissonnais, R. Moussa and D. Raclot. 2010. Sensitivity
analysis of distributed erosion models: Framework. Water Resources Research 46: W08508.
doi:10.1029/2009WR007950.
Gumiere, S.J., J. Lafond, D. W. Hallema, Y. Périard, J. Caron et J. Gallichand. 2014.
Mapping soil hydraulic conductivity and matric potential for water management of
cranberry: Characterization and spatial interpolation methods. Biosystems Engineering. |
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