Comparison among monitoring strategies to assess water flow dynamic and soil hydraulic properties in agricultural soils
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hdl:2117/106431
Tipus de documentArticle
Data publicació2015-06-10
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Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
ProjecteAPLICACION DE AGUA NO CONVENCIONAL (TRATADA-DESALADA) Y FANGOS PROCEDENTES DE DEPURADORAS URBANAS Y SU IMPACTO EN EL MEDIO ACUIFERO Y SUELOS. ETUDIOS DE CAMPOY LABORATORIO (MICINN-CGL2010-22168-C03-02)
?EVALUACION DE LOS EFECTOS DEL USO DE AGUAS NO CONVENCIONALES EN LA ZONA NO SATURADA Y SATURADA. ENFOQUE MULTIDISCIPLINAR (MINECO-CGL2013-48802-C3-3-R)
?EVALUACION DE LOS EFECTOS DEL USO DE AGUAS NO CONVENCIONALES EN LA ZONA NO SATURADA Y SATURADA. ENFOQUE MULTIDISCIPLINAR (MINECO-CGL2013-48802-C3-3-R)
Abstract
Irrigated agriculture is usually performed in semi-arid regions despite scarcity of water resources. Therefore, optimal irrigation
management by monitoring the soil is essential, and assessing soil hydraulic properties and water flow dynamics is presented as a
first measure. For this purpose, the control of volumetric water content, ¿, and pressure head, h, is required. This study adopted two
types of monitoring strategies in the same experimental plot to control ¿ and h in the vadose zone: i) non-automatic and more timeconsuming;
ii) automatic connected to a datalogger. Water flux was modelled with Hydrus-1D using the data collected from both
acquisition strategies independently (3820 daily values for the automatic; less than 1000 for the non-automatic). Goodness-of-fit
results reported a better adjustment in case of automatic sensors. Both model outputs adequately predicted the general trend of ¿
and h, but with slight differences in computed annual drainage (711 mm and 774 mm). Soil hydraulic properties were inversely
estimated from both data acquisition systems. Major differences were obtained in the saturated volumetric water content, ¿s, and
the n and a van Genuchten model shape parameters. Saturated hydraulic conductivity, Ks, shown lower variability with a coefficient
of variation range from 0.13 to 0.24 for the soil layers defined. Soil hydraulic properties were better assessed through automatic
data acquisition as data variability was lower and accuracy was higher.
CitacióCandela, L., Valdés-Abellán, J., Jiménez, J., Tamoh, K. Comparison among monitoring strategies to assess water flow dynamic and soil hydraulic properties in agricultural soils. "Spanish journal of agricultural research", 10 Juny 2015, vol. 13, núm. 1, p. e1201-e1201-15.
ISSN1695-971X
Versió de l'editorhttp://revistas.inia.es/index.php/sjar/article/view/6323/2217
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Agric-Res.pdf | 12,82Mb | Visualitza/Obre |