Please use this identifier to cite or link to this item:
http://hdl.handle.net/10174/1726
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Title: | Fitting infiltration equations to centre-pivot irrigation data |
Authors: | Silva, Luis Leopoldo |
Keywords: | Infiltration equations Center-pivot Mediterranean soils Equações de Infiltração Rampa rotativa Solos Mediterrânicos |
Issue Date: | 24-Sep-2007 |
Publisher: | Elsevier |
Abstract: | Centre-pivot irrigation systems often lead to runoff problems, due to the difficulty in
adapting high-water application rates to soil infiltrability. To avoid such problems, a good
understanding of soil infiltration characteristics and the factors that influence infiltration
rate is necessary. Field tests were carried out, for 2 years, in a Mediterranean soil with
different antecedent soil surface conditions and variable water application rates under a
centre-pivot irrigation system. The soil infiltration rate was found to decrease not only with
an increase in soil water content but also with soil surface compaction. Centre-pivot
sprinklers equipped with medium grooved deflectors produced lower infiltration rate values
compared to sprinklers with smooth deflectors. The increase in water application rates
leads to an increase in soil infiltration rate, especially for durations of less than 25–30 min.
Infiltration equations obtained from infiltration tests following previous water application
events account for the effect of soil surface compaction and are recommended for design
and management of centre-pivot systems. Infiltration tests data was used to fit to different
infiltration equations. The Kostiakov-type equation showed the best adjustment to the field
data. |
URI: | http://hdl.handle.net/10174/1726 |
ISSN: | 0378-3774 |
Type: | article |
Appears in Collections: | ERU - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica MED - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica
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