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http://hdl.handle.net/10174/1738
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Title: | Comparative analysis of main on-farm irrigation systems in Portugal |
Authors: | Sousa, Pedro L. Silva, Luis Leopoldo Serralheiro, Ricardo P. |
Keywords: | Irrigation systems On-farm irrigation Cost-benefit analysis |
Issue Date: | 1999 |
Publisher: | Elsevier |
Abstract: | Traditional irrigation systems still cover a large area of irrigated lands in Portugal. The needs for
competitiveness leads to the gradual abandon of traditional systems, resulting in social and
economic impacts. Pressurised on-farm irrigation systems provide labour savings but imply
important investments. Surface irrigation does not require expensive equipment and is low energy
and low labour consuming, if modern systems are implemented. Flexible-pipe, gated-pipe, surge-
flow valve and cablegation are the main equipment issues available to Portuguese farmers for
modern surface irrigation practice. Conditions for application of these systems have been studied
relative to different soil and topographic conditions. Plane land, either horizontal or sloped and
undulated fields can be irrigated by surface systems, if a convenient design is accomplished. The
adequacy of the irrigation systems has been evaluated and a cost-benefit study was carried out. A
case study of a situation with undulated land, representative of South Portugal, is presented in this
paper, comparing surface irrigation issues and a sprinkler system. Conclusions show a particular
economic interest on adopting surge-valve, gated-pipe and cablegation. |
URI: | http://hdl.handle.net/10174/1738 |
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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