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Water saving vs. farm economics in cotton surface irrigation: an application of multicriteria analysis
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Orientador(es)
Resumo(s)
Improving surface irrigation systems for cotton in Ras-El-Ain district, Northeast Syria, needs finding alternative
solutions that provide for both water saving and farm economic benefits in a context of small and
family farms. Multicriteria analysis was used to evaluate and rank a set of furrow and border irrigation
alternatives, with and without precise land leveling, that were created with the decision support system
SADREG. This approach allowed to consider various criteria, mainly water saving and farm economics.
Results show that both graded furrow and border alternatives are acceptable, with a slight advantage
for graded furrows. Alternatives without land leveling have shown to be more appropriate when focusing
farm economic results, while alternatives including land leveling were selected when priorities were
assigned to water saving. These results relate with higher costs of alternatives that consider land leveling.
Equipment for appropriate control of inflow rates was considered for all cases. The improved alternatives
may lead to savings of 20–28% of irrigation water and increasing the irrigation water productivity from
present 0.31 to 0.44 kg m−3. When the same alternatives were ranked for a 20% deficit irrigation their rankings
changed, with reduced ranks of alternatives requiring land leveling. This is due to the fact that yields
and yield values are reduced with deficit irrigation, thus making it less favorable to select alternatives that
imply higher costs. The study shows that adopting more advanced but more costly irrigation technologies
aimed at water saving requires appropriate economic incentives, training of farmers and an institutional
framework able to support the sustainable use of water in irrigation
Descrição
Palavras-chave
furrow and border irrigation economic water productivity land leveling deficit irrigation decision support systems Model SADREG Northeast Syria Khabour basin
Contexto Educativo
Citação
"Agricultural Water management". ISSN 0378-3774. 115 (2012) 223-231
Editora
Elsevier