Nitrate contamination and its relationship with flood irrigation management

Show simple item record García Garizábal, Íker Causapé Valenzuela, Jesús Antonio Abrahão, Raphael 2020-11-23T12:30:52Z 2020-11-23T12:30:52Z 2012-03-20
dc.identifier.citation Journal of Hydrology, vol.442–443, 15-22 es_ES
dc.identifier.issn 1879-2707
dc.description.abstract Nitrate contamination is a significant unresolved environmental issue for agriculture in the 21st century, with longstanding challenges in its control and allocation to a specified territory. In order to address these challenges, real-world meticulous irrigation area studies are required. The objective of this investigation is to analyze the evolution of nitrate contamination in relation to agronomic and management changes within a traditionally irrigated land. Specifically, the impact of changes in irrigation allowance assignment, changes in irrigation method from rotation to on-demand flood irrigation, and creation of water consumption accounts were analyzed. To this end, nitrogen monitoring and annual balances were carried out in a small irrigated hydrological basin (95 ha) located in Northeastern Spain throughout the years of 2001 and 2005–2008. The evolution of the nitrate contamination index was also analyzed, which relates the mass of nitrates exported to the fertilization necessities of a specific irrigated area. The results demonstrated that although changes in crop pattern caused a 33% reduction in the nitrogen required through fertilization, the fertilization rates applied are still double the necessities. Changes in irrigation management decreased the mass of nitrates exported by half and the nitrate contamination index by 24%, but the nitrate levels present are still approximately double of those registered in modern irrigation areas. The changes implemented by the Irrigation District in the irrigation management were effective. However, this study confirms that a greater effort is still required to achieve adequate nitrogen fertilization matching the crop necessities. es_ES
dc.description.sponsorship Facultad de Ciencias, Universidad de Zaragoza, España es_ES
dc.description.sponsorship Unidad de Zaragoza, Instituto Geológico y Minero de España, España es_ES
dc.language.iso en es_ES
dc.publisher Elsevier es_ES
dc.rights Otro es_ES
dc.subject irrigation return flows es_ES
dc.subject nitrate contamination es_ES
dc.subject nitrogen balance es_ES
dc.subject nitrogen application index es_ES
dc.subject España es_ES
dc.title Nitrate contamination and its relationship with flood irrigation management es_ES
dc.type Postprint es_ES
dc.relation.publisherversion es_ES
dc.identifier.doi es_ES
dc.coverage.spatialStudy España es_ES

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