Sustainability and environmental assessment of fertigation in an intensive olive grove under Mediterranean conditions

Cameira, Maria do Rosário; Pereira, Ana Santos; Ahuja, Lajpat R.; Li, Ma

doi:10.1016/j.agwat.2014.09.007

Cited by 30 publications

(25 citation statements)

References 48 publications

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“…One of them is the use of mathematical models to assess the fate of N in the soil-crop environment from the field to the watershed scales. The Root Zone Water Quality Model (RZWQM) [67][68][69] was already successfully used at the field scale in some areas of the Tagus basin. The model simulates N transformations, uptake, and transport in the soil-crop systems, making it possible to evaluate field measured soil hydraulic properties and to predict N related variables for different boundary conditions (irrigation and fertilization) with a good accuracy.…”

Section: Best Management Practicesmentioning

confidence: 99%

A Simplified Nitrogen Assessment in Tagus River Basin: A Management Focused Review

Cordovil

Cruz

Brito

et al. 2018

Water

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Interactions among nitrogen (N) management and water resources quality are complex and enhanced in transboundary river basins. This is the case of Tagus River, which is an important river flowing from Spain to Portugal in the Iberian Peninsula. The aim was to provide a N assessment review along the Tagus River Basin regarding mostly agriculture, livestock, and urban activities. To estimate reactive nitrogen (N r) load into surface waters, emission factor approaches were applied. N r pressures are much higher in Spain than in Portugal (~13 times), which is mostly because of livestock intensification. Some policy and technical measures have been defined aiming at solving this problem. Main policy responses were the designation of Nitrate Vulnerable and Sensitive Zones, according to European Union (EU) directives. Nitrate Vulnerable Zone comprise approximately one third of both territories. On the contrary, Sensitive Zones are more extended in Spain, attaining 60% of the watershed, against only 30% in Portugal. Technical measures comprised advanced urban and industrial wastewater treatment that was designed to remove N compounds before discharge in the water bodies. Given this assessment, Tagus River Basin sustainability can only be guaranteed through load inputs reductions and effective transnational management processes of water flows.

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Section: Best Management Practicesmentioning

confidence: 99%

A Simplified Nitrogen Assessment in Tagus River Basin: A Management Focused Review

Cordovil

Cruz

Brito

et al. 2018

Water

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“…more than 46% of the total area covered by olive groves is irrigated. including 45,000 hectares occupied by intensive [123] and 4000 hectares covered by super-intensive olive groves [124].…”

Section: Portugal As a Case Studymentioning

confidence: 99%

Hyperspectral Reflectance as a Basis to Discriminate Olive Varieties—A Tool for Sustainable Crop Management

et al. 2020

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Worldwide sustainable development is threatened by current agricultural land change trends, particularly by the increasing rural farmland abandonment and agricultural intensification phenomena. In Mediterranean countries, these processes are affecting especially traditional olive groves with enormous socio-economic costs to rural areas, endangering environmental sustainability and biodiversity. Traditional olive groves abandonment and intensification are clearly related to the reduction of olive oil production income, leading to reduced economic viability. Most promising strategies to boost traditional groves competitiveness—such as olive oil differentiation through adoption of protected denomination of origin labels and development of value-added olive products—rely on knowledge of the olive varieties and its specific properties that confer their uniqueness and authenticity. Given the lack of information about olive varieties on traditional groves, a feasible and inexpensive method of variety identification is required. We analyzed leaf spectral information of ten Portuguese olive varieties with a powerful data-mining approach in order to verify the ability of satellite’s hyperspectral sensors to provide an accurate olive variety identification. Our results show that these olive varieties are distinguishable by leaf reflectance information and suggest that even satellite open-source data could be used to map them. Additional advantages of olive varieties mapping were further discussed.

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“…This additional fertilization at field level may reduce the positive effect of reduced pollution highlighted by several authors (Cameira et al, 2014;Janat, 2008Janat, , 2007Lecina et al, 2010aLecina et al, , 2010bOppong Danso et al, 2015).…”

Section: Fertigation Managementmentioning

confidence: 99%

Collective management of irrigation in eastern Spain. Integration of new technologies and water resources.

Reig¹,

Violeta²

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Vicent Andrés EstellésLes pedres de l'àmfora. Obra completa 2, (1972, p.252), L'Estel, Valencia (Spain) The aim of this thesis is to analyze how farmer-managed systems adapt to the changes related to the integration of new water resources and drip irrigation technologies. This work includes two main parts. The first one focuses on traditional gravity irrigation and the emergence of new water resources. The second one looks at irrigation systems that have been transformed to drip irrigation. All the studies included in this dissertation centre the attention in understanding aspects of collective management. For this reason, special consideration is placed on the perceptions of farmers and managers of Water User Associations by means of semi-structured interviews.Chapters two and three study the operating principles for water management.These principles, when applied by farmers as collective rules, result in interactions that create equity on water rights and transparency. The study area includes the irrigation system of the Huerta of Valencia (Spain). This system, well known internationally, has traditionally used surface water from the Turia River. Though recently, the use of groundwater and treated wastewater have been integrated with surface water. In this context, the analysis evolves around the subject of how the rules, developed for the sharing of surface water, have been adapted for conjunctive use of these new water resources. In addition, attention is also placed on how this process was crucial for the management of the 2005 -2008 drought period.Results show that the operating principles, based in the proportionality and uniformity on irrigation frequency between users, underlie a system of distribution that is equitable, transparent and robust. In addition, the use of drought emergency wells and the reuse of treated wastewater have not resulted in any important conflict. These resources are used together with surface water during drought periods, increasing the guarantee of supply. However, treated wastewater use affects the uniformity on irrigation frequency among Water User Associations. Besides, Groundwater User Associations overlap in irrigated surface, farmers and infrastructure with Water User Associations Chapter five discusses and compares the implications of the previous chapters.Some aspects of irrigation management and governance are assessed in a more detailed manner for the case of gravity irrigation Water Users Associations. In addition, the changes related to the introduction of drip irrigation technologies and new water resources are further compared. The two processes present challenges for irrigation organization. Meanwhile the integration of new water sources has been gradual and does not entail major changes for self-organization, drip irrigation promotes a fundamental institutional change. This change may have a disruptive effect on self-organization if this new community-based drip irrigation does not manage to adapt and include braoder aspects of irrigation management beyond pu...

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Sustainability and environmental assessment of fertigation in an intensive olive grove under Mediterranean conditions

Cited by 30 publications

References 48 publications

A Simplified Nitrogen Assessment in Tagus River Basin: A Management Focused Review

A Simplified Nitrogen Assessment in Tagus River Basin: A Management Focused Review

Hyperspectral Reflectance as a Basis to Discriminate Olive Varieties—A Tool for Sustainable Crop Management

Collective management of irrigation in eastern Spain. Integration of new technologies and water resources.

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