Regional assessment of evaporation from agricultural irrigation reservoirs in a semiarid climate

Álvarez, Victoriano Martínez; González-Real, M.M.; Baille, Alain; Valero, José Francisco Maestre; Gallego-Elvira, Belén

doi:10.1016/j.agwat.2008.04.003

Cited by 72 publications

(46 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…AWRs are typically used in southeast Spain and other regions across the world to solve this problem and to cope with the variable water allotments and periods without supply, guaranteeing water all year round (Daigo and Phaovattana 1999;Martínez-Alvarez et al 2006;Ali et al 2008). According to Martínez-Alvarez et al (2008) there are more than 1.5 × 10 4 AWRs in the Segura basin. Their spatial distribution is shown in Fig.…”

Section: Water Reservoirsmentioning

confidence: 98%

“…Class-A pan evaporation data (Ep) has been considered in this study as the most suitable way to estimate evaporation from open water reservoirs (Martínez-Alvarez et al 2008;Lowe et al 2009), as it provides a sufficient level of accuracy for a largescale assessment and for the current availability of data. This method is commonly used to derive the evaporation rate (E) of a water surface for hydrological applications (Linsley et al 1992), or to derive the reference crop evapotranspiration rate (ET) for agricultural and irrigation purposes (Doorenbos and Pruitt 1977;Allen et al 1998;López-Urrea et al 2006).…”

Section: Calculating Evaporation Lossesmentioning

confidence: 99%

“…These losses are subtracted from gross water demands under the "current situation" water availability scenario. They are estimated using the methodology proposed by Martínez-Alvarez et al (2008), as shown in Section 3.2.1.…”

Section: Water Availability and Evaporation Scenariosmentioning

confidence: 99%

“…In the Rio Grande basin (USA), evaporation from a mid-sized reservoir (Elephant Butte) accounts for 15-25% of the Rio Grande (New Mexico) water consumption allotment each year (Gupta et al 2002). Particularly, Martínez-Alvarez et al (2008) estimated the annual evaporation from on-farm reservoirs in the Segura basin at around 58.3 × 10 6 m 3 , more than 8% of irrigation water use in the basin. Such a loss affects the overall water use efficiency, especially in agriculture, where it counterbalances most of the gains derived from the generalized application of efficient on-farm irrigation technologies (drip and micro-sprinkling).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The Economic Impact of Water Evaporation Losses from Water Reservoirs in the Segura Basin, SE Spain

Martínez-Granados

Valero

Calatrava

et al. 2011

Water Resour Manage

View full text Add to dashboard Cite

In this paper we assess the economic impact of evaporation losses from great dams (GDs) and on-farm agricultural water reservoirs (AWRs) in the semi-arid Segura River basin, SE Spain. Evaporation losses from water reservoirs reduce the high water use efficiency reached in agriculture by means of other techniques such as well-built water pipes or drip irrigation and have a substantial economic impact. Evaporation losses have been calculated using Class-A pan evaporation data and pan coefficients, whereas their economic impact has been assessed using an economic mathematical programming model that simulates land and water allocation in the different irrigated areas of the basin. Our results show that annual evaporation from GDs and AWRs represents 8.7% of the water currently available for irrigation in the Segura basin. The economic impact of such losses has been estimated in a reduction of 6.3% of the value of agricultural production and 5.4% of the farm net margin. As less water is effectively available for farmers the basin's irrigated area is reduced in a 7.5%. This impact is greater, in both absolute and relative terms, in the areas accommodating the most intensive and profitable irrigated agriculture. The applied methodology and results could be useful to regional water agencies and collective irrigation schemes for future planning and management, including the assessment of alternatives for reducing evaporation from reservoirs.

show abstract

Section: Water Reservoirsmentioning

confidence: 98%

Section: Calculating Evaporation Lossesmentioning

confidence: 99%

Section: Water Availability and Evaporation Scenariosmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Economic Impact of Water Evaporation Losses from Water Reservoirs in the Segura Basin, SE Spain

Martínez-Granados

Valero

Calatrava

et al. 2011

Water Resour Manage

View full text Add to dashboard Cite

show abstract

“…In arid and semi-arid climates, water stored in reservoirs would be better managed if evaporation losses from the water surface were reduced but the practice of covering irrigation reservoirs is still relatively little used, although as water is becoming an ever scarcer resource, interest in these systems is expected to grow in the future. Techno-economic analyses conducted for several mitigation evaporation technologies confirm the exposed trend [1,2]. Also, economics of deploying floating photovoltaic (PV) array concept for commercial electricity generation has been successfully developed by Trapani et al [3,4].…”

Section: Introductionmentioning

confidence: 95%

Implementation of a photovoltaic floating cover for irrigation reservoirs

Santafé

Gisbert

Romero

et al. 2014

Journal of Cleaner Production

114

View full text Add to dashboard Cite

ElsevierRedón-Santafé, M.; Ferrer-Gisbert, P.; Sánchez-Romero, F.;Torregrosa Soler, JB.; Ferran Gozalvez, JJ.; Ferrer Gisbert, CM. (2014) The article presents the main features of a floating photovoltaic cover system (FPCS) for water irrigation reservoirs whose purpose is to reduce the evaporation of water while generating electrical power. The system consists of polyethylene floating modules which are able to adapt to varying reservoir water levels by means of tension bars and elastic fasteners.

show abstract

A Theoretical Proposal for the Synthesis of Carbapenems from 4‐(2‐Propynyl)azetidinones Promoted by [W(CO)₅] as an Alternative to the Ag⁺‐Assisted Process

Campomanes

Menéndez

Sordo

2006

Chemistry A European J

View full text Add to dashboard Cite

The synthesis of carbapenems from 4-(2-propynyl)azetidinones assisted by both Ag+ and [W(CO)5] was theoretically investigated by using the B3LYP/6-31+G(d)-LANL2DZ level, taking into account the effect of solvent by the PB-SCRF model implemented in Jaguar. According to our results, the silver-assisted cyclization is a concerted process for which the low yield experimentally observed could mainly stem from the alkaline hydrolysis of the beta-lactam ring. This process is very efficiently catalyzed by Ag+, making it competitive with the formation of the carbapenem. The cycloisomerization of 4-(2-propynyl)azetidinone promoted by [W(CO)5] is proposed as an alternative synthetic strategy to obtain the carbapenem. The endo cycloisomerization is by far the most favorable one. When the process is assisted by [(thf)W(CO)5], although the main product is the carbapenem, the formation of a carbene complex represents a certain competition. The presence of a Me3N molecule from the very start of the reaction causes an important catalytic effect considerably reducing the energy barriers corresponding to the H atom transfers and rendering a very efficient process. Moreover, this catalytic action determines the evolution of the system through only one mechanistic route which produces the carbapenem, hindering the formation of the carbene. Therefore, the cycloisomerization of 4-(2-propynyl)azetidinone promoted by [(Me3N)W(CO)5] constitutes an interesting alternative to the silver-assisted cyclization.

show abstract

Regional assessment of evaporation from agricultural irrigation reservoirs in a semiarid climate

Cited by 72 publications

References 14 publications

The Economic Impact of Water Evaporation Losses from Water Reservoirs in the Segura Basin, SE Spain

The Economic Impact of Water Evaporation Losses from Water Reservoirs in the Segura Basin, SE Spain

Implementation of a photovoltaic floating cover for irrigation reservoirs

A Theoretical Proposal for the Synthesis of Carbapenems from 4‐(2‐Propynyl)azetidinones Promoted by [W(CO)₅] as an Alternative to the Ag⁺‐Assisted Process

Contact Info

Product

Resources

About

Regional assessment of evaporation from agricultural irrigation reservoirs in a semiarid climate

Cited by 72 publications

References 14 publications

The Economic Impact of Water Evaporation Losses from Water Reservoirs in the Segura Basin, SE Spain

The Economic Impact of Water Evaporation Losses from Water Reservoirs in the Segura Basin, SE Spain

Implementation of a photovoltaic floating cover for irrigation reservoirs

A Theoretical Proposal for the Synthesis of Carbapenems from 4‐(2‐Propynyl)azetidinones Promoted by [W(CO)5] as an Alternative to the Ag+‐Assisted Process

Contact Info

Product

Resources

About

A Theoretical Proposal for the Synthesis of Carbapenems from 4‐(2‐Propynyl)azetidinones Promoted by [W(CO)₅] as an Alternative to the Ag⁺‐Assisted Process