Medições e modelagem da pegada hídrica da cana-de-açúcar cultivada no Estado da Paraíba

Silva, Vicente de Paulo Rodrigues da; Albuquerque, Monik F. de; Araújo, Lincoln Eloi de; Campos, João Hugo Baracuy da Cunha; Garcêz, Silvia L. A.; Almeida, Rafaela Silveira Rodrigues

doi:10.1590/1807-1929/agriambi.v19n6p521-526

Cited by 13 publications

(9 citation statements)

References 17 publications

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“…Estimated water footprints include uncertainties in all studies. Silva et al [40] compared the sugarcane water footprint estimates derived from modeling with the CropWat model and those obtained from field studies and found that Mekonnen and Hoekstra [41] significantly overestimated the water footprints of sugarcane grown in rain-fed systems in Brazil.…”

Section: Discussionmentioning

confidence: 99%

Water Footprint and Virtual Water Trade of Brazil

Silva

Oliveira

Hoekstra

et al. 2016

Water

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Freshwater scarcity has increased at an alarming rate worldwide; improved water management plays a vital role in increasing food production and security. This study aims to determine the water footprint of Brazil's national food consumption, the virtual water flows associated with international trade in the main agricultural commodities, as well as water scarcity, water self-sufficiency and water dependency per Brazilian region. While previous country studies on water footprints and virtual water trade focused on virtual water importers or water-scarce countries, this is the first study to concentrate on a water-abundant virtual water-exporting country. Besides, it is the first study establishing international virtual water trade balances per state, which is relevant given the fact that water scarcity varies across states within the country, so the origin of virtual water exports matters. The results show that the average water footprint of Brazilian food consumption is 1619 m 3 /person/year. Beef contributes most (21%) to this total. We find a net virtual water export of 54.8 billion m 3 /year, mainly to Europe, which imports 41% of the gross amount of the virtual water exported from Brazil. The northeast, the region with the highest water scarcity, has a net import of virtual water. The southeast, next in terms of water scarcity, shows large virtual water exports, mainly related to the export of sugar. The north, which has the most water, does not show a high virtual water export rate.

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Section: Discussionmentioning

confidence: 99%

Water Footprint and Virtual Water Trade of Brazil

Silva

Oliveira

Hoekstra

et al. 2016

Water

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“…In a study of the WF for water basins located in São Paulo, Scarpare et al (2015) found the blue, green and grey WFs of sugarcane to be 38, 145 and 18 m³ t -1 , respectively. Silva et al (2015), meanwhile, yielded results of 107.39, 119.56 and 9.00 m³ t -1 , respectively, for the blue, green and grey WFs of sugarcane grown in the state of Paraíba using the CropWat model. These latter authors also found that in treatment with irrigation at 100% evapotranspiration, the blue WF (measured at 97.71 m³ t -1 ) was higher than the green WF (50.24 m³ t -1 ).…”

Section: Water Footprint Of Sugarcanementioning

confidence: 98%

The water footprint of the sugarcane agro-industry in the Northeast region of Brazil

2019

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The water footprint (WF) is an important indicator for water management, as it identifies the amount of water used directly and indirectly by a consumer or a product. The objective of this study is to analyze the sugarcane industry's WF in Brazil's Northeast region for the 2016/17 and 2017/18 harvest seasons. The blue, green and grey WFs of sugarcane were quantified, as well as the blue WFs of the production processes of ethanol and sugar, the main subproducts of sugarcane for both harvests. The work was carried out in an area with 18.42 hectares of sugarcane crops under sprinkler irrigation. The process of sugarcane production and use of pesticides was surveyed and meteorological data for the production period was collected. Right after, mathematical models were used to estimate the blue, green and grey WFs. The WF of the sugarcane was found to be 2,364.87 m³ t-1 and 1,043.92 m³ t-1 for the first and second harvest, respectively. The grey WF made up the largest part of this value, mostly due to use of the pesticides Diuron 800 and Imazapic. The processes of ethanol and sugar production, meanwhile, were found to have a blue WF of approximately 10 m³ t-1 and 5 m³ t-1, respectively. From these results, we can conclude that the WF is an effective indicator for monitoring water use in the production cycle of sugarcane and its subproducts, and that the use of fewer polluting pesticides would aid in reducing the WF of this cycle.

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“…Mekonnen and Hoekstra (2011a;2011b; estimated the grey water footprint of approximately 287.1 m 3 t -1 for the wheat culture. Silva et al, (2015) reported the value of 20.77 m 3 ha -1 for GWF of sugar cane in a dry-farming cultivation system. These results were well lower than those we found in our study.…”

Section: Grey Water Footprint For Onionmentioning

confidence: 99%

“…In this context, the grey water footprint is characterized as the volume of freshwater required to dilute the load of pollutants, taking into consideration the natural concentrations and in the environmental standards in place (Hoekstra and Chapagain, 2007). Hoekstra (2009) and Silva et al (2015) reported that pollution of the waters can be expressed in terms of the volume of water needed to dilute pollutants so that they become ineffective.…”

Section: Introductionmentioning

confidence: 99%

Sustainability of the grey water footprint (GWF) for cultivation of onion in the Brazilian semi-arid regions

Matos¹,

Borges²,

Lima³

et al. 2017

Aust J Crop Sci

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The grey water footprint (GWF) is defined as the volume of freshwater that is required to dilute pollutants to make them harmless. The objective of this study was to evaluate the grey water footprint and its sustainability for onion cultivation in the Brazilian semiarid regions. The work was developed in the Brazilian semi-arid region in an area corresponding to 10 thousand hectares of onion cultivation under surface irrigation. A survey of the main pollutants was carried out, in addition to the environmental conditions of soil and climate, soon after using mathematical models to estimate the grey water footprint and sustainability. The agrochemicals Ronstar 250 BR, Dicarzol 500 PS and Sportak 450 CE are classified as having the highest grey water footprint for onion cultivation in the Brazilian semi-arid region; thus requiring a higher volume of freshwater for pollutants dilution to convert them to harmless. It is recommended to replace these agrochemicals with others of smaller GWF. According to the obtained results, it can be concluded that the grey water footprint is an efficient indicator in monitoring the impact of man on the environment. The semi-arid regions of Brazil classified as sustainable for the cultivation of irrigated onions.

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Medições e modelagem da pegada hídrica da cana-de-açúcar cultivada no Estado da Paraíba

Cited by 13 publications

References 17 publications

Water Footprint and Virtual Water Trade of Brazil

Water Footprint and Virtual Water Trade of Brazil

The water footprint of the sugarcane agro-industry in the Northeast region of Brazil

Sustainability of the grey water footprint (GWF) for cultivation of onion in the Brazilian semi-arid regions

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