globalchange  > 气候变化与战略
DOI: 10.5194/hess-24-307-2020
论文题名:
Assessment of potential implications of agricultural irrigation policy on surface water scarcity in Brazil
作者: Multsch S.; Krol M.S.; Pahlow M.; Assunção A.L.C.; Barretto A.G.O.P.; De Jong Van Lier Q.; Breuer L.
刊名: Hydrology and Earth System Sciences
ISSN: 1027-5606
出版年: 2020
卷: 24, 期:1
起始页码: 307
结束页码: 324
语种: 英语
Scopus关键词: Crops ; Economic and social effects ; Expansion ; Irrigation ; Rain ; Surface water resources ; Water management ; Agricultural irrigation ; Agricultural productions ; Production practice ; Rain fed agriculture ; Regional effects ; Sustainable agricultural ; Water availability ; Water balance components ; Surface waters ; agricultural production ; assessment method ; crop plant ; irrigation system ; rainfed agriculture ; river flow ; soybean ; surface water ; trade-off ; water budget ; water use ; Brazil ; Glycine max ; Gossypium hirsutum ; Manihot esculenta ; Triticum aestivum ; Zea mays
英文摘要: Expanding irrigated cropping areas is one of Brazil's strategies to increase agricultural production. This expansion is constrained by water policy goals to restrict water scarcity to acceptable levels. We therefore analysed the trade-off between levels of acceptable water scarcity and feasible expansion of irrigation. The appropriateness of water use in agricultural production was assessed in categories ranging from acceptable to very critical based on the river flow that is equalled or exceeded 95% of the time (Q95) as an indicator for physical water availability. The crop water balance components were determined for 166 842 subcatchments covering all of Brazil. The crops considered were cotton, rice, sugarcane, bean, cassava, corn, soybean and wheat, together accounting for 96% of the harvested area of irrigated and rain-fed agriculture. On currently irrigated land irrigation must be discontinued on 54% (2.3 Mha) for an acceptable water scarcity level, on 45% (1.9 Mha) for a comfortable water scarcity level and on 35% (1.5 Mha) for a worrying water scarcity level, in order to avoid critical water scarcity. An expansion of irrigated areas by irrigating all 45.6 Mha of the rain-fed area would strongly impact surface water resources, resulting in 26.0 Mha experiencing critical and very critical water scarcity. The results show in a spatially differentiated manner that potential future decisions regarding expanding irrigated cropping areas in Brazil must, while pursuing to intensify production practices, consider the likely regional effects on water scarcity levels, in order to reach sustainable agricultural production. © Author(s) 2020.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162811
Appears in Collections:气候变化与战略

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作者单位: Multsch, S., Institute for Landscape Ecology and Resources Management (ILR), Research Centre for BioSystems, Land Use and Nutrition (IFZ), Justus Liebig University Giessen, Giessen, Germany, Knoell Germany GmbH, Mannheim, Germany; Krol, M.S., Water Engineering and Management, University of Twente, Enschede, Netherlands; Pahlow, M., Department of Civil and Natural Resources Engineering, University of Canterbury, Christchurch, New Zealand; Assunção, A.L.C., Luiz de Queiroz College of Agriculture (ESALQ), University of São Paulo, São Paulo, Brazil; Barretto, A.G.O.P., Luiz de Queiroz College of Agriculture (ESALQ), University of São Paulo, São Paulo, Brazil; De Jong Van Lier, Q., Center for Nuclear Energy in Agriculture (CENA), University of São Paulo, São Paulo, Brazil; Breuer, L., Institute for Landscape Ecology and Resources Management (ILR), Research Centre for BioSystems, Land Use and Nutrition (IFZ), Justus Liebig University Giessen, Giessen, Germany, Center for International Development and Environmental Research (ZEU), Justus Liebig University Giessen, Giessen, Germany

Recommended Citation:
Multsch S.,Krol M.S.,Pahlow M.,et al. Assessment of potential implications of agricultural irrigation policy on surface water scarcity in Brazil[J]. Hydrology and Earth System Sciences,2020-01-01,24(1)
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