气候变化领域集成服务门户(CCPortal): Assessment of potential implications of agricultural irrigation policy on surface water scarcity in Brazil

CCPortal

DOI	10.5194/hess-24-307-2020
	Assessment of potential implications of agricultural irrigation policy on surface water scarcity in Brazil
	Multsch S.; Krol M.S.; Pahlow M.; Assunção A.L.C.; Barretto A.G.O.P.; De Jong Van Lier Q.; Breuer L.
发表日期	2020
ISSN	1027-5606
起始页码	307
结束页码	324
卷号	24 期号:1
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.
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
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159521
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 Environmen...
推荐引用方式 GB/T 7714	Multsch S.,Krol M.S.,Pahlow M.,et al. Assessment of potential implications of agricultural irrigation policy on surface water scarcity in Brazil[J],2020,24(1).
APA	Multsch S..,Krol M.S..,Pahlow M..,Assunção A.L.C..,Barretto A.G.O.P..,...&Breuer L..(2020).Assessment of potential implications of agricultural irrigation policy on surface water scarcity in Brazil.Hydrology and Earth System Sciences,24(1).
MLA	Multsch S.,et al."Assessment of potential implications of agricultural irrigation policy on surface water scarcity in Brazil".Hydrology and Earth System Sciences 24.1(2020).