气候变化领域集成服务门户(CCPortal): Assessing landscape scale heterogeneity in irrigation water use with remote sensing and in situ monitoring

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DOI	10.1088/1748-9326/aaf2be
	Assessing landscape scale heterogeneity in irrigation water use with remote sensing and in situ monitoring
	Foster T.; Gonçalves I.Z.; Campos I.; Neale C.M.U.; Brozović N.
发表日期	2019
ISSN	17489318
卷号	14 期号:2
英文摘要	Understanding how irrigation is used across agricultural landscapes is essential to support efforts to grow more food while reducing pressures on limited freshwater resources. However, to date, few studies have analyzed the underlying spatial and temporal variability in farmers' individual water use decisions at a landscape scale. We compare estimates of irrigation water requirements derived using state-of-the-art remote sensing models with metered abstraction records for 1400 fields over a 13 year period in the US state of Nebraska, one of the world's most intensively irrigated agricultural regions. We show that farmers' observed water use decisions often diverge significantly from biophysical estimates of crop irrigation requirements. In particular, our findings are consistent with widespread use of water conservation practices by farmers in drought years as an adaptive response to rising irrigation costs and regulatory water supply constraints in these years. We also demonstrate that, in any individual year, farmers observed water use exhibits large field-to-field variability, which cannot be explained fully by differences in weather, soil type, crop choice, or technology. Our results highlight the value of using both in situ monitoring and remote sensing to evaluate farmers' individual water use behavior and understand likely responses to future changes in climate or water policy. Moreover, our findings also demonstrate potential challenges for current efforts in developed and developing countries to apply model-based approaches for field-level water use accounting and enforcement of irrigation water rights. © 2019 The Author(s). Published by IOP Publishing Ltd.
英文关键词	agriculture; irrigation; monitoring; remote sensing; water
语种	英语
scopus关键词	Agriculture; Crops; Developing countries; Irrigation; Monitoring; Water; Water conservation; Water management; Water supply; Agricultural landscapes; Conservation practices; Fresh water resources; Irrigation requirements; Irrigation water requirements; Irrigation water use; Remote sensing models; Spatial and temporal variability; Remote sensing; agricultural production; future prospect; heterogeneity; in situ measurement; irrigation system; landscape structure; remote sensing; water planning; water supply; water use efficiency; Nebraska; United States
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154709
作者单位	School of Mechanical, Aerospace and Civil Engineering, University of Manchester, United Kingdom; Robert B. Daugherty Water for Food Global Institute, University of Nebraska, United States; GIS and Remote Sensing Group, Instituto de Desarrollo Regional, Spain
推荐引用方式 GB/T 7714	Foster T.,Gonçalves I.Z.,Campos I.,et al. Assessing landscape scale heterogeneity in irrigation water use with remote sensing and in situ monitoring[J],2019,14(2).
APA	Foster T.,Gonçalves I.Z.,Campos I.,Neale C.M.U.,&Brozović N..(2019).Assessing landscape scale heterogeneity in irrigation water use with remote sensing and in situ monitoring.Environmental Research Letters,14(2).
MLA	Foster T.,et al."Assessing landscape scale heterogeneity in irrigation water use with remote sensing and in situ monitoring".Environmental Research Letters 14.2(2019).