GSTDTAP  > 气候变化
DOI10.1088/1748-9326/ab20d4
Shifting landscapes: decoupled urban irrigation and greenness patterns during severe drought
Quesnel, Kimberly J.1,2; Ajami, Newsha2,3; Marx, Andrew4
2019-06-01
发表期刊ENVIRONMENTAL RESEARCH LETTERS
ISSN1748-9326
出版年2019
卷号14期号:6
文章类型Article
语种英语
国家USA
英文摘要

Urban outdoor water conservation and efficiency offer high potential for demand-side management, but irrigation, greenness, and climate interlinks must be better understood to design optimal policies. To identify paired transitions during drought, we matched parcel-level water use data from smart, dedicated irrigation meters with high-spatial resolution, multispectral aerial imagery. We examined changes across 72 non-residential parcels using potable or recycled water for large landscape irrigation over four biennial summers (2010, 2012, 2014, and 2016) that encompassed a historic drought in California. We found that despite little change in irrigation levels during the first few years of the drought, parcel greenness deteriorated. Between summers 2010 and 2014, average parcel greenness decreased -61% for potable water irrigators and -56% for recycled water irrigators, providing evidence that vegetation could not reach its vigor from wetter, cooler years as the drought intensified with abnormally high temperatures. Between summers 2014-2016 as drought severity lessened, irrigation rates decreased significantly in line with high drought saliency, but greenness rebounded ubiquitously, on average +110% for potable water irrigators and +62% for recycled water irrigators, demonstrating climate-driven vegetation recovery as evaporation and plant evapotranspiration rates decreased. Transitions were similar for customers with both potable and recycled water; vegetation changes were dominated by the overarching climatic regime. As irrigation cannot always overcome drought conditions, which will become more severe under climate change, to maintain vegetation health, utilities and urban planners should consider the tradeoffs between providing green spaces and water scarcity. This includes evaluating the roles of climate-appropriate landscaping and adaptive reallocation of potable and recycled water resources to enhance water security. By addressing emerging themes in urban water management through analysis of data from forthcoming water metering and aerial imagery technologies, this research provides a unique perspective on water use, greenness, and drought linkages.


英文关键词urban irrigation water conservation land cover classification outdoor water use landscape greenness
领域气候变化
收录类别SCI-E ; SSCI
WOS记录号WOS:000470867900001
WOS关键词RESIDENTIAL WATER-USE ; LOS-ANGELES ; CONSERVATION ; CONSUMPTION ; MANAGEMENT ; AUSTIN ; TRENDS ; COVER ; LAWNS
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/183733
专题气候变化
作者单位1.Stanford Univ, Dept Civil & Environm Engn, Stanford, CA 94305 USA;
2.Stanford Univ, ReNUWIt Engn Res Ctr, Stanford, CA 94305 USA;
3.Stanford Univ, Woods Inst Environm, Stanford, CA 94305 USA;
4.Univ Southern Calif, Dornsife Coll Letters Arts & Sci, Spatial Sci Inst, Los Angeles, CA USA
推荐引用方式
GB/T 7714
Quesnel, Kimberly J.,Ajami, Newsha,Marx, Andrew. Shifting landscapes: decoupled urban irrigation and greenness patterns during severe drought[J]. ENVIRONMENTAL RESEARCH LETTERS,2019,14(6).
APA Quesnel, Kimberly J.,Ajami, Newsha,&Marx, Andrew.(2019).Shifting landscapes: decoupled urban irrigation and greenness patterns during severe drought.ENVIRONMENTAL RESEARCH LETTERS,14(6).
MLA Quesnel, Kimberly J.,et al."Shifting landscapes: decoupled urban irrigation and greenness patterns during severe drought".ENVIRONMENTAL RESEARCH LETTERS 14.6(2019).
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