Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016WR020254 |
Evapotranspiration of urban landscapes in Los Angeles, California at the municipal scale | |
Litvak, E.1; Manago, K. F.2; Hogue, T. S.2; Pataki, D. E.1 | |
2017-05-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:5 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Evapotranspiration (ET), an essential process in biosphere-atmosphere interactions, is highly uncertain in cities that maintain cultivated and irrigated landscapes. We estimated ET of irrigated landscapes in Los Angeles by combining empirical models of turfgrass ET and tree transpiration derived from in situ measurements with previously developed remotely sensed estimates of vegetation cover and ground-based vegetation surveys. We modeled irrigated landscapes as a two-component system comprised of trees and turfgrass to assess annual and spatial patterns of ET. Annual ET from vegetated landscapes (ETveg) was 111053 mm/yr and ET from the whole city (vegetated and nonvegetated areas, ETland) was three times smaller, reflecting the fractional vegetation cover. With the exception of May and June, monthly ETland was significantly higher than predicted by the North American Land Data Assimilation System. ETveg was close to potential ET, indicating abundant irrigation inputs. Monthly averaged ETveg varied from 1.50.1 mm/d (December) to 4.30.2 mm/d (June). Turfgrass was responsible for approximate to 70% of ETveg. For trees, angiosperm species (71% of all trees) contributed over 90% to total tree transpiration, while coniferous and palm species made very small contributions. ETland was linearly correlated with median household income across the city, confirming the importance of social factors in determining spatial distribution of urban vegetation. These estimates have important implications for constraining the municipal water budget of Los Angeles and improving regional-scale hydrologic models, as well as for developing water-saving practices. The methodology used in this study is also transferable to other semiarid regions for quantification of urban landscape ET. |
英文关键词 | urban forest canopy cover irrigated lawns NLDAS LSM MHI |
领域 | 资源环境 |
收录类别 | SCI-E ; SSCI |
WOS记录号 | WOS:000403712100042 |
WOS关键词 | LAND-SURFACE EVAPORATION ; WATER-USE ; ENERGY-BALANCE ; TERRESTRIAL EVAPOTRANSPIRATION ; SEMIARID CLIMATE ; TREES ; VEGETATION ; LAWNS ; TRANSPIRATION ; PHOENIX |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
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/20854 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Utah, Dept Biol, Salt Lake City, UT 84112 USA; 2.Colorado Sch Mines, Civil & Environm Engn Dept, Illinois, CO USA |
推荐引用方式 GB/T 7714 | Litvak, E.,Manago, K. F.,Hogue, T. S.,et al. Evapotranspiration of urban landscapes in Los Angeles, California at the municipal scale[J]. WATER RESOURCES RESEARCH,2017,53(5). |
APA | Litvak, E.,Manago, K. F.,Hogue, T. S.,&Pataki, D. E..(2017).Evapotranspiration of urban landscapes in Los Angeles, California at the municipal scale.WATER RESOURCES RESEARCH,53(5). |
MLA | Litvak, E.,et al."Evapotranspiration of urban landscapes in Los Angeles, California at the municipal scale".WATER RESOURCES RESEARCH 53.5(2017). |
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