DOI: 10.5194/hess-19-583-2015
Scopus记录号: 2-s2.0-84921952695
论文题名: Divergence of actual and reference evapotranspiration observations for irrigated sugarcane with windy tropical conditions
作者: Anderson R ; G ; , Wang D ; , Tirado-Corbalá R ; , Zhang H ; , Ayars J ; E
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2015
卷: 19, 期: 1 起始页码: 583
结束页码: 599
语种: 英语
Scopus关键词: Evapotranspiration
; Soil moisture
; Tropics
; American society for civil engineers
; Canopy resistance
; Reference evapotranspiration
; Stomatal resistance
; Tropical conditions
; Tropical environments
; Tropical regions
; Vegetation coefficients
; Vegetation
; eddy covariance
; evapotranspiration
; irrigation system
; sugar cane
; tropical environment
; vegetation cover
; water stress
; wind field
; wind forcing
; Hawaii [United States]
; Hawaiian Islands
; Maui
英文摘要: Standardized reference evapotranspiration (ET) and ecosystem-specific vegetation coefficients are frequently used to estimate actual ET. However, equations for calculating reference ET have not been well validated in tropical environments. We measured ET (ETEC) using eddy covariance (EC) towers at two irrigated sugarcane fields on the leeward (dry) side of Maui, Hawaii, USA in contrasting climates. We calculated reference ET at the fields using the short (ET0) and tall (ETr) vegetation versions of the American Society for Civil Engineers (ASCE) equation. The ASCE equations were compared to the Priestley-Taylor ET (ETPT) and ETEC. Reference ET from the ASCE approaches exceeded ETEC during the mid-period (when vegetation coefficients suggest ETEC should exceed reference ET). At the windier tower site, cumulative ETr exceeded ETEC by 854 mm over the course of the mid-period (267 days). At the less windy site, mid-period ETr still exceeded ETEC, but the difference was smaller (443 mm). At both sites, ETPT approximated mid-period ETEC more closely than the ASCE equations ((ETPT-ETEC) < 170 mm). Analysis of applied water and precipitation, soil moisture, leaf stomatal resistance, and canopy cover suggest that the lower observed ETEC was not the result of water stress or reduced vegetation cover. Use of a custom-calibrated bulk canopy resistance improved the reference ET estimate and reduced seasonal ET discrepancy relative to ETPT and ETEC in the less windy field and had mixed performance in the windier field. These divergences suggest that modifications to reference ET equations may be warranted in some tropical regions. © Author(s) 2015. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78621
Appears in Collections: 气候变化事实与影响
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作者单位: USDA, Agricultural Research Service, San Joaquin Valley Agricultural Sciences Center, Water Management Research Unit, Parlier, CA, United States; USDA, Agricultural Research Service, U.S. Salinity Laboratory, Contaminant Fate and Transport Unit, Riverside, CA, United States; Crops and Agro-Environmental Science Department, University of Puerto Rico, Mayagüez, Puerto Rico, United States; USDA, Agricultural Research Service, Water Management Research Unit, Fort Collins, CO, United States
Recommended Citation:
Anderson R,G,, Wang D,et al. Divergence of actual and reference evapotranspiration observations for irrigated sugarcane with windy tropical conditions[J]. Hydrology and Earth System Sciences,2015-01-01,19(1)