Arid
DOI10.3390/rs4113619
Infrared Thermometry to Estimate Crop Water Stress Index and Water Use of Irrigated Maize in Northeastern Colorado
Taghvaeian, Saleh1; Chavez, Jose L.1; Hansen, Neil C.2
通讯作者Taghvaeian, Saleh
来源期刊REMOTE SENSING
ISSN2072-4292
出版年2012
卷号4期号:11页码:3619-3637
英文摘要

With an increasing demand of fresh water resources in arid/semi-arid parts of the world, researchers and practitioners are relying more than ever on remote sensing techniques for monitoring and evaluating crop water status and for estimating crop water use or crop actual evapotranspiration (ETa). In this present study, infrared thermometry was used in conjunction with a few weather parameters to develop non-water-stressed and non-transpiring baselines for irrigated maize in a semi-arid region of Colorado in the western USA. A remote sensing-based Crop Water Stress Index (CWSI) was then estimated for four hourly periods each day during 5 August to 2 September 2011 (29 days). The estimated CWSI was smallest during the 10:00-11:00 a.m. and largest during the 12:00-13:00 p.m. hours. Plotting volumetric water content of the topsoil vs. CWSI revealed that there is a high correlation between the two parameters during the analyzed period. CWSI values were also used to estimate maize actual transpiration (T-a). T-a estimates were more influenced by crop biomass rather than irrigation depths alone, mainly due to the fact that the effects of deficit irrigation were largely masked by the significant precipitation during the growing season. During the study period, applying an independent remotely sensed energy balance model showed that maize ETa was 159 mm, 30% larger than CWSI-T-a (122 mm) and 9% smaller than standard-condition maize ET (174 mm).


英文关键词crop water stress index evapotranspiration maize Northeastern Colorado
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000313914500018
WOS关键词ENERGY-BALANCE ; CORN ; CALIBRATION
WOS类目Remote Sensing
WOS研究方向Remote Sensing
来源机构Colorado State University
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/174789
作者单位1.Colorado State Univ, Dept Civil & Environm Engn, Ft Collins, CO 80523 USA;
2.Colorado State Univ, Dept Soil & Crop Sci, Ft Collins, CO 80523 USA
推荐引用方式
GB/T 7714
Taghvaeian, Saleh,Chavez, Jose L.,Hansen, Neil C.. Infrared Thermometry to Estimate Crop Water Stress Index and Water Use of Irrigated Maize in Northeastern Colorado[J]. Colorado State University,2012,4(11):3619-3637.
APA Taghvaeian, Saleh,Chavez, Jose L.,&Hansen, Neil C..(2012).Infrared Thermometry to Estimate Crop Water Stress Index and Water Use of Irrigated Maize in Northeastern Colorado.REMOTE SENSING,4(11),3619-3637.
MLA Taghvaeian, Saleh,et al."Infrared Thermometry to Estimate Crop Water Stress Index and Water Use of Irrigated Maize in Northeastern Colorado".REMOTE SENSING 4.11(2012):3619-3637.
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