Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.3390/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
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ISSN | 2072-4292 |
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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