Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s12517-016-2469-8 |
Evaluation of METRIC-derived ET fluxes over irrigated alfalfa crop in desert conditions using scintillometer measurements | |
Al-Gaadi, K. A.1,2; Patil, V. C.1,3; Tola, E.1; Madugundu, R.1; Gowda, P. H.4 | |
通讯作者 | Madugundu, R. |
来源期刊 | ARABIAN JOURNAL OF GEOSCIENCES |
ISSN | 1866-7511 |
EISSN | 1866-7538 |
出版年 | 2016 |
卷号 | 9期号:6 |
英文摘要 | A field study on a 50-ha alfalfa (Medicago sativa L.) irrigated field was conducted to investigate the performance of the remote sensing (RS) based Mapping EvapoTranspiration at high Resolution with Internalized Calibration (METRIC) model in the estimation of evapotranspiration (ET) under the arid conditions of Saudi Arabia. The METRIC model performance was investigated by comparing the energy fluxes estimated by the model to the output of a surface layer scintillometer (SLS) system installed in the field, given the fact that the SLS is efficient in measuring sensible heat fluxes (H) over vegetative areas. Landsat-8 reflectance data were used as inputs for the METRIC model. Results of the study revealed that the H-METRIC data was strongly correlated with the H-SLS data with an R-2 value of 0.74 (P > F = 0.0064) and a mean bias error (MBE) of 6.05 W m(-2) (6 %). The METRIC model showed a good performance in estimating the hourly latent heat (LE) fluxes compared with SLS data with an R2 value of 0.81 (P > F = 0.0023), an MBE of 24.46 W m(-2) (8 %) and a Nash-Sutcliffe efficiency (NSE) of 0.91. Furthermore, the hourly ET was estimated with an MBE and an NSE of 0.036 mm h(-1) (8 %) and 1.00, respectively. Compared to the SLS data, the METRIC model was found to generally provide an efficient and an accurate means of energy fluxes estimation; therefore, ET estimation over the studied irrigated alfalfa crop. |
英文关键词 | Centre pivot system Evapotranspiration Landsat-8 data Alfalfa field Surface layer scintillometer |
类型 | Article |
语种 | 英语 |
国家 | Saudi Arabia ; Australia ; USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000376611000015 |
WOS关键词 | LARGE-APERTURE SCINTILLOMETER ; SURFACE-ENERGY BALANCE ; SENSIBLE HEAT-FLUX ; MAPPING EVAPOTRANSPIRATION ; TEMPERATURE ; MODELS ; AREA ; SCINTILLATION ; UNCERTAINTY ; CALIBRATION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
来源机构 | King Saud University |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/191435 |
作者单位 | 1.King Saud Univ, Precis Agr Res Chair, Riyadh, Saudi Arabia; 2.King Saud Univ, Coll Food & Agr Sci, Dept Agr Engn, Riyadh, Saudi Arabia; 3.Edith Cowan Univ, Electron Sci Res Inst, Joondalup, Australia; 4.USDA ARS, Forage & Livestock Prod Res Unit, Grazing Lands Res Lab, El Reno, OK USA |
推荐引用方式 GB/T 7714 | Al-Gaadi, K. A.,Patil, V. C.,Tola, E.,et al. Evaluation of METRIC-derived ET fluxes over irrigated alfalfa crop in desert conditions using scintillometer measurements[J]. King Saud University,2016,9(6). |
APA | Al-Gaadi, K. A.,Patil, V. C.,Tola, E.,Madugundu, R.,&Gowda, P. H..(2016).Evaluation of METRIC-derived ET fluxes over irrigated alfalfa crop in desert conditions using scintillometer measurements.ARABIAN JOURNAL OF GEOSCIENCES,9(6). |
MLA | Al-Gaadi, K. A.,et al."Evaluation of METRIC-derived ET fluxes over irrigated alfalfa crop in desert conditions using scintillometer measurements".ARABIAN JOURNAL OF GEOSCIENCES 9.6(2016). |
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