Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.3390/s17102350 |
Evaluation of Sensible Heat Flux and Evapotranspiration Estimates Using a Surface Layer Scintillometer and a Large Weighing Lysimeter | |
Moorhead, Jerry E.1; Marek, Gary W.1; Colaizzi, Paul D.1; Gowda, Prasanna H.2; Evett, Steven R.1; Brauer, David K.1; Marek, Thomas H.3; Porter, Dana O.4 | |
通讯作者 | Moorhead, Jerry E. |
来源期刊 | SENSORS
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ISSN | 1424-8220 |
出版年 | 2017 |
卷号 | 17期号:10 |
英文摘要 | Accurate estimates of actual crop evapotranspiration (ET) are important for optimal irrigation water management, especially in arid and semi-arid regions. Common ET sensing methods include Bowen Ratio, Eddy Covariance (EC), and scintillometers. Large weighing lysimeters are considered the ultimate standard for measurement of ET, however, they are expensive to install and maintain. Although EC and scintillometers are less costly and relatively portable, EC has known energy balance closure discrepancies. Previous scintillometer studies used EC for ground-truthing, but no studies considered weighing lysimeters. In this study, a Surface Layer Scintillometer (SLS) was evaluated for accuracy in determining ET as well as sensible and latent heat fluxes, as compared to a large weighing lysimeter in Bushland, TX. The SLS was installed over irrigated grain sorghum (Sorghum bicolor (L.) Moench) for the period 29 July-17 August 2015 and over grain corn (Zea mays L.) for the period 23 June-2 October 2016. Results showed poor correlation for sensible heat flux, but much better correlation with ET, with r(2) values of 0.83 and 0.87 for hourly and daily ET, respectively. The accuracy of the SLS was comparable to other ET sensing instruments with an RMSE of 0.13 mmh(-1) (31%) for hourly ET; however, summing hourly values to a daily time step reduced the ET error to 14% (0.75 mmd(-1)). This level of accuracy indicates that potential exists for the SLS to be used in some water management applications. As few studies have been conducted to evaluate the SLS for ET estimation, or in combination with lysimetric data, further evaluations would be beneficial to investigate the applicability of the SLS in water resources management. |
英文关键词 | irrigation energy balance water management semi-arid regions |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000414931500192 |
WOS关键词 | LARGE-APERTURE SCINTILLOMETER ; BALANCE CLOSURE PROBLEM ; HETEROGENEOUS LAND-SURFACE ; TEXAS HIGH-PLAINS ; ENERGY-BALANCE ; EDDY-COVARIANCE ; LATENT-HEAT ; MAPPING EVAPOTRANSPIRATION ; ADVECTIVE ENVIRONMENT ; BOUNDARY-LAYER |
WOS类目 | Chemistry, Analytical ; Engineering, Electrical & Electronic ; Instruments & Instrumentation |
WOS研究方向 | Chemistry ; Engineering ; Instruments & Instrumentation |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/202419 |
作者单位 | 1.ARS, USDA, Conservat & Prod Res Lab, PO Drawer 10, Bushland, TX 79012 USA; 2.ARS, USDA, Grazinglands Res Lab, 7207 West Cheyenne St, El Reno, OK 73036 USA; 3.Texas A&M AgriLife Res, 6500 Amarillo Blvd W, Amarillo, TX 79106 USA; 4.Texas A&M AgriLife Extens Serv, 1102 E FM 1294, Lubbock, TX 79403 USA |
推荐引用方式 GB/T 7714 | Moorhead, Jerry E.,Marek, Gary W.,Colaizzi, Paul D.,et al. Evaluation of Sensible Heat Flux and Evapotranspiration Estimates Using a Surface Layer Scintillometer and a Large Weighing Lysimeter[J],2017,17(10). |
APA | Moorhead, Jerry E..,Marek, Gary W..,Colaizzi, Paul D..,Gowda, Prasanna H..,Evett, Steven R..,...&Porter, Dana O..(2017).Evaluation of Sensible Heat Flux and Evapotranspiration Estimates Using a Surface Layer Scintillometer and a Large Weighing Lysimeter.SENSORS,17(10). |
MLA | Moorhead, Jerry E.,et al."Evaluation of Sensible Heat Flux and Evapotranspiration Estimates Using a Surface Layer Scintillometer and a Large Weighing Lysimeter".SENSORS 17.10(2017). |
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