A comparison of three methods for determining vineyard evapotranspiration in the and desert regions of northwest China
文献类型：SCI/SSCI论文
| 作者 | Zhang L.; Zhang L. |
| 发表日期 | 2008 |
| 关键词 | arid region Bowen ratio-energy balance eddy covariance evapotranspiration field water balance northwest China vineyard energy-balance closure latent-heat flux frequency-response corrections bowen-ratio eddy-covariance deciduous forest sensible heat water-vapor measurement systems net-radiation |
| 英文摘要 | Accurate measurement and estimation of crop evapotranspiration (ET) plays in important in understanding field soil water cycle and managing water-saving irrigation in the arid regions. This study compares three methods for estimating, ET: field Water Balance (WB), Eddy Covariance (EC) and Bowen Ratio-Energy Balance (BREB). The experiment was conducted in a vineyard in the arid desert regions of northwest China. Results indicate that the three methods provided similar estimate of total ET. Compared to total ET estimated by WB (ET(WB)) during the whole growing stage, total ET estimated by EC (ET(EC)) was 1.57% lower, and total ET estimated by BREB (ET(BREB)) was 5-19% higher. Variations of ET(EC) and ET(BREB) are similar at hourly or daily timescale, but the values are slightly different. At sunrise or sunset, ET(BREB) increases or decreases more rapidly than ET(EC). The difference between ET(BREB) and ET(EC) is linearly related to the residual of the energy balance for EC and the two methods yielded close estimates when the residual was small. This study showed that the three methods provided accurate estimates of ET at daily and seasonal timescales and the methods can be used to estimate ET from vineyards in arid environments. Copyright (C) 2008 John Wiley & Sons, Ltd. |
| 出处 | Hydrological Processes |
| 卷 | 22 |
| 期 | 23 |
| 页 | 4554-4564 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0885-6087 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/23621]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Zhang L.,Zhang L.. A comparison of three methods for determining vineyard evapotranspiration in the and desert regions of northwest China. 2008. |
入库方式： OAI收割
来源：地理科学与资源研究所
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