| 基于能量平衡的关川河流域蒸散发的遥感反演 |
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| 引用本文： | 李守波,赵传燕.基于能量平衡的关川河流域蒸散发的遥感反演[J].遥感技术与应用,2006,21(6):521-526. |
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| 作者姓名： | 李守波 赵传燕 |
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| 作者单位： | (1. 兰州大学西部环境教育部重点实验室, 甘肃兰州 730000; 2. 中国科学院寒区旱区环境与工程研究所寒旱区水土资源研究室, 甘肃兰州 730000) |
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| 基金项目： | 教育部重大项目(10425) |
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| 摘 要： | 蒸散发是水分循环的重要环节, 遥感技术为区域陆面水分蒸散发量估算提供了一种新的手段, 使用TM 数据和能量平衡模式估算流域蒸散发, 并给出了各个参量的遥感获取方法, 解决了由瞬时遥感数据估算全天蒸散发的问题。通过对关川河流域日蒸散发的模拟, 分析了该流域蒸散发的分布规律, 对陆面过程研究有一定的支持和指导意义。
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| 关 键 词： | ,蒸散发,遥感,能量平衡,,关川河流域, |
| 文章编号： | 1004-0323(2006)06-0521-06 |
| 收稿时间： | 2005-11-10 |
| 修稿时间： | 2005年11月10 |
Estimating Evapotran spiration Based on Energy Balance in Guanchuan River Basin Using Remote Sensing |
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| LI Shou-bo,ZHAO Chuan-yan.Estimating Evapotran spiration Based on Energy Balance in Guanchuan River Basin Using Remote Sensing[J].Remote Sensing Technology and Application,2006,21(6):521-526. |
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| Authors: | LI Shou-bo ZHAO Chuan-yan |
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| Affiliation: | (1. National Laboratory of Western China’s Environmental System , Lanzhou University ,Lanzhou 730000, China; 2. The State Key Lab. of Frozen Soil Eng., Cold and Arid Region Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou , 730000, China) |
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| Abstract: | The method used in the study is based on surface energy balance equation, i. e. R n= KE T + H +G. By analyzing the spatial distribution of ET , we can draw that the spatial variation of ET is obvious.The estimated ET value ranges from 1. 2 to 8. 5mm , with the average value of 4. 7mm on April 15, 2000.Spatially, it increased from north to south. The highest value is occurred at the source of the river, where is woodland distributing. The results have been validated by field data, and the root meansquare error (RMSE) is 0. 8. The errors are less than 0. 7mm in most of the stations except one. It proved that the method is feasible to estimate ET in the study area. The study enables us to better predict land surface hydrological cycle and lays a foundation for ecological restoration and application of distributed hydrologic model. |
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| Keywords: | Evapotranspiration(ET) Remote sensing Surface energy balance Guanchuan river basin |
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