| 蒸散量测定与估算方法的对比研究 |
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| 引用本文： | 刘绍民,孙中平,李小文,刘昌明.蒸散量测定与估算方法的对比研究[J].自然资源学报,2003,18(2):161-167. |
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| 作者姓名： | 刘绍民 孙中平 李小文 刘昌明 |
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| 作者单位： | 1. 北京师范大学遥感与GIS研究中心, 资源与环境科学系, 北京 100875;
2. 北京师范大学环境科学研究所, 北京 100875;
3. 中国科学院地理科学与资源研究所, 北京 100101 |
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| 基金项目： | 国家自然科学基金项目(40201038)，国家重点基础研究规划项目(G20000779)和(G1999043601)。 |
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| 摘 要： | 以涡度相关法的实测资料为标准,对波文比-能量平衡法、空气动力学法、Penman-Monteith模型、Shuttleworth-Wallace模型进行对比研究,并分析了各种方法的精度和灵敏度。结果表明:Penman-Monteith模型和波文比-能量平衡法的精度最高,Shuttleworth-Wallace模型和空气动力学法的精度较差。Penman-Monteith模型的稳定性较好,波文比-能量平衡法受Δe和ΔT观测精度的影响大,风温湿观测高度以及下垫面是否均一对空气动力学法影响较大,Shuttleworth-Wallace模型对各类阻抗较为敏感。
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| 关 键 词： | 蒸散量 测定与估算 对比研究 精度 灵敏度 |
| 文章编号： | 1000-3037(2003)02-0161-07 |
| 收稿时间： | 2002-10-20 |
| 修稿时间： | 2002年10月20 |
A comparative study on models for estimating evapotranspiration |
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| LIU Shao-min,SUN Zhong-ping,LI Xiao-wen,LIU Chang-ming.A comparative study on models for estimating evapotranspiration[J].Journal of Natural Resources,2003,18(2):161-167. |
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| Authors: | LIU Shao-min SUN Zhong-ping LI Xiao-wen LIU Chang-ming |
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| Institution: | 1. Research Center for Remote Sensing and GIS, Department of Geography, Beijing Normal University, Beijing 100875, China;
2. Institute of Environmental Sciences, Beijing Normal University, Beijing 100875, China;
3. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China |
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| Abstract: | Based on the observational data of eddy correlation method,we validate some methods for estimating latent heat flux,which include Bowen-ratio method,aerodynamics method,Penman-Monteith model and Shuttleworth-Wallace model.Analysis of the performance and sensitivity of these models shows that Penman -Monteith model and Bowen -ratio method are the best in performance,while Shuttleworth-Wallace model and aerodynamics method are the worst.Penman-Monteith model is not sensitive to the uncertainty in these model parameters.The measured precision ofΔe andΔT affect the performance of Bowen -ratio method greatly,while the observation height of wind,temperature,humidity and heterogeneous surfaces affect the performance of aerodynamics method greatly.Shuttleworth-Wallace model is sensitive to surface resistances. |
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| Keywords: | evapotranspiration measurement and estimation comparative study performance sensitivity |
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