| 摘要: |
| 蒸散发在地表水分循环和能量平衡中具有重要作用,其估算方法研究一直是人们关心的热点问题.文章在对能量平衡、水分平衡、互补相关理论及土壤-植被-大气传输模型的多种蒸散发估算方法分析的基础上,就估算蒸散发的各种方法的优缺点进行了分析;详细讨论了遥感技术用于蒸散发计算的统计模型、物理模型和全遥感信息模型,以及国内在能量平衡余项法、SEBAL模型、SEBS模型等方面取得的研究进展.结果表明,遥感技术在区域蒸散的估算方面具有其他方法不可比拟的优点,虽然遥感技术用于区域蒸散在模型研建和检验、尺度外推、反演精度等方面还存在问题,但遥感技术仍然是解决区域蒸散估算的重要方向. |
| 关键词: 遥感技术 农田蒸散 区域蒸散 蒸散量估算 |
| DOI： |
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| 基金项目:国家自然科学基金项目（40871190;40801126） |
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| Utilization of remote sensing for regional field evapotranspiration estimation |
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| Abstract: |
| Evapotranspiration has an important role in the water and energy balance and circulation.The method of estimation evapotranspiration is a hot issue for research workers.Based on the theory of energy balance、water balance and complementary relationship and soil-vegetation-atmosphere transferation model,many methods of estimating evapotranspiration have been developed.This paper analysed the advantages and disadvantages of these methods,discussed in detail the models including statistical and empirical model,physical model and remote sensing information model by using remote sensing technology to calculate evapotranspiration at regional scale.The paper also demonstrated the research progress of some models,such as residual item of energy balance equation, surface energy balance algorithm for land(SEBAL),surface energy balance system(SEBS) in China.The results show remote sensing technology has its special advantages on estimation evapotranspiration at regional scale.Although such problems，as making models at regional scale,evaluation of model applicability，temporal and spatial resolution with relative scale extension,accuracy assessment and so on exist,the utilization of remote sensing for regional evapotranspiration estimation is still an important trend. |
| Key words: remote sensing technology field evapotranspiration regional evapotranspiration evapotranspiration estimation |
