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Evapotranspiration estimate from water balance closure using satellite data for the Upper Yangtze River basin

机译：长江上游流域利用卫星数据进行水量平衡估算得出的蒸散量

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摘要

Application of hydrological models for water resources management at large continental river basins is often limited by the scarcity of in situ meteorological forcing data. Remote sensing information provides an alternative to in situ data, with observations that are, in some cases, at higher spatial and temporal resolutions than those available from traditional ground sources. In this work, the water balance equation is solved using precipitation retrieved from Tropical Rainfall Measuring Mission, water storage from Gravity Recovery and Climate Experiment satellite data and ground discharge. Evapotranspiration (ET) is then computed as a residual term of the water balance. Satellite data are compared with ground data to understand to what extent remote sensing observations can be used to improve estimates of the terrestrial water balance at regional scale. ET estimates are also compared with the ET computed from a detailed distributed energy water balance model and with the ET product from the Moderate Resolution Imaging Spectroradiometer Global Evapotranspiration Project. These analyses are performed for the Upper Yangtze River basin (China) in the framework of NRSCC-ESA DRAGON-2 Programme.
机译：水文模型在大型大陆河流域的水资源管理中的应用通常受到现场气象强迫数据缺乏的限制。遥感信息为实地数据提供了一种替代方法，其观测在某些情况下具有比传统地面资源更高的时空分辨率。在这项工作中，使用从热带雨量测量团获得的降水量，从重力恢复和气候实验卫星数据中获得的储水量以及地面流量来求解水平衡方程。然后，计算出蒸散量（ET）作为水平衡的剩余项。将卫星数据与地面数据进行比较，以了解在多大程度上可以使用遥感观测来改进区域尺度上陆地水平衡的估算。 ET估计值也与通过详细的分布式能量水平衡模型计算出的ET以及中分辨率成像光谱仪全球蒸发蒸腾项目中的ET产品进行了比较。这些分析是在NRSCC-ESA DRAGON-2计划的框架内对长江上游流域（中国）进行的。

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  • 来源
    《Nordic hydrology》 |2014年第5期|603-614|共12页
  • 作者

    C. Corbari; M. Mancini; Z. Su; J. Li;

  • 作者单位

    Politecnico di Milano,Piazza Leonardo da Vinci 32,20133, Milano,Italy;

    Politecnico di Milano,Piazza Leonardo da Vinci 32,20133, Milano,Italy;

    University of Twente,Hengelosestraat 99,7514 AE Enschede,The Netherlands;

    China Institute of Water Resources and Hydropower Research,5 Summer Palace Road,Beijing,China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    evapotranspiration; remote sensing; water balance;

    机译：蒸散遥感;水平衡;

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