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River discharge estimation through MODIS data

机译：通过MODIS数据估算河流流量

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摘要

River discharge is an important quantity of the hydrologic cycle because it is essential for both scientific and operational applications related to water resources management and flood risk prevention. Streamflow measurements are sparse and for few sites along natural channels and, hence, they are not able to detect adequately the complexity of variation in surface water systems. Therefore, in recent years, the possibility to obtain river discharge estimates through remote sensing monitoring has received a great interest. In this context, the capability of the MODerate resolution Imaging Spectroradiometer (MODIS) for river discharge estimation is investigated here. Thanks to a very short revisiting time interval and a moderate spatial resolution (up to 250 m), MODIS has a significant potential for mapping flooded area extent and flow dynamics. Specifically, for the estimation of river discharge, the ratio of the MODIS channel 2 reflectance values between two pixels located within and outside the river is used. Time series of daily discharge between 2006 and 2010 measured at two gauging stations located along the Upper Tiber River basin (central Italy) are employed to test the procedure. The agreement between MODIS-derived and in situ discharge time series is found to be fairly good with correlation coefficient values close to 0.8.
机译：河流流量是水文循环的重要部分，因为它对于与水资源管理和洪水风险预防相关的科学和运营应用都是必不可少的。流量测量稀疏且沿自然通道的位置很少，因此，它们无法充分检测地表水系统变化的复杂性。因此，近年来，通过遥感监视获得河流流量估计值的可能性引起了极大的兴趣。在此背景下，本文研究了中等分辨率成像光谱仪（MODIS）进行河流流量估算的能力。由于重新访问的时间间隔非常短，并且空间分辨率适中（最高250 m），因此MODIS在绘制洪水区域范围和流量动态方面具有巨大的潜力。具体地，为了估算河流流量，使用位于河流内外的两个像素之间的MODIS通道2反射率值之比。该程序使用2006年至2010年在位于台伯河上游流域（意大利中部）的两个计量站测得的日排放时间序列进行测试。发现MODIS衍生的和原位放电时间序列之间的一致性非常好，相关系数值接近0.8。

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  • 来源
  • 会议地点 Prague(CZ)
  • 作者

    Angelica Tarpanelli; Luca Brocca; Teodosio Lacava; Mariapia Faruolo; Florisa Melone; Tommaso Moramarco; Nicola Pergola; Valerio Tramutoli;

  • 作者单位

    Research Institute for Geo-Hydrological Protection, National Research Council, Perugia, Italy;

    Research Institute for Geo-Hydrological Protection, National Research Council, Perugia, Italy;

    Institute of Methodologies for Environmental Analysis, National Research Council, Tito Scalo (PZ), Italy,Department of Engineering and Physics of the Environment (DIFA), University of Basilicata, Potenza, Italy;

    Institute of Methodologies for Environmental Analysis, National Research Council, Tito Scalo (PZ), Italy;

    Research Institute for Geo-Hydrological Protection, National Research Council, Perugia, Italy;

    Research Institute for Geo-Hydrological Protection, National Research Council, Perugia, Italy;

    Institute of Methodologies for Environmental Analysis, National Research Council, Tito Scalo (PZ), Italy,Department of Engineering and Physics of the Environment (DIFA), University of Basilicata, Potenza, Italy;

    Department of Engineering and Physics of the Environment (DIFA), University of Basilicata, Potenza, Italy,Institute of Methodologies for Environmental Analysis, National Research Council, Tito Scalo (PZ), Italy;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境遥感;
  • 关键词

    MODIS; discharge; remote sensing; flow velocity;

    机译：MODIS;排出;遥感;流速;

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