Estimation of discharges at river mouth with MODIS image
Estimation of discharges at river mouth with MODIS image
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DOI：
10.1016/j.jag.2012.06.008
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发表时间：
2013-04
期刊：
影响因子：
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通讯作者：
Kohei Hashimoto;K. Oki
中科院分区：
文献类型：
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作者：
Kohei Hashimoto;K. Oki
水携带悬浮的沉积物的运输是水文学和河流漫滩和三角洲生态功能的核心。河流流量估算可用于说明这一信息。在这项研究中，我们提取MODIS反射率值从一个像元附近的河口进行简单的大气校正方法后，然后应用一元回归分析反射率值和在德岛县的纳卡河和高知县的Monobe河，日本的原位流量。中分辨率成像光谱仪图像和现场数据，从2004年1月至12月。结果表明，在纳卡川和藻部川，全年河口地区的实测流量与遥感MODIS反射率数据之间均存在显著的正相关关系。此外，还利用回归公式估算了月平均流量和年平均流量。因此，原位平均流量得到了很好的估计。
The transport of the sediment, carried in suspension by water, is central to hydrology and the ecological functioning of river floodplains and deltas. River discharge estimation is useful for demonstrating this information. In this study, we extracted MODIS reflectance values from a pixel near the river mouth after carrying out the simple atmospheric correction method, then applied single regression analysis to reflectance values and the in situ discharge of Naka River in Tokushima prefecture and Monobe River in Kochi prefecture, Japan. MODIS images and in situ data were taken from January through December, 2004. As a result, both in Naka River and Monobe River, robustly positive relationships between the discharges observed in situ and remotely sensed MODIS reflectance data in the region of river mouth were found throughout the year. In addition, we estimated monthly and annual average discharge from the MODIS reflectance with the regression formula. As a result, in situ average discharge was well estimated.