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首页> 外文期刊>Journal of hydroscience and hydraulic engineering >COUPLING A HYDRAULIC MODEL INCORPORATING RIVER CROSS-SECTIONAL GEOMETRY DERIVED FROM HIGH RESOLUTION DSM WITH A HYDROLOGICAL MODEL FOR RIVER DISCHARGE ESTIMATION
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COUPLING A HYDRAULIC MODEL INCORPORATING RIVER CROSS-SECTIONAL GEOMETRY DERIVED FROM HIGH RESOLUTION DSM WITH A HYDROLOGICAL MODEL FOR RIVER DISCHARGE ESTIMATION

机译：将包含高分辨率DSM得出的河道横断面几何的水力模型与河道流量估算的水文模型耦合

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摘要

A variety of hydraulic information can be obtained from space nowadays, which are potentially useful for river discharge estimation. In this study, river cross-sectional geometry was extracted from high resolution Digital Surface Model (DSM) which is produced from ALOS PRISM images. Then the derived information was integrated with Manning Equation to describe the relation between discharge and cross-sectional water surface width. By integrating a rainfall-runoff model with this relation which is used to describe hydraulic relation at basin outlet, it is possible to calibrate the rainfall-runoff model using satellite observations of river width. Such methodology is demonstrated by means of a case study in the Mekong River at Pakse. The results show that discharge is estimated with acceptable accuracy and values of the hydraulic relation parameters obtained from calibration properly reflect hydraulic condition at Pakse region. The method proposed in this study could be an effective approach for estimating discharge in large ungauged basins.
机译：如今，可以从太空中获得各种水力信息，这些信息可能对河流流量的估算很有用。在这项研究中，河流剖面的几何形状是从ALOS PRISM图像产生的高分辨率数字表面模型（DSM）中提取的。然后将导出的信息与曼宁方程相结合，以描述流量与横截面水面宽度之间的关系。通过将降雨径流模型与用于描述流域出口水力关系的这种关系相结合，可以使用卫星对河流宽度的观测值来校准降雨径流模型。通过在巴色湄公河的案例研究证明了这种方法。结果表明，以合理的精度估算了流量，并且通过校准获得的水力关系参数值正确反映了巴色地区的水力状况。在这项研究中提出的方法可能是一种有效的方法来估算大型非流域盆地的流量。

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    Wenchao Sun; Hiroshi Ishidaira; Satish Bastola;

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    Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Japan;

    Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Japan;

    National University of Ireland, Maynooth, Co. Kildare, Ireland;

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