| DEVELOPMENT AND APPLICATION OF AN EFFICIENT METHOD TO RIVER DISCHARGE MEASUREMENT |
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| 作者姓名： | Chuan-Yi WANG Jau-Yau LU and Chih-Chiang SU Associate professor Dept. of Hydraulic Engrg. Feng-Chia University Taichung Taiwan China. E-mail: cywang@fcu.edu.tw Professor Dept. of Civil Engrg. National Chung-Hsing University Taichung |
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| 作者单位： | Chuan-Yi WANG1，Jau-Yau LU2 and Chih-Chiang SU3 1 Associate professor，Dept. of Hydraulic Engrg.，Feng-Chia University，Taichung，Taiwan，China. E-mail: cywang@fcu.edu.tw 2 Professor，Dept. of Civil Engrg.，National Chung-Hsing University，Taichung |
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| 摘 要： | 1 INTRODUCTION There are 129 rivers in Taiwan. Most of them are short and steep with small drainage basins and rapid flows. Heavy rains and flood flows usually carry large amount of sediment. The specific peak discharge (peak discharge per unit drainage area) in Taiwan has the highest value in the world. For example, the specific peak discharge of Wu River in central Taiwan is 10.5 cms/km2, which is about 618 times that of Yangtze River in China and 35 times that of Sinno River i…
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DEVELOPMENT AND APPLICATION OF AN EFFICIENT METHOD TO RIVER DISCHARGE MEASUREMENT |
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| Chuan-Yi WANG,Jau-Yau LU and Chih-Chiang SU Associate professor,Dept. of Hydraulic Engrg.,Feng-Chia University,Taichung,Taiwan,China. E-mail: cywang@fcu.edu.tw Professor,Dept. of Civil Engrg.,National Chung-Hsing University,Taichung.DEVELOPMENT AND APPLICATION OF AN EFFICIENT METHOD TO RIVER DISCHARGE MEASUREMENT[J].International Journal of Sediment Research,2002,17(2). |
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| Authors: | Chuan-Yi WANG Jau-Yau Lu Chih-Chiang SU |
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| Abstract: | A highly efficient flow discharge measuring method was proposed in this study. Either the traditional velocimeters or the Acoustic Doppler Profiler (ADP) can be used to measure the maximum flow velocity, Umax at the y-axis (vertical passing through the maximum point velocity in a channel cross section). The mean velocity of the cross section (U) was computed by φUmax, where φ was estimated from the field data collected with the cup-type current meter using the "two-point method".The flow discharge was then computed by multiplying the estimated flow area with (U). In contrast to the traditional method, where flow depth and flow velocity measurements are needed for each vertical, the proposed method has the advantages of short operation time and high accuracy. These features are especially important for the measurement of unsteady flow. |
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| Keywords: | Discharge measurement Doppler effect Depth cell y-axis One-seventh power law |
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