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Choo, T.H., Maeng, S.J., Yoon, H.C., Kim, D.M., Kim, S.C.. (1391). A Study on the Derivation of a Mean Velocity Formula from Chiu’s Velocity Formula and Bottom Shear Stress. , 6(2), 537-546. doi: 10.22059/ijer.2012.523
T.H. Choo; S.J. Maeng; H.C. Yoon; D.M. Kim; S.C. Kim. "A Study on the Derivation of a Mean Velocity Formula from Chiu’s Velocity Formula and Bottom Shear Stress". , 6, 2, 1391, 537-546. doi: 10.22059/ijer.2012.523
Choo, T.H., Maeng, S.J., Yoon, H.C., Kim, D.M., Kim, S.C.. (1391). 'A Study on the Derivation of a Mean Velocity Formula from Chiu’s Velocity Formula and Bottom Shear Stress', , 6(2), pp. 537-546. doi: 10.22059/ijer.2012.523
Choo, T.H., Maeng, S.J., Yoon, H.C., Kim, D.M., Kim, S.C.. A Study on the Derivation of a Mean Velocity Formula from Chiu’s Velocity Formula and Bottom Shear Stress. , 1391; 6(2): 537-546. doi: 10.22059/ijer.2012.523

A Study on the Derivation of a Mean Velocity Formula from Chiu’s Velocity Formula and Bottom Shear Stress

International Journal of Environmental Research
مقاله 21، دوره 6، شماره 2، تیر 2012، صفحه 537-546    اصل مقاله (612.5 K)
نوع مقاله: Original Research Paper
شناسه دیجیتال (DOI): 10.22059/ijer.2012.523
نویسندگان
T.H. Choo* 1؛ S.J. Maeng2؛ H.C. Yoon1؛ D.M. Kim1؛ S.C. Kim1
1Department of Civil engineering, Pusan National University, Jangjeon-dong, Geumjeong-gu, Busan, 609-735, South Korea
2Chungbuk National University, Jangjeon-dong, Geumjeong-gu, South Korea
چکیده
This study proposed a new discharge estimation method using a mean velocity formula derived
from Chiu’s 2D velocity formula of probabilistic entropy concept and the river bed shear stress of channel. In particular, we could calculate the mean velocity, which is hardly measurable in flooding natural rivers, in consideration of several factors reflecting basic hydraulic characteristics such as river bed slope, wetted perimeter, width, and water level that are easily obtainable from rivers. In order to test the proposed method, we used highly reliable flow rate data measured in the field and published in SCI theses, estimated entropy M from the results of the mean velocity formula and, at the same time, calculated the maximum velocity. In particular, we obtained φ(M ) expressing the overall equilibrium state of river through regression analysis between the maximum velocity and the mean velocity, and estimated the flow rate from the newly proposed
mean velocity formula. The relation between estimated and measured discharge was analyzed through the discrepancy ratio, and the result showed that the estimate value was quite close to the measured data.
کلیدواژه‌ها
Hydraulic characteristics؛ Mean velocity formula؛ F(M) Equation؛ Entropy parameter M؛ Equilibrium state φ(M )
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