Seite - 425 - in Book of Full Papers - Symposium Hydro Engineering
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Text der Seite - 425 -
𝑆
𝑏 = 𝐵
𝐷
𝑈 √𝑔
𝐶 𝑒 [ −0.27Δ𝛾
𝑠 𝑑
𝛾 𝜏
𝑐 {1+0.5(
𝜉
𝑈 𝑏
𝑈 )
2
}
] (7)
G. Bagnold-Bailard Equation: Bagnold (1960, 1966) developed an approach
to bed load transport prediction that is based on stream power per unit
channel width
Average velocity (U) can be given by
𝑈 =𝑢 𝑐 +𝑢 𝑡 (8)
where uc = fluid velocity due to current effect (m/s)
ut = Orbital fluid velocity above the bed at time t (m/s)
assume uc = U, then bed load transport Sb is related to IUI2U
𝑆
𝑏 (𝑡 )= 𝜏 0
[1− 𝜌
𝑓
𝜌
𝑠 ] { 𝑒
𝑏
𝑡 𝑎 𝑛
𝛼 +𝑒
𝑠 (1−𝑒
𝑏 ) ?̅?
𝜔
0 } (9)
the suspended load transport Ss is related to IUI3U and computed from
𝑆
𝑠 (𝑡 )= 𝜏 0𝑈
[1− 𝜌
𝑓
𝜌
𝑠 ] { 𝑒
𝑠
𝑡 𝑎 𝑛
𝛼 +𝑒
𝑠 (1−𝑒
𝑠 ) ?̅?
𝜔
0 } (10)
The Bijiker model predicts too small concentration magnitudes and too large fluid
velocities in the near bed zone. These results in current related sediment
transport rates that are 4 times for small transports (<0.001Kg/ms) and 4 times
large transports.The evaluation of sediment transport based on above methods
except Bijker and Bagnold is given in table2.
Table:1. Prediction of Sediment by Investigators
S
No. Investigators Predicted
Sediment
ton
1. Camenen and Larson Method 1194604.32
2. Engelund and Hansen Method 756025.46
3. Ackers and White’s Method 600278.89
4. Meyer-Peter and Muller Method 445292.83
425
Book of Full Papers
Symposium Hydro Engineering
- Titel
- Book of Full Papers
- Untertitel
- Symposium Hydro Engineering
- Autor
- Gerald Zenz
- Verlag
- Verlag der Technischen Universität Graz
- Ort
- Graz
- Datum
- 2018
- Sprache
- englisch
- Lizenz
- CC BY-NC-ND 4.0
- ISBN
- 978-3-85125-620-8
- Abmessungen
- 20.9 x 29.6 cm
- Seiten
- 2724
- Schlagwörter
- Hydro, Engineering, Climate Changes
- Kategorien
- International
- Naturwissenschaften Physik
- Technik