Hydraulic Structures: Fourth Edition

SELECTION OF CREST HEIGHT, P Large heights are uneconomical and create upstream flooding, whereas small heights create frequent ...

WORKED EXAMPLES 357 Fig. 8.24 log(hz) versus logQ Figure 8.21 suggests that the maximum stage before overtopping of banks occ ...

Combining the above gives  1 2 C^2 d[(b/B)(h 1 /(h 1 P))]^2 C^2 v Cv2/3 1 0. (vi) The solution of this equation – tabular o ...

h 1 (m) Cv Q (m^3 s^1 ) 0.10 1.003 0.62 0.20 1.009 1.78 0.30 1.018 3.30 0.38 ←by iteration ← 4.60 NON-MODULAR FLOW RATING CURVE ...

Note that the proposed weir can only be used as a gauging structure for up to 17 m^3 s^1 (Fig. 8.25) with a return period of 10 ...

Cunge, J.A. (1969) On the subject of flood propagation computation method (Muskingum method). Journal of Hydraulic Research, 7 ( ...

development.Journal of the Institution of Water and Environmental Manage- ment, 4: 163–75. Knight, D.W. et al.(1999) The respons ...

Water Resources Board (1970) Crump Weir Design, Technical Note TN8, Water Resources Board, Reading. WMO (1980) Manual on Streamf ...

Chapter 9 Diversion works 9.1 Weirs and barrages; worked examples 9.1.1 General Weirs and barrages are relatively low-level dams ...

9.1.2 Cofferdams Cofferdams are temporary structures used to divert water from an area where a permanent structure has to be con ...

9.1.3 Barrage components (a) Guide banks Guide banks direct the main river flow as centrally as possible to the diver- sion stru ...

submerged flows below the gate. For completely raised gates, Table 8.1 for free flow and Table 9.1 for submerged flow conditions ...

cylindrical shape with a smooth upstream and downstream transition (typ- ically a sloping apron with a slope 1 : 2 to 1 : 2.25). ...

The sloping surface downstream of the weir crest (glacis) and its transition into the stilling basin should be designed so that ...

whereLis the total creep length equal to 2d 1 b 2 d 2 ,d 1 andd 2 being the depths of the upstream and downstream cut-off pile ...

Safety against uplift pressure (Fig. 9.5).Ifhis the uplift pressure head at a point under the floor, the pressure intensity is ...

section – Fig. 9.10) increases the seepage length, with a corresponding reduction in the exit gradient. It will also provide a s ...

be read off. These are then corrected for the mutual interference of piles, the floor thickness and the slope of the floor, if a ...

100 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 10 20 30 40 50 60 70 80 90 10 20 30 40 50 Values of  (%)D Values of  (%)C Shee ...

effect of the pile depth Dis required to be found, bthe total length of the floor, and b 1 the distance between the two mutual ...