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 years. If this is not accept-
able either the crest height has to be increased or its length decreased.
Both alternatives create undesirable conditions upstream of the structure
(frequent flooding).
References
Abbott, M.B. and Minns, A.W. (1998) Computational Hydraulics, 2nd edn, Alder-
shot, Ashgate.
Ackers, P. (1983) Sediment transport problems in irrigation systems design, in
Developments in Hydraulic Engineering, Vol. 1 (ed. P. Novak), Elsevier
Applied Science, London.
—— (1993) Flow formulae for straight two-stage channels. Journal of Hydraulic
Research, 31 (4): 509–31.
Ackers, P., White, W.R., Perkins, J.A. and Harrison, A.J.M. (1978) Weirs and
Flumes for Flow Measurement, Wiley, New York.
Armanini, A., Righetti, M. and Grisenti, P. (2005) Direct measurement of vegeta-
tion resistance in prototype scale, J. of Hydraulic Research, IAHR 43, No. 5:
481–7.
Blench, T. (1969) Mobile Bed Fluviology, Alberta University Press, Calgary.
Bos, M.G. (ed.) (1976) Discharge Measurement Structures, Report 4, Laboratory of
Hydraulics and Catchment Hydrology, Wageningen.
Bos, M.G. Replogle, J.A. and Clemmens, A.J. (1984) Flow Measuring Flumes for
Open Channel Systems, Wiley, New York.
Brandon, T.W. (ed.) (1987, 1989) River Engineering, Parts I and II, Institute of
Water and Environmental Management, London.
Brierley, S.E. and Novak, P. (1983) The effect of a reservoir on the morphology of
a gravel-bed river with tributaries, in Proceedings of the 20th Congress of
the International Association for Hydraulic Research, Moscow, Vol. VI:
49–57.
BSI (1969a) Measurement of Liquid Flow in Open Channels: Velocity-Area
Methods, BS 3680, Part 3, British Standards Institution, London.
—— (1969b) Measurement of Liquid Flow in Open Channels: Weirs and Flumes,
BS 3680, Part 4, British Standards Institution, London.
—— (1986) Measurement of Liquid Flow in Open Channels: Dilution Methods, BS
3680, Part 2, British Standards Institution, London.
Chadwick, A., Morfett, J. and Borthwick, M. (2004) Hydraulics in Civil and
Environmental Engineering, 4th edn, E & FN Spon, London.
Chow, V.T. (1983) Open Channel Hydraulics, McGraw-Hill, New York.
Cole, J.A. (ed.) (1982) Advances in Hydrometry, Proceedings of the 1st Inter-
national Symposium, Publication 134, International Association of Hydro-
logical Science, Exeter.
Copin, N.J. and Richards, I.G. (1990) Use of Vegetation in Civil Engineering,
CIRIA, Butterworth, London.
360 RIVER ENGINEERING
