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The Influence of Roughness on the Discharge Coefficient of a Broad-Crested Weir

Journal Details
License
Format
Journal
First Published
28 Mar 2009
Publication timeframe
4 times per year
Languages
English

The use of environmentally-friendly materials in hydraulic engineering (e.g. the stone lining of weirs at levees) calls for the more accurate estimation of the discharge coefficient for broad-crested weirs with a rough crest surface. However, in the available literature sources the discharge coefficient of broad-crested weirs is usually expressed for a smooth crest. The authors of this paper have summarized the theoretical knowledge related to the effect of weir crest surface roughness on the discharge coefficient. The method of determination of the head-discharge relation for broad-crested weirs with a rough crest surface is proposed based on known discharge coefficient values for smooth surfaces and on the roughness parameters of the weir. For selected scenarios the theoretical results were compared with experimental research carried out at the Laboratory of Water Management Research, Faculty of Civil Engineering (FCE), Brno University of Technology (BUT).

Keywords

AL-KHATIB I. A., 2001: Relationship in Flow Measurement Structures of Symmetrical Rectangular Compound Cross Sections. J. Islamic University of Gaza, Vol. 9, no. 2, p. 11-39.Search in Google Scholar

BOS M. G., 1989: Discharge Measurement Structures, International Institute for Land Reclamation and Improvement/ILRI, Wageningen, The Netherlands.Search in Google Scholar

BUKREEV V. I., DEGTYAREV V. V., 2008: Discharge and Energy-Loss Coefficients In Flow Through a Breach in a Trapezoidal Dam. J. Applied Mechanics and Technical Physics, Vol. 49, No. 1, pp. 53-57.Search in Google Scholar

CLEMMENS A. J., WAHL T. L., BOS M. G., REPLOGLE J. A., 2001: Water Measurement with Flumes and Weirs. International Institute for Land Reclamation and Improvement/ILRI, Wageningen, the Netherlands.Search in Google Scholar

ČSN ISO 3846 (25 9332), 1994: Liquid flow measurement in open channels by weirs and flumes. Rectangular broad-crested weirs.Search in Google Scholar

ČSN ISO 3847 (25 9333), 1997: Measurement of liquid flow in open channels by weirs and flumes. End-depth method for estimation of flow in rectangular channels with a free over-fall.Search in Google Scholar

ČSN ISO 4362 (25 9335), 1995: Measurement of liquid flow in open channels. Trapezoidal profile weirs.Search in Google Scholar

ČSN ISO 4374 (25 9337), 1997: Liquid flow measurement in open channels. Round-nose horizontal broad-crested weirs.Search in Google Scholar

ČSN ISO 8333 (25 9339), 1997: Measurement of liquid flow in open channels by weirs and flumes - V-shaped broad-crested weirs.Search in Google Scholar

EL-ALFY K. S., 2005: Effect of Vertical Curvature of Flow at Weir Crest. Ninth International Water Technology Conference, IWTC9, Sharm El-Sheikh, Egypt, pp 249-262.Search in Google Scholar

FRITZ H. M., HAGER W. H., 1998: Hydraulics of Embankment Weirs. J. Hydraul. Engng., September, Vol. 124, No. 9, pp. 963-971.Search in Google Scholar

GARCÍA M. H., 2008. Sedimentation Engineering. Processes, Measurements, Modeling, and Practice. ASCE Manuals and Reports on Engineering Practice No. 110, ASCE 2008. ISBN 13: 978-0-7844-0814-8.Search in Google Scholar

GÖGÜŞ M., DEFNE Z., ÖZKANDEMIR V., 2006: Broad-Crested Weirs with Rectangular Compound Cross Sections. J. Irrig. Drain. Engng., ASCE, Vol. 132, No. 3, May/June, pp. 272-280.Search in Google Scholar

GONZALEZ C. A., CHANSON H., 2007: Experimental Measurements of Velocity and Pressure Distributions on a Large Broad-Crested Weir, Flow Measurement and Instrumentation, Vol. 18, Issues 3-4, June-August 2007, pp. 107-113.Search in Google Scholar

HAGER W. H., 1993: Breitkroniger Überfall. Wasser, Energie, Luft.Search in Google Scholar

HAGER W. H., SHWALT M., 1994: Broad-crested Weir. J. Irrig. Drain. Engng., Vol. 120, No. 1, pp. 13-26.Search in Google Scholar

HALL G. W., 1962: Analytical Determination of the Discharge Characteristics of Broadcrested Weirs Using Boundary Layer Theory. Proc.-Inst. Civ. Eng., Vol. 22, Issue 2, pp. 172-190.Search in Google Scholar

HULSING H., 1968: Measurement of Peak Discharge at Dams by Indirect Method. Application of Hydraulics, Book 3, Chapter A5. USGS, United States Government Printing Office, Washington.Search in Google Scholar

KHOSROJERDI A., KAVIANPOUR M. R., 2002: Hydraulic Behavior of Straight and Curved Broad Crested Weirs, Proc., 5th Int. Conf. on Hydroscience Engineering, IAHR, Warsaw, Poland.Search in Google Scholar

KISELEV P. G., 1972: Handbook on hydraulic calculations. (In Russian.) Energija, Moscow, 312 p.Search in Google Scholar

KOLÁŘ V., PATOČKA C., BÉM J., 1983: Hydraulics. SNTL, Prague 1983.Search in Google Scholar

MOSS W. D., 1972: Flow separation at the upstream edge of a square-edged broad-crested weir. J. Fluid Mech., 52, 2, p. 307-320.Search in Google Scholar

MUNSON B. R., YOUNG D. F., OKIISHI T. H., 1994: Fundamentals of Fluid Mechanics. 2nd edition, John Wiley, New York, 893 p.Search in Google Scholar

PAŘÍLKOVÁ J., PÁNA P., ŘÍHA J., ZACHOVAL Z., 2009: The findings from experimental research into dike spillways. Xii. International Scientific Conference, FCE, BUT, Czech Republic, ISBN 978-80-7204-629-4.Search in Google Scholar

PICEK T., HAVLÍK A., 2008: Calculation of discharge above entirely submerged bridge deck - application of weir equation. J. Hydrol. Hydromech., 56, 2008, 2, 82-87.Search in Google Scholar

SARKER M. A., RHODES D. G., 2004: Calculation of Free-Surface Profile over a Rectangular Broad-Crested Weir, Flow Measurement and Instrumentation, Vol. 15, pp. 215-219.Search in Google Scholar

SCHLICHTING H., 1979: Boundary-Layer Theory. McGraw-Hill, Inc. 817 p. ISBN 0-07-055334-3.Search in Google Scholar

USACE, 1992: Hydraulic Design of Spillways - engineer manual. Department of the Army, U. S. Army Corps of Engineers, 170 p.Search in Google Scholar

USBR, 2001: Water Measurement Manual. A Water Resources Technical Publication. U. S. Department of the Interior Bureau of Reclamation. 3rd edition, Revised reprint. 485 p. ISBN: 0-16-061763-4Search in Google Scholar

VILLEMONTE J. R., 1947: Submerged weir discharge studies, Engineering news record, Vol. 139, pp. 54-57.Search in Google Scholar

WOLS B., UIJTTEWAAL W., LABEUR R. J., STELLING G., 2006: Rapidly Varying Flow Over Oblique Weirs, the 7th Int. Conf. on Hydroscience and Engineering (ICHE-2006), Sep 10-Sep 13, Philadelphia, USA.Search in Google Scholar

YEN B. C., 2002: Open channel flow resistance. J. Hydraul. Engng., ASCE, 128, 20-39.Search in Google Scholar

ZACHOVAL Z., VESELÝ J., PAŘÍLKOVÁ J., 2009: Determination of the discharge coefficient of a trapezoidal broad-crested weir with a rough surface. Symposium of hydro technicians 2009, Brno, Czech Republic. pp. 88-94. ISBN 978-80-214-3883-5.Search in Google Scholar

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