TY - JOUR T1 - Influence of Inclined Bed Channel on Characteristic of Flow for Step Broad–Crested Weirs AU - Suleıman, Saleh Jaafer AU - Ismael, Adnan AU - Ahmed, Abdulnaser AU - Al Zubaıdy, Sulaiman Jasim PY - 2018 DA - August JF - The Eurasia Proceedings of Science Technology Engineering and Mathematics JO - EPSTEM PB - ISRES Publishing WT - DergiPark SN - 2602-3199 SP - 118 EP - 127 IS - 2 LA - en AB - Influence of inclined bed channel oncharacteristic of flow for step broad–crested weirs was investigatedexperimentally. Discharge coefficient,water surface profile and Froude number were calculated experimentally.The results showed that water surfaceprofiles were smooth and continues having a descending trend from the point ofmeasurement taking the shape of the weir with a steep drop near the downstreamface of the weir. Increasing effective head to crest height ratio (He/Y)and channel bed slope (So), increased the coefficient of discharge(CD) up to 5%. Also it was found. that for small values of (Fr2),the weir performance tends to the ideal .and with increase (Fr2),the discharge coefficient (CD) decrease for all weir models, becausethe discharge and the velocity heads increases. Empirical equation wasdeveloped on the basis of obtained results. KW - Inclined bed channel KW - Step broad–crested weirs KW - Discharge coefficient CR - Gogus , M. , Defne , Z. and Ozkandemir,V.,(2006). Broad-Crested Weirs with Rectangular Compound Cross Sections. Journal of Irrigation and Drainage Engineering, Vol.132, No.3, June, PP.272-280. Sarker, M .A. and Rhodes, D. G.,( 2004). Calculation of Free-Surface Profile over a Rectangular Broad-Crested Weir. Flow Measurement and Instrumentation,Vol.15, Issue 4, August, PP.215-219. Gonzalez, C.A. and Chanson, H.,( 2007). Experimental Measurement of Velocity and Pressure Distribution on a Large Broad-Crested Weir. Flow Measurement and Instrumentation,Vol.18,Issue 3-4,June-August,PP.107-113. Noori, B. M. and Juma ,I .A.,( 2009). Performance Improvement of Broad Crested Weirs. Journal of Al-Rafidain Eng. / Mosul University, vol.17,no.2,pp.95-107. Al-Talib, A. N. J. (2007). Laboratory Study of Flow Energy Dissipation Using Stepped Weirs M. Sc . Thesis. Engineering College, University of Mosul. Iraq. Hussein H. , Juma I. and Shareef S. (2009). Flow Characteristics and Energy Dissipation Over Single Stepped Broad – Crested Weirs . Journal Al- Rafidain Engineering, College of Engineering University of Mosul. Iraq. Bos, M. G.; Replogle, J. A. and Clemmens , A. J. (1984). Flow Measuring Flumes for Open Channel Systems. John Wiley and Sons, Inc., New York, N.Y. . Boiten , W.,( 2002). Flow Measurement Structures. Flow Measurement and Instrumentation, Vol.13, Issues 5-6, December, PP. 203-207 . Hussein, H.H., Juma, I.A.K., Shareef, S.J.S. (2011). Improving the hydraulic performance of single step broad-crested weirs, Journal of Al-Rafidain Engineering, Mosul University, 7 (1), 1-12. UR - https://dergipark.org.tr/en/pub/epstem/issue//455074 L1 - https://dergipark.org.tr/en/download/article-file/526658 ER -