Fish community structure of the middle course of the Bečva River
Czech Journal of Animal Science, 2004 Fish communities of the Bečva River were studied in summer and autumn 2000 and 2001. Electric fishing gear (Honda EX 1000, DC 230 V, 0.75-0.9 kW) was used for sampling. Four sampling sites (Grymov 19.6 r. km, Rybáře 35.8 r. km, Hustopeče 50.7 and Choryně
J. I Namin, P. Spurný
doaj +1 more source
Laboratory studies into hydraulic coefficient in curved planform labyrinth weir and piano key weir
Građevinar, 2019 In this paper, the discharge coefficient of piano key weirs is compared with that of curved planform labyrinth weirs. Results show that the discharge coefficient of piano key weirs is by 17.1% higher compared to that of curved planform labyrinth weirs ...
Behzad Zeraat +4 more
doaj +1 more source
Experimental and numerical study of flow over a triangular broad crested (crump or hump) weir with variable ramp slopes under different head ratios [PDF]
هیدرولیکTo determine the free surface flow characteristics over a triangular broad crested (crump or hump) weir with different with different upstream and downstream slopes, a series of experiments were conducted in hydraulics laboratory using a 5 m long flume ...
فرشته السادات موسوی پور
doaj +1 more source
Characteristics of Flow over Rectangular Labyrinth Weirs with Round Corners
Hydrology, 2021 The hydraulic performance of round-cornered rectangular labyrinth weirs with varying weir heights and effective lengths has not been explored in the existing literature to the authors’ knowledge.
Omed S. Q. Yousif +4 more
doaj +1 more source
Numerical Investigating of Flow and Discharge Coefficient Over the Duckbill and Oblique Weirs [PDF]
پژوهشهای زیرساختهای عمرانی, 2019 For a given channel width, duckbill and oblique weirs have longer effective length, and this could be effective on their dis-charge coefficients and efficiency. In this study, we tried to examine the role of some of the hydraulic and geometric parameters
Somayeh Emami, Javad Parsa
doaj +1 more source
Ecological Solutions and Evidence, 2020 1. Around the globe, instream infrastructures such as dams, weirs, and culverts associated with roads are wide‐spread and continue to be constructed. There is limited documentation of smaller infrastructure because of mixed regulation and laws related to
Stephanie R. Januchowski‐Hartley +6 more
doaj +1 more source
مجله آب و خاک, 2016 Introduction: The compound sharp-crested weirs are composed from several notches and those are designedin different shapes. One of the hydraulic advantagesof compound weirs is that atlowflow rate, the bottomnotchacts assimpleweir andwith the creation of ...
S.N. Mousavi +3 more
doaj +1 more source
Experimental and numerical analysis of flow hydraulics in triangular and rectangular piano key weirs
Water Science, 2020 Piano key weir is a new type of spillways designed to improve the discharge capacity of dams. Generally, increasing the upstream hydraulic load in piano key weirs results in reduced discharge capacity of the weir.
Rezvan Ghanbari, Mohammad Heidarnejad
doaj +1 more source
The Effect of Height and First Roughness Distance on Energy Dissipation in Piano Key Weirs [PDF]
علوم و مهندسی آبیاری, 2019 Along with the numerous developments and facilities for constructing large dams, there is a need for developing design and construction methods for systems that can correctly discharge the floods.
Mahboobeh Qanavati +2 more
doaj +1 more source
DISCUSSION. FIXED AND MOVABLE WEIRS; MOVABLE DAMS IN INDIAN WEIRS. [PDF]
Minutes of the Proceedings of the Institution of Civil Engineers, 1880 n ...
Harcourt, L. F. V. +14 more
openaire +1 more source