Article
Multidisciplinary Sciences
Yusuf Dogan, Nihat Kaya
Summary: Labyrinth side weirs have significant advantages in terms of discharge capacity compared to conventional side weirs. This study experimentally investigated the effect of narrowing the effective crest length of labyrinth side weirs on the discharge capacity and found that decreasing the crest length results in a decrease in discharge capacity.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Mechanical
Erick Mattos-Villarroel, Jorge Flores-Velazquez, Waldo Ojeda-Bustamante, Carlos Diaz-Delgado, Humberto Salinas-Tapia
Summary: Labyrinth type weirs are structures with geometric advantages for increased discharge capacity. Circular apex weirs are more efficient than trapezoidal ones, while half-round and WES crest profiles generally have higher discharge coefficients. Different crest profiles also affect pressure distribution on the weir walls.
FLOW MEASUREMENT AND INSTRUMENTATION
(2021)
Article
Agricultural Engineering
Aylar Samadi, Farzin Salmasi, Hadi Arvanaghi, Maysam Mousaviraad
Summary: The effects of geometrical parameters, including crest height, number of cycles, and plan weir configuration, on labyrinth weirs were experimentally investigated. The study found that taller weirs and more cycles resulted in lower discharge coefficients and flow rates. The reductions in hydraulic performance were most significant for trapezoidal weirs, followed by rectangular and triangular configurations. The modification of geometrical ratios had less significant effects on the flow characteristics.
JOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING
(2022)
Article
Engineering, Mechanical
Mohammad Derakhshanifard, Mohammad Heidarnejad, Alireza Masjedi, Amin Bordbar, Aslan Egdernezhad
Summary: The study investigated the discharge coefficient of trapezoidal and triangular labyrinth weirs and found that labyrinth weirs have higher discharge coefficients than linear weirs. Experimental tests were conducted under different hydraulic head ratios and the results showed that different weir shapes affect the discharge coefficient. Statistical analysis identified TRTPO and TPTRO weirs as having the highest correlation with the discharge coefficient.
FLOW MEASUREMENT AND INSTRUMENTATION
(2023)
Article
Environmental Sciences
Erick Dante Mattos-Villarroel, Waldo Ojeda-Bustamante, Carlos Diaz-Delgado, Humberto Salinas-Tapia, Jorge Flores-Velazquez, Carlos Bautista Capetillo
Summary: A labyrinth weir is an alternative approach to design or rehabilitate spillways with higher discharge capacity, especially at low hydraulic heads, and can be used as a strategy for dam safety problems. A sequential design method for a labyrinth weir is proposed based on optimal geometric parameters and discharge flow analysis using Computational Fluid Dynamics and experimental studies. The results show a higher discharge capacity when H-T/P <= 0.17, and the interference of the nappe is quantified and characterized. Additionally, a spreadsheet and a flowchart are provided to support labyrinth weir design.
Article
Computer Science, Interdisciplinary Applications
Anees Idrees, Riyadh Al-Ameri
Summary: Climate change has resulted in the inefficiency of old weirs, prompting the need to increase the discharge capacity of labyrinth weirs. This study proposes a new approach by modifying the structure of labyrinth weirs. Experimental data were collected using different sidewall angles, and the results showed that specific dimensionless terms can be used to maximize the compound discharge coefficient. Regression empirical equations were generated and it was found that labyrinth weirs with larger sidewall angles were less efficient, with a maximum efficiency increase of 10% compared to conventional labyrinth weirs.
JOURNAL OF HYDROINFORMATICS
(2023)
Article
Engineering, Mechanical
Anees K. Idrees, Riyadh Al-Ameri
Summary: The present study investigates the hydraulic characteristics and energy dissipation of compound labyrinth weirs. The results show that a higher sidewall angle increases the compound coefficient of discharge for compound labyrinth weirs. Additionally, the energy dissipation improvement of compound labyrinth weirs is better than that of linear weirs.
FLOW MEASUREMENT AND INSTRUMENTATION
(2023)
Article
Engineering, Mechanical
Farehe Sadat Arham Namazi, Javad Mozaffari
Summary: This study experimentally investigated the use of labyrinth weirs to reduce flood depth in dams and rivers, with triangular weirs proving to be more efficient than circular weirs. The increase in total water head ratio decreases the discharge coefficient in all models, while increasing the number of cycles in labyrinth weirs reduces their efficiency.
FLOW MEASUREMENT AND INSTRUMENTATION
(2023)
Article
Engineering, Mechanical
Thair J. Alfatlawi, Riyam D. Mohammed Alkafaji
Summary: This research studied the influence of installing an antivortex structure in stepped labyrinth side weirs on discharge capacity. The results showed that installing anti-vortices significantly improved the efficiency of the side weir and reduced secondary flows caused by interaction with the vertical axis. The discharge coefficient improved by 18% after analyzing the best type of antivortex, considering shape and height.
FLOW MEASUREMENT AND INSTRUMENTATION
(2023)
Article
Engineering, Civil
Hossain Zare, Mohammad Vaghefi, Amin Mahmoudi, Abdol Mahdi Behroozi
Summary: This study investigates the hydraulic performance and discharge coefficient of inclined circular labyrinth weirs with different angles of inclination and diameters. The results show that the flow over the weirs transitions from free flow to submerged flow as the flow rate increases, with no air infiltration. The discharge coefficient decreases with an increase in the dimensionless ratio of total hydraulic head to weir height. The inclined weir with a 60-degree angle exhibits the highest discharge coefficient, while the vertical weir has the lowest coefficient. Weir diameter has a minimal effect on the discharge coefficient. Overall, this research contributes to the understanding and optimization of the performance of inclined circular labyrinth weirs in water management systems.
WATER RESOURCES MANAGEMENT
(2023)
Article
Computer Science, Artificial Intelligence
Khabat Khosravi, Mir Jafar Sadegh Safari, Zohreh Sheikh Khozani, Brian Crookston, Ali Golkarian
Summary: This study proposes eight standalone algorithms and hybridizes them using the stacking algorithm to predict the discharge coefficient of sharp-crested labyrinth weirs. The accuracy of the models is evaluated using different criteria, and the results show that all algorithms perform accurately, with ST-Kstar having the highest prediction power.
Article
Engineering, Mechanical
Jamal Feili, Mohammad Heidarnejad, Alireza Masjedi, Mehdi AsadiLour
Summary: This study focused on trapezoidal arced labyrinth weirs (TALW) of widened middle cycle, and results showed that with a decrease in specific geometric parameter ratios, the discharge coefficient of these weirs would increase significantly.
FLOW MEASUREMENT AND INSTRUMENTATION
(2021)
Article
Agricultural Engineering
Farzin Salmasi, Nastaran Sabahi, John Abraham
Summary: Weirs are classified into different types, with the study focusing on the discharge coefficients of rectangular broad-crested gabion weirs. The Cd of gabion weirs is 10.5% higher than that of solid weirs, and 17.2% higher for free flow conditions compared to submerged flow conditions. Weirs with lower porosities have higher submergence ratios at specific H/L values.
JOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING
(2021)
Article
Engineering, Multidisciplinary
Amr A. Bekheet, Nahla M. AboulAtta, Neveen Y. Saad, Doaa A. El -Molla, Flume Width
Summary: This study evaluates the effect of the piano key weir's shape and type on flow efficiency, finding that the trapezoidal shape has the highest efficiency while the triangular shape has the lowest. The ratio Wi/Wo is the most important parameter influencing PKW flow efficiency.
AIN SHAMS ENGINEERING JOURNAL
(2022)
Article
Mechanics
Shang-tuo Qian, Yan Zhang, Hui Xu, Xiao-sheng Wang, Jian-gang Feng, Zhi-xiang Li
Summary: A numerical study was conducted on embankment weir overflow to examine the effects of weir roughness under free and submerged conditions. The roughness factor varies with roughness height and tailwater depth, with different relationships in different flow regimes. The findings suggest significant effects of weir roughness on overflow discharge under certain conditions.
JOURNAL OF HYDRODYNAMICS
(2021)
Editorial Material
Agricultural Engineering
M. R. Dabling, B. P. Tullis, B. M. Crookston
JOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING
(2015)
Editorial Material
Agricultural Engineering
M. R. Dabling, B. P. Tullis, B. M. Crookston
JOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING
(2015)
Article
Engineering, Civil
Bruce M. Savage, Brian M. Crookston, Greg S. Paxson
JOURNAL OF HYDRAULIC ENGINEERING
(2016)
Article
Engineering, Civil
Bruce M. Savage, Brian M. Crookston, Greg S. Paxson
JOURNAL OF HYDRAULIC ENGINEERING
(2016)
Editorial Material
Engineering, Civil
Brian M. Crookston, Greg S. Paxson, Bruce M. Savage
JOURNAL OF HYDRAULIC ENGINEERING
(2017)
Editorial Material
Engineering, Civil
S. L. Hunt, K. C. Kadavy, B. M. Crookston
JOURNAL OF HYDRAULIC ENGINEERING
(2017)
Editorial Material
Engineering, Civil
Brian M. Crookston, Greg S. Paxson, Bruce M. Savage
JOURNAL OF HYDRAULIC ENGINEERING
(2017)
Editorial Material
Engineering, Civil
S. L. Hunt, K. C. Kadavy, B. M. Crookston
JOURNAL OF HYDRAULIC ENGINEERING
(2017)
Article
Engineering, Civil
D. Valero, D. B. Bung, B. M. Crookston
JOURNAL OF HYDRAULIC ENGINEERING
(2018)
Article
Engineering, Civil
B. M. Crookston, R. M. Anderson, B. P. Tullis
JOURNAL OF HYDRO-ENVIRONMENT RESEARCH
(2018)
Article
Engineering, Civil
D. Valero, D. B. Bung, B. M. Crookston
JOURNAL OF HYDRAULIC ENGINEERING
(2018)
Article
Agricultural Engineering
M. R. Dabling, B. P. Tullis, B. M. Crookston
JOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING
(2013)
Editorial Material
Agricultural Engineering
B. P. Tullis, B. M. Crookston
JOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING
(2014)
Proceedings Paper
Engineering, Civil
B. M. Crookston, G. S. Paxson, D. B. Campbell
LABYRINTH AND PIANO KEY WEIRS II - PKW 2013
(2014)
