Minimizing the hydraulic side effects of weirs construction by using labyrinth weirs

Saleh, Osama K.; Elnikhely, E.A.; Fathy, Ismail

doi:10.1016/j.flowmeasinst.2019.01.016

Cited by 10 publications

(4 citation statements)

References 7 publications

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“…Also, Monjezi et al [6] studied the discharge coefficient of straight and arced weirs in linear and triangular labyrinth forms experimentally. Moreover, Saleh et al [7] investigated the hydraulic behavior of labyrinth weirs experimentally and numerically. It was shown that labyrinth weirs had longer crest length and lower operating heads compared to ordinary weirs.…”

Section: Introductionmentioning

confidence: 99%

A novel approach using CFD and neuro-fuzzy-firefly algorithm in predicting labyrinth weir discharge coefficient

Shafiei

Najarchi

Shabanlou

2019

J Braz. Soc. Mech. Sci. Eng.

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In this paper, for the first time, to model the discharge coefficient of labyrinth weirs, the evolutionary firefly algorithm (FFA) is used for optimizing the membership functions of the adaptive neuro-fuzzy inference system (ANFIS). Also, to enhance the performance of the ANFIS and ANFIS-FFA models, the Monte Carlo simulations (MCs) are employed. Additionally, the k-fold cross-validation is utilized for training and testing the methods. Next, some input dimensionless parameters including the Froude number (Fr), the ratio of the head above the weir to the weir height (H T /P), cycle sidewall angle (α), the ratio of length of the weir crest to the channel width (L c /W), the ratio of length of apex geometry to the width of a single cycle (A/w) and the ratio of the width of a single cycle to the weir height (w/P) are determined. After that, seven different models are developed for ANFIS and ANFIS-FFA. Then, by conducting a sensitivity analysis, the superior models (ANFIS-FFA 5 and ANFIS 5) and the most effective input parameter (Froude number) are identified. Moreover, the error distribution results exhibit that about 70% of the superior model results have errors less than 5%. Subsequently, the discharge coefficient is simulated by means of a computational fluid dynamics (CFD) model. Furthermore, a comparison of the CFD model with the ANFIS and ANFIS-FFA models reveals that the ANFIS-FFA model is significantly more accurate. Also, an uncertainty analysis is performed for the CFD, ANFIS and ANFIS-FFA models. Finally, a very simple code calculating the discharge coefficient of labyrinth wires is presented. This code can be easily employed without any knowledge on ANFIS, FFA and prior information about MATLAB.

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Section: Introductionmentioning

confidence: 99%

A novel approach using CFD and neuro-fuzzy-firefly algorithm in predicting labyrinth weir discharge coefficient

Shafiei

Najarchi

Shabanlou

2019

J Braz. Soc. Mech. Sci. Eng.

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“…However, modern times see the fading of the traditional ecological wisdom worldwide, and the emergent of large-scale, usually single-goal hydraulic complexes after the Industrial Revolution (Echols & Nassar, 2006;Shannon, De Meulder, d'Auria, & Gosseye, 2008). Only until recent decades have people realized the side effects induced by the new strategy for its neglection of related socioeconomic and ecological complexities (Saleh, Elnikhely, & Ismail, 2019), as is evident in cases such as the New York City's great loss in Hurricane Sandy, and most recently Zhengzhou's loss of lives in an extreme rainfall event on July 17, 2021. As a remedy in some sense, the concept of sustainable water system management has emerged in recent decades (Fletcher et al, 2015;Lloyd, Wong, & Chesterfield, 2002;US EPA, 2000), and people are now advocating for the "building with nature" concept in hydraulic engineering (de Vriend, van Koningsveld, Aarninkhof, de Vries, & Baptist, 2015;van Staveren & van Tatenhove, 2016), and "design with nature" in socio-ecological system planning in general (McHarg, 1969).…”

Section: Discussionmentioning

confidence: 99%

Distributive hydraulic engineering, cross‐scale landscape planning, and climate change resilience: On the water‐adaptive strategy in the Huai'an–Yangzhou Section of China's Grand Canal

Xiao

Jiang

et al. 2022

River Research & Apps

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Water system plays a key role in the coupled human‐nature system, and ancient people's experiences to build a water‐adaptative way of life still shed light on human's pursuit for climate resilience today with their innate traditional ecological wisdom. In this paper, taking the Huai'an‐Yangzhou Section of China's Grand Canal, and particularly its hydraulic engineering system as an example, we show the system's success in addressing the multi‐dimensional challenges in a historical geographical context, as well as its landscape‐shaping power across the entire lower Yellow‐Huai River Basin up until today. Therefore, we argue that the system is not merely a hydraulic engineering project, but a cross‐scale adaptive strategy that has deeply impacted generations of people's way of livelihood with its intrinsic resilient nature. We attribute the success to the advantages brought about by the “distributive hydraulic engineering” approach, which is reflected in the ancient Grand Canal‐management, over the “master‐structure dependent” approach which appears to be the common practice in modern hydraulic engineering. For testing the hypothesis, we build complex system models representing the two approaches with the Qingkou Hydraulic Nexus as an example, and by running long‐term simulation, we evaluate the performance of the two approaches with respect to long‐term resilience. We show from a complex network perspective that the former has significant flexibility advantages, and outperforms the former in multi‐goal fulfillment capacities and long‐term resilience especially under a low‐tech, tight resource constraints condition. We conclude the paper with discussions on the implications of the findings, and argue that though with limitations, the traditional ecological wisdom as reflected in the Grand Canal case, with its holistic approach and flexibility design, still sheds lights on today's large‐scale hydraulic engineering projects that pursue a resilient solution for long‐term adaptive survival for the mankind.

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“…Generally, the river water level is located below the cultivated land elevation. Hence, weir is widely used to elevate river water level as irrigation system requirements (Saleh et al, 2019). There are two type of weir, fixed and movable weir.…”

Section: Weirmentioning

confidence: 99%

Preliminary Recognition of River Infrastructure

Maulana

Suprayitno

Soemitro

2019

Journal of Infrastructure &Amp; Facility Asset Management

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River infrastructures can be defined as facilities and structures that support all activities related to river. Many infrastructures that exist along river stream but few of them are listed and recognized as an important part in the river system. The condition of assets that support the river function should be considered since it determines the sustainability of water supply system for many areas. Starting from upstream, there were dam and reservoir that constructed to reserve the water. Moreover, the water can be distributed to the downstream area for many requirements, such as irrigation system, hydro power, industrial process, etc. In the other hand, dam and reservoir also functioned as flood control that protect the downstream area from flood and inundation. In alluvial river, there were erosions that occurs as river flow velocity could transported soft soil numerously. Hence, the river bank protections were built in order to protect the nearby river infrastructures. Therefore, the infrastructures recognition as preliminary assessment to the river asset management need to be done in order to maintain the river system.

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Minimizing the hydraulic side effects of weirs construction by using labyrinth weirs

Cited by 10 publications

References 7 publications

A novel approach using CFD and neuro-fuzzy-firefly algorithm in predicting labyrinth weir discharge coefficient

A novel approach using CFD and neuro-fuzzy-firefly algorithm in predicting labyrinth weir discharge coefficient

Distributive hydraulic engineering, cross‐scale landscape planning, and climate change resilience: On the water‐adaptive strategy in the Huai'an–Yangzhou Section of China's Grand Canal

Preliminary Recognition of River Infrastructure

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