Results 1 to 10 of about 1,708 (167)

Developing Formulae for combined weir and orifice (case study: EL-Fayoum weirs)

open access: yesAEJ - Alexandria Engineering Journal, 2013
In this study, Formulae were developed for rehabilitated weirs (i.e., combined weirs and orifices, weirs with 1 or 2 pipes in their bodies). Several sites of the existing rehabilitated weirs in El-Fayoum were visited. During the visits, measurements were
Ahmed M. El-Belasy
exaly   +3 more sources

A Note on the Discharge over Full-width Rectangular Sharp-‎crested Weirs and Weirs of Finite Crest Length‎ [PDF]

open access: yesJournal of Applied and Computational Mechanics, 2023
The head-discharge relationship for sharp-crested weirs is developed based on the energy consideration upstream and at the crest of the weir. The discharge for weirs of finite crest length is estimated by correlating the critical depth and total energy ...
Amir H. Azimi, Nallamuthu Rajaratnam
doaj   +1 more source

Erosion and accumulation flood landforms in Sázava River in spring 2006

open access: yesActa Universitatis Carolinae Geographica, 2021
This article deals with channel bars, flood accumulations of floodplain and bank scours as the most important geomorphologic effects of the spring flood in Sazava River in 2006.
Marek Křížek
doaj   +1 more source

Stream Barrier Removal: Are New Approaches Possible in Small Rivers? The Case of the Selho River (Northwestern Portugal)

open access: yesHydrology, 2023
The identification and characterization of barriers to river continuity are essential for the preparation of an inventory of hydraulic infrastructure. To this end, it is necessary to define the main identifying and characterizing elements of hydraulic ...
Francisco Costa, António Vieira
doaj   +1 more source

Refocusing Sustainability Education: Using Students’ Reflections on Their Carbon Footprint to Reinforce the Importance of Considering CO2 Production in the Construction Industry

open access: yesFrontiers in Built Environment, 2020
The construction industry is the most significant contributor to the UK’s CO2 emissions. Its activities are responsible for an annual output of approximately 45% of the total.
John Weirs, Allan Osborne
doaj   +1 more source

Risks to Fish Populations in Dryland Rivers From the Combined Threats of Drought and Instream Barriers

open access: yesFrontiers in Environmental Science, 2021
In dryland rivers, flow intermittency means fish populations are often subjected to drought disturbance. The viability of these fish populations depends on the availability of waterhole refuges for individuals to survive drought (resistance) and the ...
Jonathan C. Marshall   +3 more
doaj   +1 more source

Effect of the hydraulic conditions and structure geometry on mathematical modelling of discharge coefficient for duckbill and oblique weirs [PDF]

open access: yesعلوم و مهندسی آبیاری, 2016
Weirs are one the most important hydraulic structures for flow control, water measurement and regulating of upstream water elevation in canals, irrigation networks and rivers. For a given of channel width, duckbill and oblique weirs have longer effective
Pardis Nikpiek   +1 more
doaj   +1 more source

Simulation of the Hydraulic Performance of Parallel Pivot Weirs with Different Angles [PDF]

open access: yesJournal of Applied Fluid Mechanics, 2023
Pivot weirs are one of the most important structures for regulating the water level in rivers and canals. These weirs are constructed with one or more gates in a row in the waterways.
B. Khatamipour   +3 more
doaj   +1 more source

Approximation of aeration efficiency at sharp-crested weirs using metaheuristic regression approaches

open access: yesJournal of Hydroinformatics, 2023
This paper explores the ability of multivariate adaptive regression splines, decision trees, Gaussian processes, and multiple non-linear regression equation approaches to predict the aeration efficiency at various weirs and discusses their results.
Akash Jaiswal, Arun Goel, Parveen Sihag
doaj   +1 more source

Hydraulic Structures as a Key Component of Sustainable Water Management at the Catchment Scale—Case Study of the Rgilewka River (Central Poland)

open access: yesBuildings, 2022
Poland is among the European countries with the lowest water resources. The central part of Poland features the least water resources in the country.
Bogumił Nowak   +3 more
doaj   +1 more source

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