Open Channel Flow Articles | Environmental XPRT

Open Channel Flow - The use of Level sensors for open channel flow measurement

Open Channel Flow - The use of Level sensors for open channel flow measurement Level sensors from SolidAT are implemented in Open Channel Flow applications. In these types of applications, the level sensor is installed above a special water flow structure and accurately measures level of flowing water or wastewater. The sensor then calculates flow through the structure ...

Jun. 28, 2012

By Solid Applied Technologies Ltd. (SolidAT)

Analyzing the turbulent flow on steep open channels

In channels with steep slopes, the flow is supercritical and the formation of roll waves is expected. In order to evaluate the flow behaviors in steep open channels, the Azad dam spillway is simulated numerically and its flow characteristics are compared with the physical model tests. In this study, the hydraulic variables including hydraulic depth and water surface profile are studied along ...

Mar. 22, 2016

By IWA Publishing

Longitudinal dispersion in open channel flow with suspended canopies

Suspended canopies can cause flow disturbances such as reducing velocities within the canopy, and increasing flow beneath the canopy. Flow modifications by canopies dramatically affect the fate and transport of sediment, nutrients, contaminants, dissolved oxygen, and fauna in aquatic systems. A three-zone model is presented here to predict the longitudinal dispersion coefficient by simplifying ...

Jun. 6, 2016

By IWA Publishing

Prediction of flow resistance in a compound open channel

Flooding in a river is a complex phenomenon which affects the livelihood and economic condition of the region. During flooding flow overtops the river course and spreads around the flood plain resulting in a two-course compound channel. It has been observed that the flow velocity in the flood plain is slower than that in the actual river course. This can produce a large shear layer between ...

Jan. 21, 2014

By IWA Publishing

GP approach for critical submergence of intakes in open channel flows

This technical paper presents the genetic programming (GP) approach to predict the critical submergence for horizontal intakes in open channel flow for different bottom clearances. Laboratory data from the literature for the critical submergence for a wide range of flow conditions were used for the development and testing of the proposed method. Froude number, Reynolds number, Weber number and ...

Sep. 25, 2012

By IWA Publishing

Closed vessel or open channel UV disinfection systems

Ultra violet disinfection is now a standard feature in most waste water disinfection systems. UV has also been adopted by the drinking water community, as a barrier against the chlorine tolerant species such as Cryptosporidium and Giardia. The technology is widely favored due to its non- chemical nature, the fact that no subsequent de-chlorination process is required, and its ability to be ...

Jan. 1, 2011

By atg UV Technology

Improved Open Channel Flow Measurement & Control Using Pulsed Hybrid Flat Bed Magmeters

ABSTRACT This paper introduces Pulsed Hybrid flat bad magnetic flowmeter techniques and how they improve the quality of flow measurement and control over existing art, normally with significant cost savings in operation and installation. The flat bed magmeters have been extensively tested in the laboratory and on-site, with details given for a particular site case. Such tests gave ...

Oct. 13, 2007

By Water Environment Federation (WEF)

Effect of bed roughness on 1-D entropy velocity distribution in open channel flow

A theoretic-analytical formulation, based on entropy velocity profile law and classical relationships for uniform flow and friction factor, is proposed enlightening the general logarithmic relationship existing between the parameter Φ(M), defined as mean cross section velocity over maximum velocity, and the ratio water depth/bed roughness ...

Jan. 29, 2015

By IWA Publishing

Open Channel Flow Monitors retired after 16 years continuous service - Case Study

Long Sault WWTP Influent Flow Monitors Greyline Open Channel Flow Monitors were installed at the Wastewater Treatment Plant in Long Sault, Ontario when the SBR plant was originally commissioned in 1995. But after 16 years of continuous service, components for the old models became obsolete. Plant operators Caneau Water and Sewage Inc. decided to replace the instruments and new Greyline OCF ...

Aug. 11, 2017

By Greyline Instruments Inc.

Efficient investigation on fully developed flow in a mildly curved 180° open-channel

Turbulent flow in meandering open channels is one of the most complicated and unpredictable turbulent flows as the interaction of various forces, such as pressure gradient, centrifugal force, and wall shear stresses severely affect the flow pattern. In order to improve significance in engineering application, understanding the overall flow characteristic is the focus. This paper presents the ...

Nov. 10, 2014

By IWA Publishing

OCF 5.0 open channel flow monitors - monitor infulent at Long Sault WWTP plant - Case Study

Greyline Open Channel Flow Monitors were installed at the Wastewater Treatment Plant in Long Sault, Ontario when the SBR plant was originally commissioned in 1995. But after 16 years of continuous service, components for the old models became obsolete. Plant operators Caneau Water and Sewage Inc. decided to replace the instruments and new Greyline OCF 5.0 Open Channel Flow Monitors were installed ...

Sep. 9, 2011

By Greyline Instruments Inc.

French WWTP installs LIT open channel UV-system

Recently O.E.I. France, distributor of LIT for the French market, installed a LIT open channel UV system in the South of France close to the Mediterranean Sea. The system is placed in the municipal Waste Water Treatment Plant (WWTP) of the village of Canet-en-Roussillon with 10.182 inhabitants. The capacity of the WWTP however is based on the summer season population of 66.000 inhabitants. The ...

Jul. 7, 2009

By LIT UV EUROPE / LIT Technology

Prediction of end-depth ratio in open channels using genetic programming

In this paper, genetic programming (GP) is used as an effective model induction tool to solve a classic problem in open channel flow: the free overfall. By applying GP to experimental data of circular channels with a flat bed and employing a model selection procedure, a reliable expression in the form of hc = AheeBvs0 is found for calculating the critical depth (hc) and end-depth ratio (EDR). ...

Jan. 1, 2011

By IWA Publishing

Improving flow distribution in influent channels using computational fluid dynamics

Although the flow distribution in an influent channel where the inflow is split into each treatment process in a wastewater treatment plant greatly affects the efficiency of the process, and a weir is the typical structure for the flow distribution, to the authors' knowledge, there is a paucity of research on the flow distribution in an open channel with a weir. In this study, the influent ...

Aug. 4, 2016

By IWA Publishing

SCS - Spiral Channel Screen

Here we grow again! More new products from Arlat Arlat releases it’s ‘SCS’ Spiral Channel Screen, for use in small channels and Septage Receiving stations. Ready for release this year, Arlat is adding another screen design to their product line up. The SCS is designed for channels that are 2’ (24”) in width or smaller. Arlat has received numerous call from sales representatives and ...

Aug. 26, 2009

By Arlat Technology Inc. - a division of Price-Schonstrom

Predicting apparent shear stress in prismatic compound open channels using artificial neural networks

The apparent shear stress acting on the vertical interface between main channel and floodplain (with and without vegetation) in prismatic compound open channels was studied using artificial neural networks (ANNs). Apparent shear stress is commonly used to quantify the transverse momentum exchange between sub-areas of the cross section, and its influencing factors include channel geometry, ...

Nov. 27, 2012

By IWA Publishing

Open MI: linking models

Traditionally sewers and rivers have been modelled separately using different software applications, with outputs from one model being fed into the other. However this does not fully represent the continuous interaction between the two modeled elements. Assessing the impact of sewerage discharges and overland flows from urban areas to watercourses and the subsequent effects of watercourse levels ...

Aug. 9, 2007

By Innovyze

What is Cross Flow Velocity?

Q: What is Cross Flow Velocity? A: Cross flow velocity (CFV) is the linear velocity of the flow tangential to the membrane surface and is reported in [m/sec] or [ft/sec]. CFV affects fouling rate and formation of concentration polarization at membrane surface and is calculated by dividing the volumetric flow rate [lpm or ...

May 26, 2017

By Sterlitech Corporation

Ayalon concrete channel, Tel-Aviv, Israel - Case Study

In Israel, the long, dry summer is followed by a short rainy winter season causing high-flow, high-velocity streams and flooding often occurs. Serving as the divider for the north and south lanes of the Tel-Aviv Freeway, the Ayalon channel was designed to handle the surging waters of the Ayalon River during Tel-Aviv’s winter rainy season. Since the channel's original design, the city has ...

Jun. 10, 2009

By Presto Geosystems

Accurate management of waste water flow case study

SmartScan 50O provides an accurate ultrasonic solution for flow measurement of waste water in a nation-wide advanced treatment plant. This wastewater treatment plant is located just outside a pop. 1 Million City. The plant provides wastewater treatment services for the municipality since 1999. The plant utilizes the latest technology of wastewater treatment that enables purification of ...

Jan. 12, 2012

By Solid Applied Technologies Ltd. (SolidAT)

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