water flow rating curve Articles

  • Horsepower on the pump curve

    Now that the head capacity relationship along the X and Y axes of the pump curve has been established in Part 1 of this series, the pump curve can be used to determine the amount of horsepower required to meet the head and capacity requirements for the job. Horsepower is a unit of power equal to 550 foot pounds per second or 746 watts. Water horsepower is the minimum power ...

  • Linking the management of urban watersheds with the impacts on the receiving water bodies: the use of flow duration curves

    There is growing evidence that changes in the current hydrological behaviour of urbanising catchments are a major source of impacts on the downstream water bodies. However, current flow-rates are rarely considered in studies on urban stormwater management, usually focused on extreme flow-rates. We argue that taking into account receiving water bodies is possible with relatively small ...


    By IWA Publishing

  • Breakthrough curves of oil adsorption on novel amorphous carbon thin film

    A novel amorphous carbon thin film (ACTF) was prepared by hydrolyzing wood sawdust and delignificating the residue to obtain cellulose mass that was subjected to react with cobalt silicate nanoparticle as a catalyst under the influence of sudden concentrated sulfuric acid addition at 23 °C. The novel ACTF was obtained in the form of thin films like graphene sheets having winding surface. The ...


    By IWA Publishing

  • Higher filtration rates mean better results for Filtronics customers

    Filtronics has been ahead of the curve in terms of providing create, effective and cost efficient water treatmentsystems for city water ...


    By Filtronics, Inc.

  • Modeling overland flows in InfoWorks CS

    A new tool within InfoWorks CS v7.5 enables the presentation of flood depths within the bounds of a polygon, otherwise known as a flood compartment. The flood level can be extended throughout the boundaries of the compartment, allowing it to be matched against a ground model to calculate flood depth. The new tool does not alter the way in which flood calculations are undertaken, it is instead a ...


    By Innovyze

  • Time for a re-examination of sewer design flow criteria

    Each year, many miles of new or rehabilitated sewer lines or pumping stations are designed and constructed based on flow criteria that may be unrelated to the desired level of system performance. Because of the need to reduce the risk of sanitary sewer overflows and sewer backups into buildings, it can be beneficial to re-examine the basis of sewer hydraulic design. Traditional approaches such as ...

  • Water Sustainability

    I7.1  | Water Optimization – 30% Groundwater Use Reduction Tabatha Pellerin, Senior Program Manager, AECOM AECOM assisted the Entergy Lewis Creek gas/coal fired electric power plant with water conservation efforts prompted by a goal of 30% ...

  • Evaluation of environmental flow requirements using eco-hydrologic–hydraulic methods in perennial rivers

    The assessment of environmental flows in rivers is of vital importance for preserving riverine ecosystem processes. This paper addresses the evaluation of environmental flow requirements in three reaches along a typical perennial river (the Zab transboundary river, in north-west Iran), using different hydraulic, hydrological and ecological methods. The main objective of this study came from the ...


    By IWA Publishing

  • Glyphosate and AMPA in drinking water

    Carcinogenic or not? The broad-spectrum herbicide glyphosate is used all over the world in agriculture. Alongside farming, the chemical is also used for weed-killing in domestic gardens and in public and private spaces kept free from «vegetal invasion», such as railway tracks. Glyphosate has been used since the 1970s in pesticides and was hitherto thought to be harmless at ...


    By Metrohm AG

  • Water and vapor movement with condensation and evaporation in a sandy column

    The diffusion of warm, humid air into an initially cold, dry, sandy column was analyzed to study the movement of water vapor and liquid water under nonisothermal and low water content conditions. The analysis was performed using the HYDRUS-1D code. While the water retention curve of sand was measured experimentally, the unsaturated hydraulic conductivity function was inversely estimated from the ...

  • Tailings paste disposal – more than water recovery

    The minerals industry has faced increasing pressures in recent years in the management of tailings streams. Environmental, economic and other factors have led many minerals producers to explore the technology of making and using “paste.” With the increasing number of installations worldwide, this technology has proved to not only be industry accepted, but economically advantageous. ...


    By WesTech Engineering, Inc.

  • Detection of PPT levels of atrazine in drinking water

    MATRIX: Drinking Water ANALYTES: Atrazine LIMIT OF DETECTION: 5 ppt RANGE OF DETECTION: 5 to 500 ppt MATERIALS: Atrazine RaPID AssayÒ Kit and Sample Diluent Reagents: atrazine control (preparation described below), methanol and ethylacetate (pesticide grade) and distilled or deionized ...


  • Power estimation and reliability evaluation of municipal waste water and self–excited induction generator–based micro hydropower generation system

    This paper presents power estimation and reliability evaluation of the micro hydro power generation system based on municipal waste water. Self–excited induction generator was used in the developed power plant, situated at IIT (BHU) campus, Varanasi, India. The hydro potential of the waste water flowing through sewage system of the Banaras Hindu University has been determined for annual flow ...


    By Inderscience Publishers

  • InfoWorks WS helps Wide Bay Water to develop pressure management strategies

    Wide Bay Water Corporation in Queensland, Australia, has used InfoWorks WS to help in the introduction of pressure management strategies to optimize service provision, minimize leakage and dramatically reduce the number of ruptured mains. Australia’s ongoing drought has increased the importance of water-saving measures, including pressure management, says Wide Bay Water Network Modelling ...


    By Innovyze

  • Detection of part per trillion levels of 2,4-d in drinking water

    MATRIX: Drinking water ANALYTES: 2,4-D (2,4-dichlorophenoxyacetic acid) and related phenoxy acids LIMIT OF DETECTION: 70 ppt to 5 ppb (for 10 mL sample), 7 ppt to 0.5 ppb (for 100 mL sample) MATERIALS: 2,4-D RaPID AssayÒ Kit and Sample Diluent Reagents: 2,4-D control (preparation described below), methanol and ...


  • How better weather forecasting can help stretch water supplies

    Reservoir managers look to storm predictions to make smarter choices about dam operations Last year, New York City faced an unusual situation. An epic winter in the city’s Delaware River watershed brought heavy snow and very little rain. Stubborn cold meant there was no snowmelt to refill water-supply reservoirs, even as the city’s 9.5 million residents were draining them dry. A ...


    By Ensia

  • Dams induced stage–discharge relationship variations in the upper Yangtze River basin

    Although stage–discharge relationships are crucial for discharge estimations and hydrological analyses, few efforts have been taken to assess their temporal alterations in the context of dam regulation. Here, the upper Yangtze River basin serves as an example to demonstrate the influence of hydraulic structures on stage–discharge relationships evolution. Daily records of water level and river ...


    By IWA Publishing

  • Joint estimation of hydraulic conductivities of two sand samples in a W-tube system with a bi-exponential response

    The motivation for this paper is the practical problem of interpreting bi-exponential rate-of-rise curves that are observed during many field piezometric tests. In the authors' previous study, a laboratory W-tube system of water flow through two samples of sand was introduced with an adequate mathematical model. The desired bi-exponential character of water flow was obtained by placing two ...


    By IWA Publishing

  • Removal of ammonia by natural clay minerals using fixed and fluidised bed column reactors

    A series of fixed and fluidised bed ion exchange column runs were conducted to identify the ability of natural clay minerals, sepiolite and clinoptilolite, to remove ammonia from a contaminated drinking water reservoir. Ion exchange column tests using both fixed and fluidised bed were initially carried out with synthetic water composed of NH4Cl. Breakthrough curves as a function of flow rate, ...


    By IWA Publishing

  • Temperature Correction Study for HR(PA) Membrane

    Introduction Flow rate testing was performed on MS19 and MS12 elements (217 and 219 elements, 26 mil-spacer) to establish a temperature correction curve for current HR(PA) membranes. The results obtained were evaluated against the existing Osmonics® correction curve and other manufacturers’ information. Salt passage characteristics and the effect of elevated temperature on membrane performance ...

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