sewer simulation Articles

  • Quick and accurate Cellular Automata sewer simulator

    As urbanisation and climate change progress, the frequency of flooding will increase. Each flood event causes damage to infrastructure and the environment. It is thus important to minimise the damage caused, which can be done through planning for events, real-time control of networks and risk management. To perform these actions, many different simulations of network behaviour are required ...


    By IWA Publishing

  • Ability of Preissmann slot scheme to simulate smooth pressurisation transient in sewers

    Urban drainage networks are generally designed to operate in a free-surface flow condition. However, as a consequence of heavy rainfall events or network malfunctions, the filling of sewers (pressurisation) and network overflow may occur. Several modelling software products are commonly used to simulate floods in drainage networks, and their results are usually thought to be reliable and robust. ...


    By IWA Publishing

  • Aerobic and Anaerobic Transformations of Sulfide in a Sewer System – Field Study and Model Simulations

    ABSTRACTThe formation and fate of sulfide in a force main and a downstream-located gravity sewer were investigated in an extensive field study. Sulfide formation during approximately 4 hours of anaerobic transport in the force main was significant. The following gravity sewer was aerobic and a fast reduction of the sulfide concentration was observed due to sulfide oxidation and emission of ...

  • A sewer process model as planning and management tool – hydrogen sulfide simulation at catchment scale

    The collection system of a major city at the Persian Gulf was simulated for bulk water hydrogen sulfide and the release of sewer gas to the urban atmosphere. Geometry data on 870 km of sanitary sewer and data on dry weather flow entering all nodes in the catchment was exported from a Mike Urban database and imported to the sewer process model WATS. The process model then routed sewage and sewer ...


    By IWA Publishing

  • A pattern-oriented approach to development of a real-time storm sewer simulation system with an SWMM model

    This paper documents a real-time storm sewer simulation system (RTS4) in conjunction with a Storm Water Management Model (SWMM) based on a pattern-oriented approach. The RTS4 is initiated by system analysis ascertaining functional requirements, which is sequentially followed by conceptual model, pattern languages, concrete pattern-based design, implementations and applications. The proposed ...


    By IWA Publishing

  • Erosion resistance and behaviour of highly organic in-sewer sediment

    Reliable prediction of time-varying pollutant loads in combined sewer systems during storm periods can aid better management of the release of pollution into natural environments as well as enhancing storage tank design. Better understanding of the behaviour of sewer sediments is crucial for the development of models that adequately describe the transport of in-sewer solids and accurately ...


    By IWA Publishing

  • Different approaches for modelling of sewer caused urban flooding

    The correct prediction of flooding in urban areas is an important challenge to secure the values and fulfil public regulations. Traditional sewer simulations deliver the basic information for a rudimental flood protection, but the interaction between sewer and surface runoff can only be considered by a bi-directional modelling. Therefore detailed information about the relevant structures on the ...


    By IWA Publishing

  • Quantification of sewer leakage by a continuous tracer method

    Water authorities interested in the evaluation of the structural state of a sewer must quantify leakage to plan strategic intervention. However, the quantification of the exfiltration and the localisation of structural damage are challenging tasks that usually require expensive and time-consuming inspections. Herein, we report one of the first applications of the QUEST-C method to quantify the ...


    By IWA Publishing

  • Case study - Muskegon County - Sewer Force Mains

    Service: Sahara Client: Muskegon County Type of Pipeline: Sewer Force Main Diameter: 66-inch Pipe Material: PCCP Length: 8.5 miles 13.7 km In 2007, Muskegon County’s 35-year old large diameter wastewater force main failed catastrophically. Although historical data demonstrated that joint leakage had never contributed to previous events, extensive failure analysis of ...


    By Pure Technologies

  • Factors affecting economies of scale in combined sewer systems

    A generic model is introduced that represents the combined sewer infrastructure of a settlement quantitatively. A catchment area module first calculates the length and size distribution of the required sewer pipes on the basis of rain patterns, housing densities and area size. These results are fed into the sewer-cost module in order to estimate the combined sewer costs of the entire catchment ...


    By IWA Publishing

  • Modeling storage capacity in Amsterdam’s sewer system

    About Waternet Waternet is a joint executive within the Amsterdam City Council and the regional management board Amstel, Gooi en Vecht, undertaking strategy, policy, design, planning, projects and administration for wastewater, groundwater and potable water. The organization controls 12 wastewater treatment plants, 3,500km of stormwater and wastewater pipelines, 500km of pressure pipes, ...


    By Innovyze

  • InfoWorks CS aids Shanghai sewer solutions

    Hydraulic modeling using InfoWorks CS has played a significant role in delivering optimized options for the Shanghai World Bank Loan project - the West Trunk Line renovation project Phase 2, which is part of the World Bank-funded Shanghai Urban Environment ...


    By Innovyze

  • Urine nitrification and sewer discharge to realize in-sewer denitrification to simplify sewage treatment in Hong Kong

    The chemically enhanced primary treatment works in Hong Kong will be upgraded for biological nitrogen removal. This study proposed a novel approach to waive the upgrading by urine source-separation, onsite nitrification and discharge of nitrified urine into sewers to achieve in-sewer denitrification. Human urine was collected and a lab-scale experiment for full urine nitrification was conducted. ...


    By IWA Publishing

  • Different approaches for modelling of sewer caused urban flooding

    The correct prediction of flooding in urban areas is an important challenge to secure the values and fulfil public regulations. Traditional sewer simulations deliver the basic information for a rudimental flood protection, but the interaction between sewer and surface runoff can only be considered by a bi-directional modelling. Therefore detailed information about the relevant structures on the ...


    By IWA Publishing

  • Simplifying impact of urban development on sewer systems

    Linking urban development and urban drainage models is a more and more popular approach when impacts of pavement of urban areas on sewer system performance are evaluated. As such an approach is a difficult task, this is not a feasible procedure for everyday engineering practice. We propose an alternative method, based on a developed simple near-quadratic relationship, which directly translates ...


    By IWA Publishing

  • Washoff behavior of in-sewer deposit in combined sewer system through artificial flushing experiment

    In-sewer deposits in combined sewer systems (CSSs) are closely related with the behavior of first foul flush and combined sewer overflows. However, the research paying attention to the role of in-sewer deposits is quite rare, furthermore, their contributions for the washoff patterns of each pollutant including pathogenic microorganisms are almost never discussed so far. The artificial flushing ...


    By IWA Publishing

  • Simulation of wastewater treatment plant within integrated urban wastewater models

    In the federal state of Hesse in Germany the application of an integrated software modelling framework is becoming part of the planning process to attain legal approval for the operation of combined sewer systems. The software allows for parallel simulation of flow and water quality routing in the sewer system and in receiving rivers. It combines existing pollution load model approaches with a ...


    By IWA Publishing

  • Integration of urban runoff and storm sewer models using the OpenMI framework

    This paper presents an integrated modeling approach that combines the legacy urban runoff and the legacy storm sewer models with data exchange at runtime to simulate sewer flows with real-time rainfalls. A software system called IRES has been developed to demonstrate the proposed approach. IRES uses the RUNOFF and the EXTRAN block of Storm Water Management Model (SWMM) as the legacy urban ...


    By IWA Publishing

  • Modelling the erosive effects of sewer flushing using different sediment transport formulae

    A numerical investigation to simulate the cleaning effects of successive flushes over sediment beds in prismatic channels is presented in this paper. The 1D De Saint Venant-Exner equations were used to describe the temporal evolution of the sediment bed after each flush. The predictive capacity of two sediment transport formulae was explored against experimental results from laboratory tests. ...


    By IWA Publishing

  • Assessment of the effects of greywater reuse on gross solids movement in sewer systems

    Onsite greywater reuse (GWR) and installation of water-efficient toilets (WETs) reduce urban freshwater demand and thus enhance urban water use sustainability. Research on GWR and WETs has generally overlooked their potential effects on municipal sewer systems: GWR and WETs affect the flow regime in sewers, and consequently also influence gross solids transport. To asses these impacts, a gross ...


    By IWA Publishing

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