sewer mapping Articles

  • A new vision on the condition of city of Toronto’s sewer networks

    Situation And Objectives After the amalgamation of Toronto in 1998, Toronto Water – the department in charge of managing the combined infrastructure systems – was mandated to consolidate all underground facilities data and centralize sewer inspection processes on behalf of the newly merged city. Ten years later, a great deal of work in this regard remained undone. It was a ...


    By CTSpec Inc

  • Utility Locating and Mapping at a Power plant case study

    An expansion was planned at a power plant in west central Florida. As part of the design build plan, all of the utilities within the proposed building footprint had to be located and mapped. There were two phases of the investigation. Utility designation was the first phase. This involved studying existing as-builts, performing site walkthroughs with plant personnel in order to ascertain a ...


    By GeoView, Inc.

  • City of Montebello Sewer Master Planning Utilizing Innovative GIS Solutions

    City of Montebello wanted to implement a comprehensive sewer master plan. At the same time they wanted to embark on implementing a GIS program. The solution was to combine the two and utilize the power and versatility of GIS as the core technology for performing the sewer master plan. In this paper we will show how the City accomplished its primary objectives which included: Modernizing its ...

  • An agent-based approach for generating virtual sewer systems

    The application of artificial case studies is a well established technique in urban drainage to test measures, approaches or models. However, the preparation of a virtual case study for a sewer system is a tedious task. Several algorithms have been presented in the literature for an automatic generation of virtual sewer systems. Applying the approach of generating virtual cities by means of the ...


    By IWA Publishing

  • Performance assessment of a vertical flow constructed wetland treating unsettled combined sewer overflow

    The performance of a vertical flow constructed wetland for combined sewer overflow treatment (CSO CW) has been evaluated. The full-scale site has been monitored for 3 years for major pollutants and for two load events for a range of micropollutants (metals, metalloids and polycyclic aromatic hydrocarbons (PAHs)). Performance were predominantly high (97% for total suspended solids (TSS), 80% ...


    By IWA Publishing

  • Prioritising sewerage maintenance using inferred sewer age: a case study for Edinburgh

    The reported research project focuses on using a database which contains details of customer contacts and CCTV data for a key Scottish catchment to construct a GIS based sewer condition model. Given the nature of the asset registry, a key research challenge was estimating the age of individual lengths of pipe. Within this context, asset age was inferred using the estimated age of surface ...


    By IWA Publishing

  • BaSYS 8.0.2 – The Swiss pocket knife for handling sewer or fresh water networks

    An efficient and sustained management of sewer or fresh water systems is a significant task. Any problems with these systems can mean tremendous financial risk for owners and operators of these systems. Such problems can also present large environmental risks. To mitigate such risks a comprehensive application software is needed that can maintain such sewer and fresh water networks. Barthauer ...


    By Barthauer Software GmbH

  • Multivariate probability distribution for sewer system vulnerability assessment under data-limited conditions

    The lack of geometrical and hydraulic information about sewer networks often excludes the adoption of in-deep modeling tools to obtain prioritization strategies for funds management. The present paper describes a novel statistical procedure for defining the prioritization scheme for preventive maintenance strategies based on a small sample of failure data collected by the Sewer Office of the ...


    By IWA Publishing

  • Courtyard-level sewer data-enhanced two-dimensional hydraulic model for urban flood hazard assessment in Kunming, China

    This paper describes a study of urban flooding in downtown Kunming, China, simulating a major flood event that occurred in July 2008 using an improved two-dimensional (2D) hydraulic model enhanced with courtyard-level sewer data (CLSD). Although municipal authorities are not responsible for ‘private’ courtyard sewers, available records were specifically added to this model, ...


    By IWA Publishing

  • SMF4 case study 2

    Sewer Misconnection Survey Date: March 2010 Location: Edgebaston Birmingham UK Purpose: To test the application of the SMF4 portable fluorimeter in the detection and quantification of organic pollution from faecal matter in Surface water Sewers. Background STS was invited independently by the Environment Agency and Severn ...

  • Planning for the Unthinkable Risk Assessment and Emergency Response Planning for Catastrophic Events District of Columbia Water and Sewer Authority (DC WASA)

    ABSTRACTManager’s decision capabilities can be improved through a better understanding of a system’s inter-dependability. Communication and planning during non-emergency periods enable managers and engineers to review the impacts that would be expected during several scenarios, and what system improvements could be made to minimize those impacts. The plan that DC WASA developed helped managers ...

  • Utility locating at a Gasoline station case study

    As part of an Phase II Environmental Site Assessment at a gasoline station, GeoView was tasked with locating and mapping the  utilities within the boundaries of the property. The utilities included electrical lines, communication lines, PVC and metal water lines, sewer lines and fiberglass fuel lines. The property did not have any as-builts to reference. As standard procedure, GeoView ...


    By GeoView, Inc.

  • Improving the Operations and Maintenance of Wastewater Infrastructure with Knowledge Management Systems

    ChallengesFort Campbell, Kentucky is an active military facility that serves a dynamic population of up to 50,000 military and civilian personnel. The collection system assets include a 5 MGD treatment plant, 79 pump stations, 100 miles of gravity and force main sewers, and over 100 miscellaneous structures including oil/water separators and grease traps. Like many communities – this ...

  • An Update on Louisville MSD`s Basement Backflow Prevention Program - 10 Years and 6,700 Installations Later

    ABSTRACTLouisville and Jefferson County Metropolitan Sewer District (MSD) is responsible for stormwater and wastewater service for the Louisville, Kentucky metropolitan area. A longstanding problem for MSD has been basement flooding due to sewers that are surcharged from wet weather. A non-traditional program was developed by MSD as a means to address this problem in a cost effective and timely ...

  • Quantitative pipe condition assessment with Pipe Penetrating Radar

    Abstract Pipe Penetrating Radar (PPR) is the underground in-pipe application of GPR, a non-destructive testing method that can detect defects and cavities within and outside mainline diameter (>18 in / 450mm) non-ferrous (reinforced concrete, vitrified clay, PVC, HDPE, etc.) pipes. The key advantage of PPR is the unique ability to map pipe wall thickness and deterioration including voids ...


    By SewerVUE

  • Development of the Stormwater Information System that protects life and property from floods

    The Stormwater Information System distributes storm pump operating conditions, etc. to residents in real time via the Internet utilizing a private network that employs optical fibers installed in sewer pipes. Information to be distributed includes advisory and warning information relating to weather data, weather radar information, river information, emergency disaster information, refuge maps, ...

  • High quality data and optimized report delivery, powering competitiveness

    Situation And Objectives Veolia ES, a global leader in environmental management, operates a division in Québec responsible for the inspection of underground infrastructure systems; specifically sewer systems. The division has two offices: one in Montreal, another in Quebec City. In 2007 when Veolia® first started looking into the possibility of teaming up with CTSpec, the ...


    By CTSpec Inc

  • Flood Improvement and LID Modeling Using XP‐SWMM

    Introduction First developed in 1971, the EPA's Storm Water Management Model (SWMM) has been widely used in urban areas for planning, analysis, and design related to stormwater runoff, combined sewers, sanitary sewers, and other drainage systems. XP‐SWMM, published by XP Solutions Inc., uses the EPA SWMM model as the primary runoff hydrograph simulator for runoff quantity and quality. ...


    By Innovyze

  • Gwinnett County Find-and-Fix - Case Study

    When Gwinnett County opted to use a find-and-fix approach to repairing inflow and infiltration entering its collection system, the Inliner Technologies team set out to investigate and rehabilitate the sewer system in predetermined basins. To obtain immediate results the team used existing data, including GIS, previously collected data, and information from discussions with Gwinnett County field ...


    By Inliner Technologies, LLC

  • Risk assessment study for water supply network using GIS

    In recent years, contamination of water in water distribution systems (WDS) has been recognized as a major cause of waterborne diseases. Owing to old and deteriorated pipes, and the presence of pollution sources in contact with the supply line, water boards often decide to replace the network in the interests of public health. This being a cost-intensive and time-consuming programme, decision ...


    By IWA Publishing

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