inflow protection Articles

  • Determining the effects of freshwater inflow on benthic macrofauna in the Caloosahatchee Estuary, Florida

    Florida legislation requires determining and implementing an appropriate range and frequency of freshwater inflows that will sustain a fully functional estuary. Changes in inflow dynamics to the Caloosahatchee Estuary, Florida have altered salinity regimes which in turn have altered the ecological integrity of the estuary. The purpose of this current project is to determine how changes in ...


    By John Wiley & Sons, Ltd.

  • Biofilter design for effective nitrogen removal from stormwater – influence of plant species, inflow hydrology and use of a saturated zone

    The use of biofilters to remove nitrogen and other pollutants from urban stormwater runoff has demonstrated varied success across laboratory and field studies. Design variables including plant species and use of a saturated zone have large impacts upon performance. A laboratory column study of 22 plant species and designs with varied outlet configuration was conducted across a 1.5-year period to ...


    By IWA Publishing

  • Geothermal plant protects pumps - case study

    This large geothermal company needed reliable equipment in the deserts of southeastern California. Geothermal plants turn water into to steam to drive turbines. Protecting the pumps is paramount. Keeping the inflowing water clean of debris and marine life, an IWS traveling water screen provides reliable removal with minimal labor. Debris is lifted from the water, and dropped directly into a ...


    By International Water Screens

  • High quality bathing water protects human health

    The sewage treatment plant of Biarritz, France faced severe issues with inflowing water during heavy rain fall, resulting in untreated wastewater being diverted directly into the sea, alongside public beaches. A fast and reliable disinfection of the flow was needed. Kemira installed DesinFix disinfection technology which is designed for water reuse, and to handle such problematic flows ...

  • Protecting Homes from Sewage Backup - Metropolitan Sewer District of Greater Cincinnati’s Water in Basement Prevention Program

    ABSTRACT Many customers of the Metropolitan Sewer District of Greater Cincinnati (MSDGC) have experienced basement backup due to surcharging of the sanitary and combined sewer systems. The surcharging was caused by excessive infiltration and inflow entering the sanitary sewer system and a lack of capacity in the combined sewer system. As part of the Consent Decree that MSDGC signed with the ...

  • Modelling sewer sediment deposition, erosion, and transport processes to predict acute influent and reduce combined sewer overflows and CO2 emissions

    Understanding of solids deposition, erosion, and transport processes in sewer systems has improved considerably in the past decade. This has provided guidance for controlling sewer solids and associated acute pollutants to protect the environment and improve the operation of wastewater systems. Although measures to decrease combined sewer overflow (CSO) events have reduced the amount of ...


    By IWA Publishing

  • A generic hydrological model for a green roof drainage layer

    A rainfall simulator of length 5 m and width 1 m was used to supply constant intensity and largely spatially uniform water inflow events to 100 different configurations of commercially available green roof drainage layer and protection mat. The runoff from each inflow event was collected and sampled at one-second intervals. Time-series runoff responses were subsequently produced for each of the ...


    By IWA Publishing

  • Screentec success story - the Lower Township, NJ case study

    New Jersey’s Lower Township Municipal Utilities Authority had a problem. The utilities authority operates a 5 MGD plant, with wastewater inflow arriving through a 48-in pipe routed 23 feet below grade level. Their manual inflow pump screening setup was difficult and hazardous to clean, and its 2.5” screen spacing let entirely too much non-dispersible waste through. Their 3,000 GPM ...


    By Aqualitec Corp.

  • Multifaceted sewer improvements program eliminates sewer connection moratorium and system overflows

    The sewer system serving Borough of Jewett City, Connecticut dates from the late 1800’s and was originally constructed as a combined sewer system with the discharges directed to the area rivers. In the 1970’s, the raw sewage discharges from the Borough system were removed from the rivers and redirected to a newly constructed wastewater treatment facility. However, the overflows from the ...

  • BL BioDisc treatment plant + Grease Trap serving a hotel /restaurant – Scottish Highlands

    Site DescriptionA country hotel/restaurant, Scottish Highlands RequirementsWaste produced by various sources – Kitchen, toilets, residential quarters, laundry room. Installation dateMay 2005 ProductBioDisc BL, Grease Trap. NotesThe waste produced by this hotel was a cocktail of sewage, ...

  • Biodiversity and its conservation in the Sundarban Mangrove Ecosystem

    Abstract.  The Sundarban, covering about one million ha in the delta of the rivers Ganga, Brahmaputra and Meghna is shared between Bangladesh (~60%) and India (~40%), and is the world’s largest coastal wetland. The area experiences a subtropical monsoonal climate with an annual rainfall of 1,600–1,800 mm and severe cyclonic storms. Enormous amounts of sediments carried by the rivers ...


    By Springer

  • Reaping the Rewards of Restoration case study

    Deteriorating infrastructure continues to plague municipalities across the U.S., compromising local budgets and natural resources. Utility officials nationwide are actively searching for innovative strategies to circumvent these problems. When the Cary ville-Jacksboro Utility Commission (CJUC), located 36 miles north of Knoxville, Tenn., began restoring its collection system, it successfully ...


    By Mission Communications, LLC

  • Sustainable Water Resources and Regional Cooperation: The LCRA-SAWS Water Project

    ABSTRACTThe lower Colorado River basin in Texas and the San Antonio region both face long-term water shortages. Cities, farmers, businesses, recreation and the environment are competing for water supplies as never before. As part of the regional water supply planning process in Texas, the Lower Colorado River Authority (LCRA) and the San Antonio Water System (SAWS) both realized the need to ...

  • Trouble Shooting for Trenchless Liner Installation During Sewer Line Rehabilitation

    ABSTRACTLining is being used by the utility industry as a cost effective solution to rehabilitate utility lines. Many types of liners, such as, cured-in-place-pipe (CIPP), fold and form PVC, deformed & reformed HDPE, etc., are being used to restore structural integrity of deteriorated pipes and to reduce inflow/infiltration. Most of the lining installation is carried out without any problem, ...

  • New processes for the improvement of sludge digestion and sludge dewatering

    INTRODUCTIONThe examination of numerous sewage sludges from municipal wastewater treatment plants leads to the conclusion that on the one hand dewaterability of these sludges worsens and that on the other hand dewaterability of sludges becomes more and more important due to increasing disposal costs. Especially wastewater treatment plants with inflows from the food processing industry often face ...


    By Cambi AS

  • Fish out of water — marine management in a changing climate

    A fisherman's tale: on the night of 6 October 1986 lobster fishermen from the small town of Gilleleje, north of Copenhagen, fishing the Kattegat Sea, found their nets crammed with Norway lobster. Many of the animals were dead or dying. About half were a strange colour. Observations of dissolved oxygen in the water in combination with the dead lobsters told researchers at the National ...

  • Developing dry-weather flow and RDI/I models using regression analysis and unit hydrography

    InfoWorks CS has been used to build an accurate sanitary sewer flow model for Jefferson Parish, Louisiana, despite there being gaps in the available input data. Reliable predictions of the dry-weather and rainfall-dependent flows were derived by using techniques including unit hydrography and regression analysis to determine the required parameters. Jefferson Parish is close to New Orleans in the ...


    By Innovyze

  • Wastewater Treatment: Overview and Background

    SummaryWaste discharges from municipal sewage treatment plants are a significant source of water quality problems throughout the country. States report that municipal discharges are the main source of impairment to estuaries and coastal waters, the second leading source of impaired rivers and streams, and also are a major source of pollution in lakes. Pollutants associated with municipal ...


  • Assessment and improvement planning for the Rochdale South sewerage system

    Rochdale South is a predominantly residential suburb south of the Queensland capital city of Brisbane. It has a total population of 10,680 and a sewerage system catchment area of 580ha. The sewerage system includes five pumping stations which forward sewage flows to a downstream treatment plant. Rochdale South comes under the jurisdiction of Logan City Council, and Logan Water is the body that ...


    By Innovyze

  • Use of InfoWorks CS to build an integrated urban drainage model

    Creation of a single integrated InfoWorks CS model covering foul, surface and river systems is proving invaluable in understanding the complex interactions within a flood-prone urban catchment in north west London. The three systems had originally been held in separate models, with the foul and surface networks each modeled in InfoWorks CS and the rivers in ISIS. “There has been a lot of careful ...


    By Innovyze

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