Drainage Systems Articles

  • Up-scaling sanitation provision using mixed design methodologies and failure risk assessment: a case study of Marikuppam, India

    Simplified sewerage provides an improved alternative to single user on-site options in peri-urban areas in India, and contributes to the aim of reducing the need for human handling of waste (manual scavenging), and the Government's goal of making India open defecation free by 2019. This research develops a mixed methodologies approach to design, optimise and assess failure risk for a proposed ...


    By IWA Publishing

  • 10 Questions you need to ask yourself before buying a Steel Storage Unit?

    These are the 10 questions to ask yourself before buying a drum or IBC Storage unit: What liquids are you looking to store? How many litres of each liquid do you want to store? What size and number of drums and IBC’s will require storage? Are the products to be stored indoors or outdoors? If indoors, are there any access issues or internal drainage ...


    By Spill Doctor (SA)

  • Velocity-based analysis of sediment incipient deposition in rigid boundary open channels

    Drainage systems must be designed in a way to minimize undesired problems such as decrease in hydraulic capacity of the channel, blockage and transport of pollutants due to deposition of sediment. Channel design considering self-cleansing criteria are used to solve the sedimentation problem. Incipient deposition is one of the non-deposition self-cleansing design criteria that can be used as a ...


    By IWA Publishing

  • Flood forecasting within urban drainage systems using NARX neural network

    Urbanization activity and climate change increase the runoff volumes, and consequently the surcharge of the urban drainage systems (UDS). In addition, age and structural failures of these utilities limit their capacities, and thus generate hydraulic operation shortages, leading to flooding events. The large increase in floods within urban areas requires rapid actions from the UDS operators. ...


    By IWA Publishing

  • Investigation into the long-term stormwater pollution removal efficiency of bioretention systems

    In recent years, there has been a steady increase in the number of bioretention systems installed worldwide. However, there has only been limited research on the long-term effectiveness of these sustainable urban drainage system devices. This paper presents the results of a series of controlled field experiments investigating the pollutant removal efficiency of three, 10-year-old, ...


    By IWA Publishing

  • The drainage of lake ‘L'Estany’ in Spain

    In the 18th century, the practice of drying up the wetlands, marshy or stagnant water areas expanded throughout Europe in order to avoid the malaria fevers that the population periodically suffered and to recover land for farming. This communication describes the current knowledge about the history of the process of drying in various hydrological basins as well as the works in the endorheic ...


    By IWA Publishing

  • Drain stub bore hole cracking - Case study

    Purpose This plant service bulletin alerts customers to inspect drain line stub bore holes for radial cracking. Problem Numerous incidents have been reported of header cracking caused by water quenching the drain line stub bore hole and header ID, especially reheater headers. This problem occurs when drain lines from boiler, superheater and reheater headers of a ...


    By Dürr Megtec LLC

  • Hydrodynamic Modeling of SuDS (BMPs or LIDs) schemes - Case Study

    La Marina is an urban area within the Municipality of Elche (South of Alicante, on the Mediterranean Spanish coast), that is rapidly growing. This growth leads to an increase of impervious surfaces, which generate greater run-off volumes with deteriorated water quality. ...


    By XP Solutions

  • Green Streets@Haringey Retrofitting SuDS Study - Case Study

    Haringey, UK Greater London Authority, London Borough of Haringey Complete AECOM was commissioned by the Greater London Authority (GLA) to produce a pilot Sustainable Drainage Systems (SuDS) retrofitting study. This was to include conceptual retrofit sustainable drainage designs for one of two existing communities currently at risk of flooding. ...


    By XP Solutions

  • Estimating instantaneous peak flow from mean daily flow

    We revisited three traditional methods and proposed a slope-based method, which all require only mean daily flow (MDF) records as inputs, to estimate instantaneous peak flows (IPFs). We applied these methods to 144 basins in Iowa, USA, with drainage areas in the range 7–220,000 km2. This application involves ∼3,800 peak flow events triggered by snow-melting and rainfall over the period from ...


    By IWA Publishing

  • Flood control in an urban drainage system using a linear controller

    Effective management of floods in densely populated urban areas poses a great challenge. Computer modeling plays an important role in appropriate management of urban drainage systems. In this study an effort has been made to develop an efficient urban drainage model in which hydraulic results obtained from the developed SWMM model have been linked with a Proportional Integral Derivative (PID) ...


    By IWA Publishing

  • Case study - They said it could not be done…

    The Challenge - Access through Swamp Land. MEG Energy oil-sands mining operations at the Christina Lake complex in Alberta are undergoing a large expansion phase. The plan includes new wells, processing, operations, storage and treatment facilities, and of course new roads connecting them altogether. MEG Energy Project Canada The problem was the Muskeg peat bog. This saturated, ...


    By PRS Geo-Technologies

  • Case study - Airport platform

    Mexico City's international airport was built over a lake; the soil is expansive clay with water content approaching 200%. Settlement is a severe problem and several airport runways necessitated a 4m asphalt layer thickness. A recently constructed airport platform using a conventional pavement was expected to settle 3 cm at the 3 vertical loading points of the airplane over two years. In fact it ...


    By PRS Geo-Technologies

  • How to Choose a Site for a Shipping Container

    In our Renters Guide, we discussed many things to consider when renting or leasing a storage/shipping container.  Once you’ve made the decision that you need a shipping container, you will need to figure out where to place it.   There are a number of factors to consider when choosing a site.  They include: Accessibility ...


    By Pac-Van, Inc.

  • Study offers first-ever map showing groundwater pollution of coastal areas of United States

    The study identified 12 percent of the continental U.S. coastline — including the northern Gulf Coast from Mississippi to the Florida Panhandle, northern Atlantic Coast, and Pacific Northwest — where the once-hidden drainage systems make the ocean most susceptible to freshwater contamination from septic tanks and fertilizer runoff. In contrast, another 9 ...

  • Assessment of some combinations of hard and fuzzy clustering techniques for regionalisation of catchments in Sefidroud basin

    Cluster analysis methods are a type of well-known technique for regionalisation of catchments to perform regional flood frequency analysis. In this study, a fuzzy extension of hybrid clustering algorithms is evaluated. Self-organizing feature maps and four hierarchical clustering algorithms were used to provide the initial cluster centres for fuzzy c-means (FCM) algorithm. The hybrid approach ...


    By IWA Publishing

  • Phosphorus sorption kinetics and sorption capacity in agricultural drainage ditch sediments in reclaimed land, Kasaoka Bay, Japan

    Equilibrium analysis is essential to evaluate sorption capacity and to determine whether sediment acts as a source or sink of phosphorus (P). This study was carried out to determine whether or not the sediment in drainage ditches acts as a source or sink of P, evaluate phosphorus sorption kinetics, and determine the potential P sorption by using the Langmuir isotherm sorption model. Surface ...


    By IWA Publishing

  • Correlation analysis and threshold value research on the form and function indexes of an urban interconnected river system network

    As urbanization has accelerated, the form of river and lake systems has changed greatly in cities, which has caused variations in the functioning of the interconnected river system network (IRSN). To quantitatively evaluate the influence of the urbanization process on IRSN, the form index system and function index system were established in this study. The form index system involved eight ...


    By IWA Publishing

  • Pipeline Collapse Shows Urgent Need for Two-Way Air Valves

    The recent catastrophic collapse of a pipeline at a $10 million project in Central America is clear proof that current procurement of air valves needs to be urgently reviewed. Plus, this latest incident was actually caused by not having any air valves at all, which was a disastrous oversight by the consultant. However, in an increasing number of cases, it is not the end-user or the contractor at ...


    By Modern Pumping Today

  • Enumeration of sulphate-reducing bacteria for assessing potential for hydrogen sulphide production in urban drainage systems

    Urban drainage structures have increasing demands which can lead to increasing hydrogen sulphide related problems forming in places where they have not previously been prevalent. This puts pressure on the methods currently used to monitor and diagnose these problems and more sophisticated methods may be needed for identifying the origin of the problems. Molecular microbiological techniques, ...


    By IWA Publishing

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