drainage system Articles

  • City drainage in ancient China

    This paper gives an overview of the evolution of city drainage in ancient China, and analyzes the achievement of drainage of such cities as Pingliangtai in Henan province, Xibo of Shang Dynasty, Linzi, the capital of the State of Qi, Chang'an, the capital of Han and Tang Dynasties, Kaifeng, the Eastern Capital of Northern Song Dynasty, Ganzhou, Dadu, the capital of Yuan Dynasty; and Beijing, the ...


    By IWA Publishing

  • Past, present, and future design of urban drainage systems with focus on Danish experiences

    Climate change will influence the water cycle substantially, and extreme precipitation will become more frequent in many regions in the years to come. How should this fact be incorporated into design of urban drainage systems, if at all? And how important is climate change compared to other changes over time? Based on an analysis of the underlying key drivers of changes that are expected to ...


    By IWA Publishing

  • Multi-objective rehabilitation of urban drainage systems under uncertainties

    Urban drainage systems are subject to many drivers which can affect their performance and functioning. Typically, climate change, urbanisation and population growth along with aging of pipes may lead to uncontrollable discharges and surface flooding. So far, many researchers and practitioners concerned with optimal design and rehabilitation of urban drainage systems have applied deterministic ...


    By IWA Publishing

  • Dropshaft cascades in urban drainage systems

    Dropshaft cascades are typical elements of sewer systems in steep urban catchment basins. The design of a dropshaft cascade, which is generally addressed as an optimization problem, also needs to consider the subsequent effects induced on the flow by the different elements of the cascade. Experimental research has been performed at the hydraulic engineering laboratory of the University of ...


    By IWA Publishing

  • Modelling overland flows and drainage augmentations in Dubbo - Case Study

    Introduction: Dubbo has experienced a number of overland flooding problems at several locations within the city. Council had formulated possible augmentation works to address the problems and was keen to confirm that the proposed works would address the local flooding problems. The drainage system in Dubbo faces a number of challenges due to the relatively flat grades on ...


    By Innovyze

  • An integrated cellular automata evolutionary-based approach for evaluating future scenarios and the expansion of urban drainage networks

    The paper describes and demonstrates an integrated cellular automata evolutionary-based approach for evaluating future scenarios including the expansion of urban drainage networks. The approach can be used to derive a drainage network layout based on future land use scenarios. Two techniques are used to derive the layout of the system: one using agent-based modelling and the other using similar ...


    By IWA Publishing

  • Cost benefit analysis

    Flooding protection measures are often expensive. A cost benefit analysis can help to prioritise flood protection measures. Within the SAWA project an approach for cost benefit analysis (CBA) of flooding protection was developed (find the description under case studies below). In the following, some aspects to consider making a CBA are shown and some difficulties are pointed out. Compared with ...


    By IWA Publishing

  • Urban drainage system planning and design – challenges with climate change and urbanization: a review

    Urban drainage systems are in general failing in their functions mainly due to non-stationary climate and rapid urbanization. As these systems are becoming less efficient, issues such as sewer overflows and increase in urban flooding leading to surge in pollutant loads to receiving water bodies are becoming pervasive rapidly. A comprehensive investigation is required to understand these factors ...


    By IWA Publishing

  • GIS applications in urban drainage master planning - Case Study

    Introduction: The City of Stratford, Ontario, located 150 km (94 mi.) west of Toronto, initiated the development of an infrastructure asset database in the early 1990’s and continues to develop digital mapping to support the maintenance and management of municipal services. In continuing these efforts, the City initiated the City-Wide Storm System Master Plan (the Study) in ...


    By Innovyze

  • Drainage System Stabilization Project case study

    In 1997, a residential development was built upslope from this golf course drainage ditch. It began to erode, but because the ditch was filled with invasive species such as Blackberry and Reed Canary Grass, the erosion was not visible. When the non-native plants were removed to create a new golf course hole, the erosion was evident – in some places more than four feet deep, all the way ...


    By Envirolok LLC

  • Performance assessment of separate and combined sewer systems in metropolitan areas in southern China

    To assess the performance of urban drainage systems in metropolitan areas in southern China, 12 urban drainage systems, including nine separate sewer systems (SSSs) and three combined sewer systems (CSSs) were monitored from 2008 to 2012 in Shanghai and Hefei. Illicit connection rates of SSS were determined. The results indicate that serious illicit connections exist for most SSSs. Annual volume ...


    By IWA Publishing

  • Enlightenment from ancient Chinese urban and rural stormwater management practices

    Hundreds of years ago, the ancient Chinese implemented several outstanding projects to cope with the changing climate and violent floods. Some of these projects are still in use today. These projects evolved from the experience and knowledge accumulated through the long coexistence of people with nature. The concepts behind these ancient stormwater management practices, such as low-impact ...


    By IWA Publishing

  • An integrated modeling approach to predict flooding on urban basin - Case Study

    Introduction: Flooding on urban basins is intensifying due to rapid urbanization. Flooding primarily occurs because of drainage congestion of inland flow and/or over bank flow of river during severe rainfall event. Rapid urbanization is causing a major change in rainfall-runoff phenomenon and the drainage system as well. The overland flow pattern is becoming complex due to huge ...


    By Innovyze

  • B 239 Herford bypass case study

    Secudrain WAS 7 as vertical drainage system The B 239 Herford bypass was planned and put out for tender in three sections by the Minden branch of the state highway authorities for road constructions in North-Rhine Westphalia, Germany. The contract for the third section was awarded to a joint venture between Bickhardt Bau AG and Bickhardt Bruckenund Ingenieurbau GmbH in ...


    By NAUE GmbH & Co.KG

  • Heap leach drainage design

    Heap leach operations have gained popularity in the past around the world as a reasonable method for extracting metals such as gold, copper, and nickel from earth material. In such heap operations, however, the success of the leaching operation depends on the flow regime established by the sprinklers at the top of each lift and the drainage system at the bottom.Each lift represents a unique ...


    By SoilVision Systems Ltd.

  • Cadbury Schweppes - Case Study

    The effluent now initially treated by the Forbuster system efficiently removes the solid debris before de-oiling the effluent. Wedge wire screen now works as designed to remove fine solids and carbon from the ovens. All downstream processes operating at peak efficiencies. Site is now compliant with the effluent standards required, odor was dispelled and sludge haulage costs significantly reduced. ...


    By FogBusters, Inc.

  • 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

  • Wastewater Treatment Facility Rehabilitation Arrowhead Sewer Company, Inc. Pocono Lake, Pennsylvania

    Arrowhead Sewer Company, Inc. hired Princeton Hydro, LLC to provide engineering services to reinstall an inflow Equalization Tank that floated due to unforeseen groundwater conditions. Given site and layout restrictions, Princeton Hydro designed groundwater and overland flow control elements to buffer the tank from groundwater uplift. The system consisted of two main parts: a diversion channel to ...


    By Invisible Structures, Inc.

  • An appraisal of the qualifying role of hydraulic heritage systems: a case study of Qanats in central Iran

    Hydraulic heritage systems, both underground and exposed, have been known to be sustainable for millennia. Persian and also Roman aqueducts are examples of such hydrosystems. Their value is often overlooked but they have undeniable advantages: they have functional interconnectedness with their surrounding society and ecology, which sometimes leads to revitalization plans. By using the notion ...


    By IWA Publishing

  • Comparative analysis of the outflow water quality of two sustainable linear drainage systems

    Three different drainage systems were built in a roadside car park located on the outskirts of Oviedo (Spain): two sustainable urban drainage systems (SUDS), a swale and a filter drain; and one conventional drainage system, a concrete ditch, which is representative of the most frequently used roadside drainage system in Spain. The concentrations of pollutants were analyzed in the outflow of all ...


    By IWA Publishing

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