storm event peak runoff Articles

  • Rainfall, Runoff and Infiltration Re-visited

    Introduction The flow variations in sewers have been modelled for several years with a comparatively high degree of accuracy as far as the diurnal variations and responses to climatic conditions are concerned. However, until comparatively recently the variations in flow due to fluctuations in groundwater levels, soil storage capacity and wetness of the catchment have only been modelled in basic ...


    By Innovyze

  • Compost in the mix for storm water management

    Bioretention areas, also known as rain gardens, are increasingly being used to capture and treat storm water runoff from impervious surfaces such as roofs, sidewalks and parking lots. These landscaped areas often feature native plants installed in an engineered soil mixture that includes compost. “Bioretention areas or rain gardens are an attractive storm water Best Management Practice (BMP) ...


    By BioCycle Magazine

  • Performance evaluation and a sizing method for hydrodynamic separators treating urban stormwater runoff

    This study reports on 6 years of performance monitoring of stormwater hydrodynamic separators in Korean urban catchments. One hundred and thirty-seven storm events were monitored in four hydrodynamic separators of two different types from 2006 to 2012. Mean values of the event average removal efficiencies of total suspended solids (TSS) for the four hydrodynamic separators were 43.69, 8.54, ...


    By IWA Publishing

  • Levels and patterns of fecal indicator bacteria in stormwater runoff from homogenous land use sites and urban watersheds

    Routine stormwater monitoring programs focus on quantification of average fecal indicator bacteria (FIB) concentration at the terminal watershed discharge point. While important for permit compliance, such monitoring provides little insight into relative bacteria levels from different land use types or the mechanisms that influence FIB concentrations. The goal of this study was to quantify the ...


    By IWA Publishing

  • Effects of pyrethroid insecticides in urban runoff on chinook salmon, steelhead trout, and their invertebrate prey

    Pyrethroid insecticides can affect salmonids either indirectly through toxicity to their prey or directly by toxicity to the fish themselves. In support of a study on pyrethroid impacts to Chinook salmon and steelhead trout in the American River (Sacramento, California), 96‐h EC50 and LC50 values for the pyrethroid bifenthrin were determined for taxa not traditionally used for toxicity testing ...


    By John Wiley & Sons, Ltd.

  • Analysis of effects of climate change on runoff in an urban drainage system: a case study from Seoul, Korea

    Both water quantity and quality are impacted by climate change. In addition, rapid urbanization has also brought an immeasurable loss of life and property resulting from floods. Hence, there is a need to predict changes in rainfall events to effectively design stormwater infrastructure to protect urban areas from disaster. This study develops a framework for predicting future short duration ...


    By IWA Publishing

  • OSU Researchers Deploy Stevens Equipment in Study of Green Infrastructure Treatment for Groundwater Runoff

    Stormwater runoff pollution is a serious issue that faces almost every urban and suburban environment. In older city infrastructure, runoff from roofs, parking lots, and streets flows directly into the sewer system and must be handled by the municipal wastewater treatment facility, increasing the amount of work the system must undertake. For the past 30 years, the infrastructure for stormwater ...

  • Level and transport pattern of faecal coliform bacteria from tropical urban catchments

    Urbanization and frequent storms play important roles in increasing faecal bacteria pollution, especially for tropical urban catchments. However, only little information on the faecal bacteria levels from different land use types and the factors that influence bacteria concentrations is available. Thus, the objectives of this study were to quantify the levels and transport mechanism of faecal ...


    By IWA Publishing

  • Relationships between rainfall intensity, duration and suspended particle washoff from an urban road surface

    A basic understanding of the relationships between rainfall intensity, duration of rainfall and the amount of suspended particles in stormwater runoff generated from road surfaces has been gained mainly from past washoff experiments using rainfall simulators. Simulated rainfall was generally applied at constant intensities, whereas rainfall temporal patterns during actual storms are typically ...


    By IWA Publishing

  • Spatially Distributed Hydrological Modeling considering Land-use changes using Remote sensing and GIS

    Distributed hydrological modeling considering spatial variability using remote sensing, and GIS is developed to assess the changes in runoff value due to land use change in a hydrological basin. Kathmandu Valley basin, Nepal, is chosen as a basin of case study. In this paper, a spatially distributed model with SCS curve number is developed to assess the runoff changes due to land-use changes. It ...


  • Stormwater input of pyrethroid insecticides to an urban river

    The American River flows for nearly 50 km through highly urbanized lands surrounding Sacramento, California, USA. Twenty‐three streams, drainage canals, or pumping stations discharge urban runoff to the river, with the cumulative effect of nearly doubling the river's flow during rain events. During winter storms, the water column in the most downstream 13‐km reach of the river exhibited toxicity ...


    By John Wiley & Sons, Ltd.

  • Challenges of Modeling a Tidal Influence Conveyance System, a Seattle, Washington Case Study

    Hydraulic modeling of a drainage basin usually involves system representation of a network that flows either by gravity downhill or a force main via an outfall to a receiving water body or a treatment plant. And calibration of such a system is usually straight forward. Occasionally, engineers encounter a “City of New Orleans” type of conveyance system, where most of the storm drain network is ...

  • Fate of hydrocarbon pollutants in source and non-source control sustainable drainage systems

    Sustainable drainage (SuDs) is an established method for managing runoff from developments, and source control is part of accepted design philosophy. However, there are limited studies into the contribution source control makes to pollutant removal, especially for roads. This study examines organic pollutants, total petroleum hydrocarbons (TPH) and polycyclic aromatic hydrocarbons (PAHs), in ...


    By IWA Publishing

  • Analysis on LID for highly urbanized areas’ waterlogging control: demonstrated on the example of Caohejing in Shanghai

    Although a commonly applied measure across the United States and Europe for alleviating the negative impacts of urbanization on the hydrological cycle, low impact development (LID) has not been widely used in highly urbanized areas, especially in rapidly urbanizing cities in developing countries like China. In this paper, given five LID practices including Bio-Retention, Infiltration Trench, ...


    By IWA Publishing

  • Can stormwater harvesting restore pre-development flows in urban catchments in South East Queensland?

    Increases in the impervious area due to urbanisation have been shown to have negative impacts on the physical and ecological condition of streams, primarily through increased volume and frequency of runoff. The harvesting and detention of runoff has a potential to decrease this impact. This paper describes the effects of urbanisation on catchment flow and of stormwater harvesting on reducing ...


    By IWA Publishing

  • 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

  • Lake supply & treatment expansion

    Client: City of Fort Smith Completion Date: 2003 - Design2006 - Lake construction2008 - Plant construction Services Provided Supply reservoir enlargement 30 million-gallon-per-day (MGD) water plant renovation New 20-MGD dual train water plant addition Pulsating clarifiers ...


    By Burns & McDonnell

  • Soil Filters

    Soil filters (in german: Retentionsbodenfilter) are facilities for the removal of nutrients and/or pollutants; typically on the level of an industrial site, a quarter or a drainage system (sub-)catchment. Usually they are located at the discharge points to surface waterbodies to ensure water quality standards. Soil filters consist of two parts: The first part is a retention pond or basin for ...


    By IWA Publishing

  • What is so hard about drainage modeling?

    Drainage modeling often suffers from the misconception that it is simple, but while it appears obvious that rain water will flow to the lowest point, the physical processes involved are not always well-understood or predictable. Drainage models attempt to predict that part of the water cycle that involves rainfall and its consequences, including potential flooding. Although flooding is, at its ...


    By Innovyze

  • Stormwater drainage analysis and design in Victoria, Australia

    Untitled Document Victoria, Australia Wallingford Software's ...


    By Innovyze

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