The first flush in sewer systems

Saget, Agnès; Chebbo, Ghassan; Bertrand-Krajewski, Jean-Luc

doi:10.2166/wst.1996.0186

Cited by 83 publications

(64 citation statements)

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“…In understanding the first flush, the major difficulty arises with respect to defining this phenomenon in a quantitative manner. As Bertrand-Krajewski et al, (1998) and Saget et al, (1996) have pointed out, the problem stems from the fact that the 'initial component of runoff' which carries the first flush is never precisely defined. This is despite its commonly reported occurrence in qualitative terms.…”

Section: The Management Dilemmamentioning

confidence: 99%

Understanding the role of land use in urban stormwater quality management

Goonetilleke

Thomas

Ginn³

et al. 2005

Journal of Environmental Management

292

144

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Urbanisation significantly impacts on water environments with increased runoff and the degradation of water quality. The management of quantity impacts are straight forward, but quality impacts are far more complex. Current approaches to safeguard water quality are largely ineffective and guided by entrenched misconceptions with a primary focus on 'end-of-pipe' solutions. The outcomes of a research study presented in the paper, which investigated relationships between water quality and six different land uses offer practical guidance in the planning of future urban developments. In terms of safeguarding water quality, high density residential development which results in a relatively smaller footprint would be the preferred option. The research study outcomes bring into question a number of fundamental concepts and misconceptions routinely accepted in stormwater quality management. The research findings confirmed the need to move beyond customary structural measures and identified the key role that urban planning can play in safeguarding urban water environments.Keywords: multivariate analysis, stormwater quality management, urban water quality, water quality impacts 3

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Section: The Management Dilemmamentioning

confidence: 99%

Understanding the role of land use in urban stormwater quality management

Goonetilleke

Thomas

Ginn³

et al. 2005

Journal of Environmental Management

292

144

View full text Add to dashboard Cite

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“…Helsel et al (1979) [6], followed by Geiger (1984) [7] and Sansalone and Buchberger (1997) [8], proposed to simply define the first flush as when the mass/volume M(V) curve is above the bisector (45° diagonal), meaning that the fraction of pollutant load in the first part of the storm is greater than the corresponding fraction of runoff volume. Saget et al (1996) [9] define the first flush to be significant when at least 80% of the load is transferred in the first 30% of the storm, represented by Zone 1 of the M(V) curve. Bertrand-Krajewski et al (1998) [10] admits that the selection of the 30/80 criterion is useful to quantify precisely the first flush phenomenon, but it is arbitrary; they believe that it is possible to choose other pairs of values to define first flushes.…”

Section: Introductionmentioning

confidence: 99%

Build-Up/Wash-Off Monitoring and Assessment for Sustainable Management of First Flush in an Urban Area

et al. 2015

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Abstract:The characterization of stormwater runoff on urbanized surfaces by means of comparison between experimental data and simulations is a strict requirement for a sustainable management of urban sewer systems. A monitoring campaign was carried out within a residential area in Puglia (Southern Italy) in order to collect and evaluate quantity and quality data. A strong correlation was observed between COD (Chemical Oxygen Demand) and TSS (Total Suspended Solid) concentrations, whose values exceed water quality standards. TSS was used for calibration of Storm Water Management Model (SWMM) which was then validated with reference to the pollutograph's shape and the peak-time. The first flush phenomenon occurrence was also investigated by looking at the distribution of pollutant mass vs. volume in stormwater discharges, using the so-called "M(V) curves". Results show that on average the first 30% of that washed off carries 60% of TSS and provides important information for the design of efficient systems for first flush treatment.

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“…Wash off may be a function of rainfall intensity and other factors (Kim et al 2005(Kim et al , 2006. Few researchers determined the effect of the antecedent dry period in their study of stormwater discharge (Saget et al 1996;Lee et al 2002). (Ball et al 1998) tried to find a buildup model using regressions of ADD.…”

Section: Stormwater Quality Assessment Through Modelingmentioning

confidence: 99%

Conceptualizing a decentralized stormwater treatment system for an urbanized city with improper stormwater drainage facilities

Arora

Reddy

2014

Int. J. Environ. Sci. Technol.

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Urbanization involving replacement of previous areas with impervious surfaces and drainage channel modifications results in increased runoff volume leading to flooding and also in deteriorating the quality of the stormwater runoff. An effective and efficient stormwater management is needed in the urban areas for mitigating the impacts and overcoming the problems associated with the urban stormwater. An attempt has been made in the present study to investigate the relationships between stormwater quality and five different land uses for the Patiala city of Punjab State. Stormwater samples collected from these locations, between April 2010 and March 2011, were analyzed for various organic and inorganic water quality parameters and heavy metals. Inter-parameter relationships studied provided vital information in deciding upon the treatment units most likely to be suitable for that particular sub-watershed. Multiple regression modeling helped in assessment of water quality parameters and predicting the quality well before actually analyzing the parameters and thus aided in developing treatment schemes suitable for taking care of the stormwater quality even under worst set of conditions. The outcomes of the research study effectively contributed toward conceptualizing a decentralized stormwater treatment system that would be capable of coping with the stormwater runoff-associated problems faced by the city and can serve as a model for other underdeveloped and developing cities having improper stormwater management facilities.

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The first flush in sewer systems

Cited by 83 publications

References 0 publications

Understanding the role of land use in urban stormwater quality management

Understanding the role of land use in urban stormwater quality management

Build-Up/Wash-Off Monitoring and Assessment for Sustainable Management of First Flush in an Urban Area

Conceptualizing a decentralized stormwater treatment system for an urbanized city with improper stormwater drainage facilities

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