Modeling Dispersion of Brine Discharges from Multiple Desalination Outfalls

Purnama, Anton

doi:10.1007/978-3-319-51856-5_19

Cited by 2 publications

(4 citation statements)

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“…represents the effluent plume elongation in the x-direction [3], [9], [14], [15]. Contours of concentration (2) for a point source at 12   were plotted in Fig.…”

Section: A Semi-infinite Flat Seabedmentioning

confidence: 99%

“…A regulatory mixing zone (RMZ) is an allocated impact zone in the receiving waters around the outfall beyond which the imposed water quality criteria must be met [4], [5], [7]- [9]. Conventionally, this standard regulatory guidelines consists of a concentration limit * C and a point of compliance expressed as a distance * R from the outfall's discharge port.…”

Section: Introductionmentioning

confidence: 99%

“…Due to a unique nature and local conditions of the receiving water, no unified method can be used to establish a mixing zone, and each discharge should be analyzed separately on a case-by-case basis. Thus, no specific mathematical models are recommended to assess the dilution and dispersion capacities of the receiving waters, and in searching for baseline quality standards for sophisticated, computational (full) three-dimensional hydrodynamic and water quality models, the analytical solutions of simple far-field models are presented to perform preliminary worst-case assessments [7]- [9], [11].…”

Section: Introductionmentioning

confidence: 99%

“…However, it seems impractical to impose the concentration limit value obtained at the shoreline to the operators of marine outfall systems. The difficulties in adopting a mixing zone concept are mainly related to setting up the concentration limit * C to be met at the circular mixing zone boundary of radius * R [5], [8], [9], [11]. We proposed to use the location of the maximum value of concentration at the shoreline to set up the radius (from the point source) of the RMZ and then use it to formulate the concentration limit.…”

Section: Introductionmentioning

confidence: 99%

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Mathematical Models for Calculation of Mixing Zones for Coastal Effluent Discharges

Purnama¹,

Al-Maamari²,

Balakrishnan³

2019

IJEAT

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The potential long-term environmental impacts of coastal effluent discharges can be addressed and regulated using a mixing zone concept to control and manage the mixing capacity of the receiving coastal waters. The standard regulatory guidelines consist of two key elements: a concentration limit and a point of compliance expressed as a radius centered at the end of the outfall pipe. Modeling studies of the effect of seabed depth upon dispersion of coastal effluent discharges into the sea in the far-field are investigated analytically using the solutions of two-dimensional advection-diffusion equations with a point source on the simple depth profiles of a flat seabed and a uniformly sloping seabed. Solutions are then illustrated graphically by plotting contours of concentration, showing that the effluent discharged plumes are spreading downstream and heading towards the shoreline. Based on the location of maximum value of concentration at the shoreline, the imposed radius of and limit of concentration level within the circular mixing zone are formulated to be used as a measure for assessing the impact of effluent discharges in the coastal environment. The results found agreed with the mixing zones implemented in practice as the environmental quality standards by the regulatory authorities to minimize the impact. As the sea outfall's long pipeline may go beyond the continental shelf, a sudden step change in the seabed depth profiles is introduced, where the solutions of the advection-diffusion equations are obtained using the method of images. An extended formulation of the mixing zones radius and concentration limit are also presented.

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“…represents the effluent plume elongation in the x-direction [3], [9], [14], [15]. Contours of concentration (2) for a point source at 12   were plotted in Fig.…”

Section: A Semi-infinite Flat Seabedmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations