water pollution study

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Algorithms II

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2. Stratified model

This model is official in Spain and it follows Orden del 13 de Julio de 1993 del Ministerio de Obras Públicas y Transportes del Reino de España, B.O.E. Martes 27 de Julio de 1993, página 22861, I. Disposiciones generales. Proyecto de conducciones de vertidos desde tierra al mar.

The stratification phenomena is the existence of two homogeneous water layers and separated by a thin thermocline layer. In such a case, we can say that the water is stratified. There is no exchange of pollutants through this picnocline layer. In case we suppose that a picnocline layer exists, we will be able to check the stability by means of the application of the following equation:

[u₀² B+ U_a² H]/[(u₀ B g’)^2/3 H] <0.54

u₀=effluent velocity (m/s)

H=water depth at discharge position (m)

g’=reduced gravity acceleration (m/s²), g’=g(ρ_a- ρ₀)/ ρ₀

g=9,81m/s^2 (gravity acceleration)

ρ_a=water density (Kg/m³)

ρ₀=effluent density (Kg/m³)

Typical values (pollutants):

Organic matter as DBO5 - 350g/m3

Suspended matter - 600g/m3

E. Coli - 10¹² /m3

N2 (total) - 30 gN/m3

Effluent velocity - entre 0.6 y 0.8 m/s

Port diameter - 6cm

Dispersion coefficients:

Horizontal dispersion: K_y(m²/s)=3x10^-5 B^4/3.

B=initial plume width(m)

Vertical dispersion: K_z(m²/s)=4x10^-3 U_a e

e= thickness of the mixing layer

U_a=horizontal ambient velocity (m/s)

ALGORITHMS: Algorithms I - Algorithms II - Algorithms III - Algorithms IV - Algorithms V - Algorithms VI

Canarina Algoritmos Numéricos, S.L.

Environmental software solutions

Software para contaminación del medio ambiente

Canary Islands, Spain

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DESCAR: DESCAR: water pollution - Data I - Algorithms I - Pollutants I

SOLUTIONS: DESCAR: water pollution - Advantages - Price

INPUT DATA: Data I - Data II - Data III - Import - Commands - Graphs I - Graphs II

ALGORITHMS: Algorithms I - Algorithms II - Algorithms III - Algorithms IV - Algorithms V - Algorithms VI

POLLUTANTS: Pollutants I - Pollutants II - The sea I - The sea II - Pycnocline

DESCAR software solutions: This application has been used in great number of environmental reports, courses and water pollution studies in the last years. We currently have users in more than 10 countries.

Ripon - water pollution experts - environmental problems - environmental ecology - water pollution study

Salford - environmental sustainability - environmental ecosystem - environmental development - water pollution study

Portsmouth - environmental projects - environmental agriculture - population experts - water pollution study

Preston - oil experts - environmental biodiversity - urban experts - lake water pollution

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Cumbria - environmental science & technology - environmental science and engineering - water pollution study

Suffolk - global environmental management - environmental management solutions - environment resource management -

Hampshire - environment management - global environmental management initiative - integrated environmental assessment and management -

North Yorkshire - environmental management department - general environmental management -

Norfolk - environment protection - environment sciences - environmental management - sustainable science - pollution experiments - environmental impact -

Cornualles - introduction to environmental science - environmental science study - lake water pollution

Wiltshire - environmental pollution science - human environmental sciences -

Armagh - best practice environmental management - water and environmental management - environmental economics and management -

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Aberdeen - environmental management association - environmental data management - environmental resource management -

Bath - environmental management institute - environmental management policy - management of environment - environmental management -

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Bristol -urban environmental management - environment management act - environmental management plans -

Birmingham - environmental earth sciences - environmental science chemistry -environmental science studies -

Bradford - environmental biology - environmental physics - environmental protection - lake water pollution

Cambridge - environmental experiments - environmental health - science pollution - ecological sciences -

Nottingham - centre for environmental management - environment management systems - environmental management strategy -

Plymouth - environmental land management - environment waste management - environmental management practices -

Portsmouth - environmental science labs - environmental science research - environmental science project -

Oxford - science ecology - enviro science - ecological science - lake water pollution

Peterborough - resource and environmental management - environmental management authority - environment management and protection -

Devon - environmental science associates - academy of environmental science - environmental science and forestry -

Lincolnshire - environmental science and pollution research -

St Albans - air pollution map - light pollution maps - water pollution map -

St David's - map of pollution - map of air pollution - pollution map uk -

North Yorkshire - maps of air pollution - pollution map London - maps of water pollution -

Hampshire - environmental planning & management - environmental affairs and development planning -

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Stirling - water pollution maps - noise pollution map - map of water pollution

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Wells - map on pollution - river pollution map - environmental planning -

Westminster - environmental planning collaborative - environmental land use planning and management - environmental planning and development -

Truro - global air pollution map - world air pollution map - ocean pollution map

Wakefield - pollution concept map - pollution maps uk -

pollution map of the world -

Worcester - department of environmental planning - environmental planning & assessment - environmental land use planning -

York - strategic environmental planning - centre for environment planning and technology -

Winchester - department of environmental affairs and development planning - center for environmental planning and technology -

centre for environmental planning and technology

Wolverhampton - national environmental planning agency -

water in environmental planning - environmental sustainability -

Devon - pollution maps -

Lincolnshire - environmental engineers - sustainable development - urban and regional planning -

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