DESCAR Software: eutrophication · environmental science and engineering

CANARINA:

DESCAR:

Advantages

Price

INPUT DATA:

ALGORITHMS:

POLLUTANTS:

Canarina Spain · Canarina software

Algorithms V

Home - DEMO Download - Order and price

2.3 Near mixing zone and distant mixing zone

We need to know the place where the plume centerline crosses the water surface or picnocline layer. To calculate this point we will use U_a and the vertical velocity

Multiport diffuser.- W=1,66(g’q)^1/3 being W the vertical velocity of the effluent (m/s).

Separated ports.- W=6,3(g’Q_b/H)^1/3 .

Single port.- W=6,3(g’Q/H)^1/3.

In the last two cases, H will be replaced by ymax when the water is stratified. The point localization with regard to the place where the plume centerline crosses the surface, gives us the near and distant mixing zone definitions.

2.4 Concentration calculation

The concentration value in a plume point is determined by the X,Y,Z coordinates and is given by the equation:

C(X,Y,Z)=(C₀/S) F₀(t)F₁(t)F₂(Y,t)F₃(Z,t)

C₀=pollutant concentration in the effluent

S=initial dilution

being t=X/U_a. F₀(t) takes into account non-conservative pollutants and is equal to:

F₀(t)=10^-t/T90

The F₀, F₁, F₂ and F₃ functions depend on being in near or distant mixing zone.

(a) Near mixing zone:

In such a case, the equations are

F₁(t)=1

F₂(Y,t)=(1/2)[erf[(B/2+Y)/(σ_y2^1/2)]+ erf[(B/2-Y)/(σ_y2^1/2)]]

F₃(Z,t)=(1/2)[erf[(e+Z)/(σ_z2^1/2)]+ erf[(e-Z)/(σ_z2^1/2)]]

being σ_y=(2K_yt)^1/2 and σ_z=(2K_zt)^1/2. The program calculats erf function by numerical integration. The the precision of integration method depends on the parameter N_int. Increasing N_int value, we increase the numeric convergence but we will need more time of calculation. We should look for an optimized value of N_int.

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

Canarina Algoritmos Numéricos, S.L.

Environmental software solutions

Software para impacto del medio ambiente

Canary Islands, Spain

e-mail: contact us

European network on pollution · European Union

Member of MAPO: European network on Marine Pollution. Project

funded by the European Commission through the

6th Framework Programme for Research and Development

eutrophication

CANARINA: Home - Air pollution · DISPER - Noise pollution · CUSTIC - Water pollution · DESCAR - Contact us

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 -

Salford - environmental sustainability - environmental ecosystem - environmental development -

Portsmouth - environmental projects - environmental agriculture - population experts -

Preston - oil experts - environmental biodiversity - urban experts -

North Yorkshire - impact environmental - environmental issues -

Cumbria - environmental science & technology - environmental science and engineering -

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 -

Wiltshire - environmental pollution science - human environmental sciences -

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

Bangor - environmental science policy - environmental health sciences -earth and environmental sciences -

Derbyshire - environmental science program - masters in environmental science -

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

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

Belfast - environmental management programme - environmental management framework - sustainable environmental management -

Brighton & Hove - national environment management authority - environmental management software - environmental management agency -

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 -

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 -

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 -

Sunderland - regional environmental planning - community and environmental planning - environmental management planning -

Swansea - environmental planning handbook - environmental management and planning - environmental planning instruments -

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

Stoke-on-Trent - environmental planning specialists -

local environmental planning - integrated environmental planning -

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 -

Copyright © 2005 Canarina Algoritmos Numéricos, Sociedad Limitada Unipersonal CIF-B38803110 registered for electronic commerce in sheet TF-35526, sheet 1 of the volume 2.671 of the General Section, First Registration, Registro de la Propiedad Número 2 y Marcantil of , Spain. All rights reserved.