CANARINA:
Outfall data:
An outfall is a pollutant point source. The outfall is small if we compare it with the size of the area in which we are simulating (point source). If you click this button, the next dialog box is shown:
Depending on the used model, some data of the dialog box can be modified: Buoyant jet model or Stratified model (see calculation models).
Buoyant jet model: The necessary data in the Buoyant jet model is:
Effluent velocity ua (m/s): The average velocity of the pollutant effluent. It can be around 1 m/s.
Pollutant concentration (g/m3): The discharge concentration of the material of interest (pollutant or tracer) is defined as the excess concentration above any ambient concentration of that same material. 1g/m3=1ppm in water.
Water depth at discharge location (m): The actual water depth at the sumerged discharge location. For surface discharges it is the water depth at the channel entry location.
Discharge flow rate (m3/s): The discharge flow rate and the discharge velocity are related through the port cross-sectional area. (Flow rate)=(area)x(discharge velocity).
Discharge density (kg/m3): It is the density of the pollutant discharge.
Discharge conditions: There are three options: Vertical discharge, Horizontal discharge (A-type) and Horizontal discharge (B-type). In the vertical discharge, the discharge flow is perpendicular to the water surface. In the horizontal discharges (A and B), the discharge flow is parallel to the water surface. In the horizontal discharge case, we assume that the discharge vector is always perpendicular to current vector. That is to simplify the calculations. In the A-type, the flow vector points the South and the current vector points the East. In the B-type, the flow vector points the North and the current vector points the East.
Stratified model: The necessary data in the Stratified model is:
Pipe angle (0 to 360): It is the horizontal angle of discharge measured clockwise from the North (at the window top).
Diffusor length (m): The diffuser length is the distance from the first to the last port or nozzle.
1/T90 (1/horas): This coefficient considers the half life of the pollutant if this disappears by means of chemical reactions (non-conservative pollutant). This is the T90 for E.Coli. For towns with less than 10.000 inhabitants we can take a T90=2 hours (1/T90=0,5 hours-1) in the Mediterranean and T90=3 hours (1/T90=0,33 hours-1) in the Atlantic.
Number of openings: DESCAR allows for different types of discharge geometries. There are three options: Single port, Multiport diffuser and Separated ports. We have a multiport diffuser when the separation among the ports is less than 3% of the depth. We have Separated ports when the separation among the ports is bigger than 20% of the water depth.
Canarina Algoritmos Numéricos, S.L.
Environmental software · environmental software solutions
Canary Islands, Spain
e-mail: Contact us
European Union · network on Pollution
Member of MAPO: European network on Marine Pollution.
Project funded by the European Commission
through the 6th Framework Programme for Research and Development
DESCAR - Solutions - Advantages - Price - Data I - Data II - Average - Import - Graphs I - Graphs II - Commands - Algorithms I - Algorithms II - Algorithms III - Algorithms IV - Algorithms V - Algorithms VI - Algorithms VII - Pollutants I - Pollutants II - The sea I - The sea II - Pycnocline - Google maps - GIS
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. Water pollution reports:
Chalatenango: trichomonas and wastewater study - wastewater treatment and sewage discharges - trichomoniasis and trichomonas hominis report - standard methods for the examination of sewage discharges - sewage discharge modeling
Cojutepeque: water and wastewater study - sewage sludge and partial discharge report - sewage treatment and glow discharge study - sewage discharge modeling
Jutiana: wastewater treatment plants - water and wastewater treatment with heavy metals - wastewater engineering - sewage discharge modeling
La Union: wastewater plant - wastewater management - slaughterhouse wastewater - wastewater engineering treatment and reuse - effluent guidelines - sewage discharge modeling
San Miguel: sewage water treatment with DBO - port of discharge calculation and sewage pumps - sewage discharge modeling
San Salvador: sewage treatment plant study - standard methods for examination of water and wastewater - wastewater effluent design report - water discharge with heavy metals study - sewage discharge modeling
San Vincente: stream discharge with Cl2 study - sewage plant and wastewater minimization report - anaerobic wastewater treatment and biological wastewater study - activated sludge and anaerobic digestion report - sewage discharge modeling
Santa Ana: sludge and effluent with Pb report - sludges and wastewaters with Hg study - biotreatment in sewage report - sewage discharge modeling
Sonsonate: suspended solids and biosolids in effluents study - effluents with solid wastes and anaerobic report - heavy metals in wastewaters study - sewage discharge modeling
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