CANARINA:   DESCAR: Algorithms III · software · marine pollution                                     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+ Ua2 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(ρa- ρ0)/ ρ0 g=9,81m/s^2 (gravity acceleration) ρa=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: Ky(m2/s)=3x10-5 B4/3. B=initial plume width(m)   Vertical dispersion: Kz(m2/s)=4x10-3 Ua e e= thickness of the mixing layer Ua=horizontal ambient velocity (m/s)                (air)           (noise)              (electrosmog)         marine pollution                                                                                 Canarina Environmental Software Software for environmental consulting firms Canary Islands, Spain  e-mail: contact        European Union · network on Pollution Member of MAPO: European network on Marine Pollution.                          english:           castellano:        italiano:           français:      português:     deutsch:         APLICACIONES castellano: DIS CUS DES  RAD   english: DIS CUS   RAD     deutsch: DIS CUS  DES  RAD   português: DIS CUS DES RAD     italiano:   DIS CUS  DES RAD français:  DIS CUS DES RAD