CANARINA:
DESCAR:
INPUT DATA:
ALGORITHMS:
POLLUTANTS:
Algorithms III · software · marine pollution monitoring
2.1 Water is stratified
2.1.1 Multiport diffuser.- We have three different cases:
Case I:
θ >=65º F<=0.1 ó
θ <65º F<=0.36
θ=angle between Ua vector and diffuser.
F=Fraude number F=Ua3 (g’q)-1
q=Unitary flor rate in the diffuser q=QLt-1 (m2/s)
Q=Discharge flow rate (m3/s)
Lt=Diffuser length (m)
S=initial dilution
In such a case, we have the next relationships
S=0.27 Ua H q-1 F-1/3
e=0.29H
B=SQ/eUa
Case II:
25o=<θ <65º F>0,36 (*)
In such a case, we have the next relationships
S=0.38 Ua H q-1
B=max[Ltsin θ; 0.93Lt F-1/3]
e=SQ/BUa
Case III:
θ <25º 0,36<F=<20
In such a case, we have the next relationships
S=0.294 Ua H q-1 F-1/4
B=max[Ltsin θ; 0.93Lt F-1/3]
e=SQ/BUa
Case IV:
θ <25º F>20
In such a case, we have the next relationships
S=0.139 Ua H q-1
B=max[Ltsin θ; 0.93Lt F-1/3]
e=SQ/BUa
Case V:
θ >65º F>0,1
In such a case, we have the next relationships
S=0.58 Ua H q-1
B=max[Ltsin θ; 0,93Lt F-1/3]
e=SQ/BUa
From Case II to Case V, and if e>H, we take e=H and S= UaBH/Q.
2.1.2 Separated ports.- We will solve this case by means of a iterative mathematical method
B=max[Ltsin θ; 0,93Lt F-1/3]
S=0.089 g’1/3 (H-e)5/3 Qb-2/3
e=SQ/BUa
Qb= flow rate at each single port(m3/s).
The number of iterations can modify by means of the parameter N_it of the function Calculation parameters of the program.
Increasing N_it value, we increase the numeric convergence but we will need more time of calculation. We should look for an optimized value of N_it.
Single port.- In such a case, we have the next relationships
e=0.15H
S=0.089 g’1/3 (H-e)5/3 Q-2/3
B=SQ/eUa (*)
However, at high velocity values and if B<=0.3H, the approximation is not correct .
software · marine pollution monitoring
DESCAR software: water discharge system mixing zone model waste water discharge standards wastewater treatment chemical contamination of water wastewater simulation water analysis sewage treatment effluent effluent and environment sewage discharge modeling environment management and protection environmental impact evaluation environmental science · engineering environmental audit reports marine pollution monitoring sewage treatment discharge marine pollution pollution and water environmental sewage water pollution control oil environmental impact GIS · environment