Table 5.8 Modelling Results at Sensitive Receivers
Parameters |
Predicted Concentration1 |
|||||
Wet Season Without Stratification |
Wet Season With Stratification |
Dry Season |
||||
0.1 m/s |
0.5 m/s |
0.1 m/s |
0.5 m/s |
0.05 m/s |
0.5 m/s |
|
At Gazetted FCZ |
||||||
BOD (mg/L) |
1 |
1 |
1 |
1 |
1 |
1 |
SS (mg/L) |
12 |
12 |
12 |
12 |
8 |
8 |
TKN (mg/L) |
0.278 |
0.257 |
0.333 |
0.268 |
0.333 |
0.297 |
TIN (mg/L) |
0.09 |
0.08 |
0.11 |
0.09 |
0.24 |
0.23 |
NH3-N (mg/L) |
0.054 |
0.043 |
0.081 |
0.049 |
0.120 |
0.101 |
Unionised Ammonia2 (mg/L) |
0.003 |
0.002 |
0.004 |
0.002 |
0.006 |
0.005 |
E. coli (counts per 100 mL) |
23 |
22 |
25 |
23 |
87 |
85 |
At Secondary Contact Recreation Subzone at Mo Tat Wan |
||||||
BOD (mg/L) |
1 |
1 |
1 |
1 |
1 |
1 |
SS (mg/L) |
12 |
12 |
12 |
12 |
8 |
8 |
TKN (mg/L) |
0.275 |
0.256 |
0.317 |
0.263 |
0.330 |
0.296 |
TIN (mg/L) |
0.09 |
0.08 |
0.10 |
0.09 |
0.24 |
0.23 |
NH3-N (mg/L) |
0.052 |
0.043 |
0.073 |
0.046 |
0.118 |
0.101 |
Unionised Ammonia2 (mg/L) |
0.002 |
0.002 |
0.003 |
0.002 |
0.006 |
0.005 |
E. coli (counts per 100 mL) |
23 |
22 |
25 |
22 |
87 |
85 |
Note:
1 Background level were included.
2 Unionised ammonia concentration was calculated based on 4.7% of unionised ammonia constituting the total ammonia concentration at 22.4oC, pH 8.1, and salinity of 31.7ppt.