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16-001014-01A (Swmp)
Attached to the e-mail Operational Works Application OPW16/0203 - 3 of 4.
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Results Comparison
Site Only (No Mitigation)
Source Residual Reduction
Flow (ML/yr) 187 187 0
Total Suspended Solids (kg/yr) 29700 29700 0
Total Phosphorus (kg/yr) 64.8 64.8 0
Total Nitrogen (kg/yr) 425 425 0
Gross Pollutants (kg/yr) 4270 4270 0
Site + External Catchments with Mitigation
Source Residual Reduction
Flow (ML/yr) 214 213 1
Total Suspended Solids (kg/yr) 36500 12700 65
Total Phosphorus (kg/yr) 77.1 33 58
Total Nitrogen (kg/yr) 480 289 40.6
Gross Pollutants (kg/yr) 4630 488 92.9
Music Modelling Results
Description TSS TP TN Gross Pollutants
(kg/yr) (kg/yr) (kg/yr) (kg/yr)
Developed Site Only (Without
Mitigation) 29700 64.8 425 4270
WQOs (Percentage Reduction) 80% 60% 45% 90%
Load Retention Target 23760 38.88 191.25 3843
Developed Site plus External Catchment
(Without Mitigation) 36500 77.1 480 4630
Developed Site plus External Catchment
(With Mitigation) 12700 33 289 488
Load Retention Achieved 23800 44.1 191 4142
Load Retention Achieved as % of
Developed Site Load 80% 68% 45% 97%
Objective Achieved? YES YES YES YES
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