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RFI - Attachment F - Engineering Report
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Phospohorus Loads Sub 1200 Micron
140000
Comm
120000 Total P
(mg)
TP Load (mg)
100000
80000 Urban
Total P
60000 (mg)
40000 Base
20000 Total P
(mg)
0
June Augest October December Total
Months
Figure 16: Monthly Phosphorous Loads
Nitrogen
Table 6 shows high nitrogen concentrations in October in nitrogen in large particles.
This is related to the high organic content during these months
The sources of nitrogen are generally plant material and animal faeces. Kinglet Mitchell
found higher concentrations of nitrogen in coarse stormwater particles, the same was
found in the Blackbutt catchment, which was mostly likely related to leaf material
collected in the filter bags.
Figure 17, shows nitrogen concentrations in the Blackbutt creek catchment tend to be
related to the organic content of the sediment.
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