RFI - Attachment F - Engineering Report

Table of Tables
Table 1: Monthly Removal loads........................................................................................ 9
Table 2: Percentage below 1180 microns (Suspended Solids) ......................................... 14
Table 3: Percentage of above 1180 micron and below 4.75mm (bed Load) .................... 15
Table 4 Percentage above 4.75mm (Gross Pollutants) ..................................................... 15
Table 5 Organic content of samples.................................................................................. 20
Table 6 Concentrations of total nitrogen and total phosphorus (mg/kg) .......................... 21
Table 7: Loading Rates ..................................................................................................... 26
Table 8: Organic loading Rates......................................................................................... 26
Table 9: Nitrogen loading Rates ....................................................................................... 28
Table 10: Phosphorous loading Rates............................................................................... 30
Table 11 Average unit export rates (Middle Harbour Catchments) ................................. 31

Table of Figures
Figure 1: Sediment removal by the Gullypit Containing an Enviropod Filter with a 200
     micron mesh (Tonkin & Taylor)................................................................................. 7
Figure 2 : Removal loads by land Use .............................................................................. 10
Figure 3: Monthly Loads with Rainfall ............................................................................ 11
Figure 4: Monthly Rainfall against Removal Load .......................................................... 11
Figure 5: Loads vs. Peak Intensity.................................................................................... 12
Figure 6: Gross Pollutants and Peak Intensity. ................................................................. 13
Figure 7: Volume Removal Curve................................................................................... 14
Figure 8: Particle Size Distribution vs. Land Use............................................................. 15
Figure 9: Average Composition all Enviropods .............................................................. 16
Figure 10: Season Variation of Gross Pollutants.............................................................. 17
Figure 11: Season Variation of Suspended Solids............................................................ 18
Figure 12: No Seasonal variation of Bed Load................................................................. 18
Figure 13: Gross Pollutant Loading Curve (CRC 1998) .................................................. 19
Figure 14: Gross Pollutant Loading Curve for Blackbutt Creek Catchment ................... 19
Figure 15: Total Phosphorous Total Organic Load .......................................................... 22
Figure 16: Monthly Phosphorous Loads.......................................................................... 23
Figure 17: Nitrogen Loads vs. Total Organic loads......................................................... 24
Figure 18: Total Loading Monthly Removal Rates .......................................................... 25
Figure 19: land Use Loading Rates................................................................................... 25
Figure 20: Organic Loading Rates by Particle size .......................................................... 27
Figure 21: Organic Loading Rates by land use................................................................. 27
Figure 22: Nitrogen Loading Rates for particle size groups............................................. 28
Figure 23: Nitrogen loading rates by land use .................................................................. 29
Figure 24: Phosphorous Loading Rates by land use......................................................... 29
Figure 25: Phosphorous Loading Rates for particle size groups ...................................... 30




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