Port Hedland South-West Creek Dredge Plume Modelling Final Report Version 4 Prepared for Port Hedland Port Authority

Port Hedland South-West Creek Dredge Plume Modelling Final Report Version 4 Prepared for Port Hedland Port Authority 12 References AME (2010). PHPA South West Creek Approvals Initial Plume Modelling Input. File Note, 13 July 2010. Berthot A. and Treloar P. D. (2009). The Use of Numerical Modeling in Assisting Port Development Case Study at Port Hedland. Proceedings of Coast and Ports 2009. Wellington, NZ. September 2009. Bridges T.S., Ells S., Hayes D, Mount D, Nadeau S.C., Palermo M.R., Patmont C., and Schroeder P.UASCE (2008). The Four Rs of Environmental Dredging:Resuspension, Release, Residual, and Risk. Published by USACE, Dredging Operations and Environmental Research Program, ERDC/EL TR-08-4. Cardno Lawson Treloar (2010). Port Hedland Harbour Current Modelling Investigations for Proposed Development at Lumsden Point. Prepared for Port Hedland Port Authority. Ref: LJ2843, L2043. 29 March 2010. Global Environmental Modelling Systems (GEMS) 2008. RGP5 Port Facilities Dredging Program Simulation Studies at Harriet Point. Report July 2008. Port of Melbourne Corporation (2008). Turbidity Detailed Design (Channel Deepening Project). CDP_ENV_MD_024 Rev 2. January 2008. Postma, L., Stelling, G.S. and Boon, J., (1999). Three-dimensional water quality and hydrodynamic modelling in Hong Kong. Stratification and water quality. Proceedings of the 2nd Int. Symp. on Environmental Hydraulics, Hong Kong, Balkema, Rotterdam. December 1998, 43-49. Provis D. and Aijaz S. (2009). Prediction of Plume Generation and Movement from Dredging Operations in Port Phillip Bay, Melbourne. Proceedings of Coast and Ports 2009. Wellington NZ, September 2010. SKM (2008). Dredging Verification Studies at Cape Lambert. Presentation prepared by SKM. March 2008. SKM (2010). Port Hedland Port Authority South West Creek Dredging - Geotechnical Interpretative Report. Prepared by SKM, Rev 0 October 2010. van Rijn, L. (1993): Principles of Sediment Transport in Rivers, Estuaries and Coastal Seas. AQUA Publications. van Rijn, L. (2006): Principles of Sediment Transport in Rivers, Estuaries and Coastal Seas Part II. AQUA Publications. Wolanski E., Jones M., and Bun J.S. (1980). Hydrodynamics of a Tidal Creek-Mangrove Swamp System. Australian Journal of Marine and Freshwater Research. Volume 31, pp431-450. Worley Parsons (2009). The Heng Shan Project - South West Creek Berths 1 and 2 (SWC1 and SWC2) Geotechnical Investigation. Prepared for FORTESCUE METALS GROUP LIMITED. Ref: 00093-P-12044-RP-GE-0003. 4 November 2010 Cardno (NSW/ACT) Pty Ltd 35 Z:\Doc_CLT\2010\Reports.2010\Rep1017pv4.doc

Figure 1.1 Figure 3.1 Figure 3.2 Figure 4.1 Locality Plan Offshore Tide Gauge, Current meter and ADCP Locations Seabed Mounted ADCP Locations Model Grid Setup Figure 4.2 Model Grip Setup (Inner Harbour) Figure 4.3 Comparison Measured and Modelled Water Level Figure 4.4 Comparison Measured and Modelled Current (Cm3) Figure 4.5 Comparison Modelled and Measured Discharge ADCP Transects Figure 4.6 Comparison Modelled and Measured Current (ADCP2-2007) Figure 4.7 Comparison Modelled and Measured Current (ADCP 1-2009) Figure 4.8 Comparison Modelled and Measured Current (ADCP 3-2009) Figure 5.1 Output Points Map Figure 5.2 Dredging Locations Figure 6.1 Water Level, Current Speed and Direction Time Series-Spring Figure 6.2 Water Level, Current Speed and Direction Time Series Neap Figure 6.3 Tracer Concentration After 48-hours Figure 6.4 Tracer Concentration Time Series 8 Days Figure 6.5 E-folding Time Figure 7.1 TSS Average Concentration Contours - Surface Layer Figure 7.2 TSS Average Concentration Contours - Bottom Layer Figure 7.3 TSS Concentration Contours Exceeded 5% of the time - Surface Layer Figure 7.4 TSS Concentration Contours Exceeded 5% of the time - Bottom Layer Figure 7.5 Concentration Time Series - Bottom Layer Figure 7.6 Light Intensity Time Series Figure 7.7 Sediment Deposition (mass) Contours Figure 7.8 Cumulative Sediment Deposition Contours Figure 7.9 60mm Cumulative Sediment Deposition Contour DMMA Option 1 Figures 4 November 2010 Cardno (NSW/ACT) Pty Ltd A1 Z:\Doc_CLT\2010\Reports.2010\Rep1017pv4.Doc

Figure 7.10 Offshore TSS Concentration Contours Exceeded 5 % of the Time DMMA Option 1 Surface Layer Figure 7.11 Offshore TSS Concentration Contours Exceeded 5 % of the Time - DMMA Option 1 Bottom Layer Figure 8.1 TSS Average Concentration Contours DMMA Option 2- Surface Layer Figure 8.2 TSS Average Concentration Contours DMMA Option 2- Bottom Layer Figure 8.3 TSS Concentration Contours Exceeded 5% of the time DMMA Option 2 - Surface Layer Figure 8.4 TSS Concentration Contours Exceeded 5% of the time DMMA Option 2 - Bottom Layer Figure 8.5 Concentration Time Series DMMA Option 2- Bottom Layer Figure 8.6 Light Intensity Time Series DMMA Option 2 Figure 8.7 Sediment Deposition (mass) Contours DMMA Option 2 Figure 8.8 Cumulative Sediment Deposition Contours DMMA Option 2 Figure 8.9 60mm Cumulative Sediment Deposition Contour DMMA Option 2 Figure 8.10 Offshore TSS Concentration Contours Exceeded 5 % of the Time DMMA Option 2 Surface Layer Figure 8.11 Offshore TSS Concentration Contours Exceeded 5 % of the Time DMMA Option 2 Bottom Layer Figure 9.1 Sensitivity Case BC Bathymetry Figure 9.2 Sensitivity Cases - TSS Average Concentration Contours - Surface Layer Figure 9.3 Sensitivity Cases - TSS Average Concentration Contours - Bottom Layer Figure 9.4 Sensitivity Cases - TSS Concentration Contours Exceeded 5% of the time - Surface Layer Figure 9.5 Sensitivity Cases - TSS Concentration Contours Exceeded 5% of the time - Bottom Layer Figure 9.6 Sensitivity Cases - Concentration Time Series - Bottom Layer Figure 9.7 Sensitivity Cases - Light Intensity Time Series Figure 9.8 Sensitivity Cases - Sediment Deposition (mass) Contours Figure 10.1 Water Depth Map Figure 10.2 Water Level Time Series Existing and Developed Cases Comparison Figure 10.3 Bed Shear Stress Map Erosion/Sedimentation Patterns Figures 4 November 2010 Cardno (NSW/ACT) Pty Ltd A2 Z:\Doc_CLT\2010\Reports.2010\Rep1017pv4.Doc

LJ15011 October 2010 Locality Map Port Hedland Figure 1.1

ADCP0 ADCP1 T2 T3 T4 T1 T5 ADCP2 T6 T9 T7 T8 WNI data March-April 1998: - Tidal Gauges TG1 and TG2 - Current meter CM1 and CM May-June 1998: - ADCP (ADCP 0 moored) CLT data March-April 2007: - ADCP Transects (T1-T4,T6) - ADCP (ADCP 1 moored) October-November 2007: - ADCP Transects (T4-T9) - ADCP ( ADCP moored) 2 LJ15011/Rep1017p September 2010 File: J:\CM\LJ15011-PH-SWCreek-DredgePlume\Figures\Final\Figures_3-1to4-7.cdr Port Hedland South-West Creek Dredge Plume Modelling Investigations STUDY AREA OFFSHORE TIDE GAUGE, CURRENTMETER AND ADCP LOCATIONs Figure 3.1

3 LJ15011/Rep1017p September 2010 File: J:\CM\LJ15011-PH-SWCreek-DredgePlume\Figures\Final\Figures_3-1to4-7.cdr Port Hedland South-West Creek Dredge Plume Modelling Investigations SEABED MOUNTED ADCP LOCATIONS 2007 and 2009 Figure 3.2

Port Hedland South-West Creek Dredge Plume Modelling Investigations MODEL GRID SETUP LJ15011/Rep1017p September 2010 File: J:\CM\LJ15011-PH-SWCreek-DredgePlume\Figures\Final\Figures_3-1to4-7.cdr Figure 4.1

LJ15011/Rep1017p September 2010 File: J:\CM\LJ15011-PH-SWCreek-DredgePlume\Figures\Final\Figures_3-1to4-7.cdr Port Hedland South-West Creek Dredge Plume Modelling Investigations MODEL GRID SETUP Inner Harbour Figure 4.2

* Measured data - Model data T1 T4 T5 T6 LJ15011/Rep1017p September 2010 File: J:\CM\LJ15011-PH-SWCreek-DredgePlume\Figures\Final\Figures_3-1to4-7.cdr Port Hedland South-West Creek Dredge Plume Modelling Investigations COMPARISON MODELLED AND MEASURED DISCHARGE ADCP TRANSECTS Figure 4.5

Case A Output Points Map Figure 5 1 A

Case B Output Points Map Figure 5 1 B

Case C Output Points Map Figure 5 1 C

Case D Output Points Map Figure 5 1 D

Case E Output Points Map Figure 5 1 E

Case F Output Points Map Figure 5 1 F

Case G Output Points Map Figure 5 1 G

Existing Case Output Points Map Figure 5 1 X

Case A Dredging Locations Figure 5 2 A

Case B Dredging Locations Figure 5 2 B

Case C Dredging Locations Figure 5 2 C

Case D Dredging Locations Figure 5 2 D

Case E Dredging Locations Figure 5 2 E

Case F Dredging Locations Figure 5 2 F

Case G Dredging Locations Figure 5 2 G

Water Level, Current Speed and Direction Time Series Spring Location Point: 1 Figure 6 1 1

Water Level, Current Speed and Direction Time Series Spring Location Point: 2 Figure 6 1 2

Water Level, Current Speed and Direction Time Series Spring Location Point: 3 Figure 6 1 3

Water Level, Current Speed and Direction Time Series Spring Location Point: 4 Figure 6 1 4

Water Level, Current Speed and Direction Time Series Spring Location Point: 5 Figure 6 1 5

Water Level, Current Speed and Direction Time Series Spring Location Point: SWC1 Figure 6 1 SWC1

Water Level, Current Speed and Direction Time Series Spring Location Point: SWC3 Figure 6 1 SWC3

Water Level, Current Speed and Direction Time Series Neap Location Point: 1 Figure 6 2 1

Water Level, Current Speed and Direction Time Series Neap Location Point: 2 Figure 6 2 2

Water Level, Current Speed and Direction Time Series Neap Location Point: 3 Figure 6 2 3

Water Level, Current Speed and Direction Time Series Neap Location Point: 4 Figure 6 2 4

Water Level, Current Speed and Direction Time Series Neap Location Point: 5 Figure 6 2 5

Water Level, Current Speed and Direction Time Series Neap Location Point: SWC1 Figure 6 2 SWC1

Water Level, Current Speed and Direction Time Series Neap Location Point: SWC3 Figure 6 2 SWC3

J:\CM\LJ15011 PH SWCreek Dredge Plume\FlushMaps\ Port Hedland South West Creek Dredge Plume Modelling Tracer Concentration After 48h Case A Figure 6 3 A

J:\CM\LJ15011 PH SWCreek Dredge Plume\FlushMaps\ Port Hedland South West Creek Dredge Plume Modelling Tracer Concentration After 48h Case B Figure 6 3 B

J:\CM\LJ15011 PH SWCreek Dredge Plume\FlushMaps\ Port Hedland South West Creek Dredge Plume Modelling Tracer Concentration After 48h Case C Figure 6 3 C

J:\CM\LJ15011 PH SWCreek Dredge Plume\FlushMaps\ Port Hedland South West Creek Dredge Plume Modelling Tracer Concentration After 48h Case D Figure 6 3 D

J:\CM\LJ15011 PH SWCreek Dredge Plume\FlushMaps\ Port Hedland South West Creek Dredge Plume Modelling Tracer Concentration After 48h Case E Figure 6 3 E

J:\CM\LJ15011 PH SWCreek Dredge Plume\FlushMaps\ Port Hedland South West Creek Dredge Plume Modelling Tracer Concentration After 48h Case F Figure 6 3 F

J:\CM\LJ15011 PH SWCreek Dredge Plume\FlushMaps\ Port Hedland South West Creek Dredge Plume Modelling Tracer Concentration After 48h Case G Figure 6 3 G

J:\CM\LJ15011 PH SWCreek Dredge Plume\FlushMaps\ Port Hedland South West Creek Dredge Plume Modelling Tracer Concentration After 48h Existing Case Figure 6 3 X

J:\CM\LJ15011 PH SWCreek DredgeFlush\FlushMaps\ Port Hedland South West Creek Dredge Plume Modelling Tracer Concentration Time Series 8 Days Location:F1 Figure 6 4 F1

J:\CM\LJ15011 PH SWCreek DredgeFlush\FlushMaps\ Port Hedland South West Creek Dredge Plume Modelling Tracer Concentration Time Series 8 Days Location:F2 Figure 6 4 F2

J:\CM\LJ15011 PH SWCreek DredgeFlush\FlushMaps\ Port Hedland South West Creek Dredge Plume Modelling Tracer Concentration Time Series 8 Days Location:F3 Figure 6 4 F3