BHP – Stormwater run-off models, Pilbara, W.A. utilising GIS

BHP – Stormwater run-off models, Pilbara, W.A. utilising GIS

BHP BILLITON IRON ORE PTY LTD
Nelson Point & Finucane Island, Pilbara Coast, Western Australia

THIS IS AN HISTORICAL PROJECT

A stormwater run-off model was developed for the Nelson Point iron ore handling & port facilities, to model sediment and potential contaminant loadings from the site into the Port Hedland harbour area.

Drainage catchments identified by BHPB were overlain by site geology and cut/fill plans to allow run-off coefficients to be allocated, using Geographical Information System (GIS) software.

Evaporative loss was modelled based on published pan Et figures occurring during the storm duration.

Intensity-frequency-duration (IFD) run-off events were also modelled.

The model was calibrated against observed flow data recorded during historic storm events.

A similar run-off model was also developed for the Finucane Island ore handling facility.
Run-off catchments were defined from high-resolution aerial photography and a 0.5m digital elevation model. Catchments & discharge points were verified by ground -truthing.

Sediment and contaminant loadings from individual catchments flowing to specific discharge points can be estimated from current and historic rainfall/ intensity events.

Stuart Jeffries
Hydrosolutions Pty Ltd

Click here to see a project summary
Click here for details of our capabilities in GIS
Click here to send us details of your requirements
Click here for other example GIS projects

Stuart Jeffries
Hydrosolutions Pty Ltd

GIS3

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