Darwin Harbour bathymetric survey

Client: Northern Territory Government

Cross sections of 20 Darwin Harbour channels

Rise was engaged to survey 20 Darwin Harbour channels to provide NTG with full cross-sectional profiles of each channel.

A key consideration for this project was the unique Darwin Harbour environment:

- Macro-tidal system with extreme tidal range (up to 8m from high to low tide).

- Fast currents and mangrove-lined creek banks.

To mitigate these issues Rise surveyed using both a bathymetric USV and 5.3m Rib. Rise developed a hybrid approach combining high solutions with multi-beam sonar and land-based mobile LiDAR, removing need to apply for CASA and RAAF approvals for aerial UAV works.

The final output was 20 georeferenced channel profiles, delivered within 3 weeks from final approval, including:

- LAS point clouds

- DXF, SHP and KMZ formats.

- Water level vs cross sections area tables.

- Summary reports.

Thessally Resources are undertaking exploration drilling and bulk testing within the existing Huandot Pit, located approximately 85km south of Darwin.

The existing Huandot Pit contains surface water and groundwater inflows and had been sedentary.

Rise was engaged to undertake a bathymetric survey of the test pit surface water to provide Thessally with comprehensive water volume and sedimentation modelling.

Rise used dual frequency analysis to measure both the sediment and rock bed depths to provide a comparative analysis of sediment depth variations.

The analysis used dual frequency bathmetric survey data, XYZ coordinate date and water surface level measurement using a USV (unmanned surface vehicle).

Deliverables:

-Water volume report

-Sediment report

-Interactive visual model.

Thessally Resources are undertaking exploration drilling and bulk testing within the existing Huandot Pit, located approximately 85km south of Darwin.

The existing Huandot Pit contains surface water and groundwater inflows and had been sedentary.

Rise was engaged to undertake a bathymetric survey of the test pit surface water to provide Thessally with comprehensive water volume and sedimentation modelling.

Rise used dual frequency analysis to measure both the sediment and rock bed depths to provide a comparative analysis of sediment depth variations.

The analysis used dual frequency bathmetric survey data, XYZ coordinate date and water surface level measurement using a USV (unmanned surface vehicle).

Deliverables:

-Water volume report

-Sediment report

-Interactive visual model.

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