Catchment, flood and stormwater modelling that gives engineers and planners the numbers they need for design and approval.

Where the water goes, and how much of it

Water is the variable that breaks projects after they're built. Bridges, roads, dams, drainage schemes and developments all need somebody to answer where surface water flows from, how much, and what happens in a 1-in-50-year storm.

We combine high-resolution terrain data, rainfall records and hydrological models to map drainage networks, simulate flood extents, size stormwater infrastructure and inform water-sensitive design. The output is the quantitative basis engineers need for design and approving authorities expect for sign-off.

Modelling outputs

Each model is shaped around the design or approval decision it has to support.

Catchment delineation

Watershed, sub-catchment and drainage network maps based on high-resolution DTMs.

Flood inundation maps

Modelled flood extent and depth for design return periods such as 1:10, 1:50 or 1:100 years.

Stormwater design support

Runoff calculations and sizing inputs for culverts, drains, retention basins and outfalls.

Reports and visuals

Methodology, assumptions and results documented for engineers, regulators and project owners.

How a model is built

Models are only as good as the terrain and the rainfall going in. We obsess over both.

01
Catchment review
We define the area of interest, drainage pattern and what the model has to answer.
02
Data preparation
Terrain data, soil data, land cover and rainfall records are pulled together and quality-checked.
03
Model build and run
Hydrological and hydraulic models are built, calibrated where data allows, and run for the design scenarios.
04
Reporting and design support
Results, maps and design inputs are packaged for the engineering or approval workflow.

Where it gets used

Anywhere water has to be designed for, defended against or accounted for.

Roads, bridges and drainage

Sizing culverts, bridges and stormwater systems for design storms.

Flood risk and EIA

Flood extent mapping for development sites, EIA studies and insurance.

Dams, irrigation and water

Catchment yield, reservoir studies, irrigation scheme planning and water supply.

Numbers that hold up at approval

Hydrological models get scrutinised by reviewers, lenders and regulators. We document the methodology and the assumptions so the numbers stand on their own.