Do you work under our firm's name, or are we introduced as sub-consultants?

Either. We are used to working as a named sub-consultant on your letterhead and project documentation, or as a visible specialist input depending on how your client engagement is structured — we scope this with you up front.

Can you pick up a project mid-stream if our capacity changes?

Yes. We regularly step into hydrology or hydraulics scope partway through a project — a capacity gap, a departing team member, or a scope that has grown beyond the original brief. We ask for the existing model, survey, and correspondence so we are not re-deriving assumptions your team has already settled.

How do your deliverables integrate with our report structure?

We match your firm's coordinate system, layer naming, and report format where practical, so our hydrology and hydraulics sections slot into your document rather than reading as a bolted-on appendix.

Can you provide a second opinion on modelling we have already done in-house?

Yes. Peer-review-level checks on hydrology, hydraulic modelling, or dam safety submissions are a common engagement — particularly ahead of a regulatory lodgement or on a contested project where a second professional needs to be able to reopen and verify the work.

Do you do PMF, dam break, or dam safety work, or only floodlines and stormwater?

The full range — PMF analysis, dam break analysis, dam safety evaluations, and TSF water balance work, alongside floodline determination, flood risk assessment, and stormwater management plans.

What is your typical turnaround for sub-consultancy scope?

It depends on the model extent and data availability, same as any hydrology or hydraulics scope — we propose a schedule once we understand what is already available (survey, prior modelling, catchment data) and what still needs to be built.

Hydrology Sub-consultancy for Engineering Fir…

What we offer

Consulting

Flood Risk Intelligence

Flood Hazard Mapping Beta — growing coverage

Custom Software

Flood risk intelligence coverage for this sector

We are building toward national coverage. Each offering below shows where it stands today.

Production

Available today with established methodology.

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Beta — growing coverage

Available for selected regions; expanding nationally.

Flood Hazard Mapping

Roadmap

In development — not yet available as a live offering.

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Why consulting engineers work with us

We work behind the lead consultant, not around them. Deliverables are built to be reopened and verified by a second professional registered with the Engineering Council of South Africa (ECSA) — your own reviewer, a regulator, or a peer on a contested project — with assumptions traced to a source and modelling choices documented, not just a coloured plan and a summary paragraph.

Because hydrology and hydraulics is what we do full-time, we can often move faster on this scope than a generalist team carrying it alongside other disciplines, without sacrificing the review-readiness a multidisciplinary project needs.

How we work with consulting engineering firms

Sub-consultancy engagements typically fall into one of three patterns:

Named specialist input. Hydrology, hydraulic modelling, dam safety, or floodline scope delivered as a defined work package within a larger project, integrated into your report structure.
Surge or gap capacity. Short-term support when your internal hydrology and hydraulics capacity is stretched — a batch of culvert designs, a floodline backlog, or a departing specialist.
Independent peer review. A second professional’s check on modelling your team (or another sub-consultant) has already produced, ahead of a regulatory submission or on a technically contested project.

We are comfortable working to your project’s existing conventions, deadlines, and client-facing protocols — the goal is scope that integrates cleanly, not a visible seam in the final deliverable.

What a peer-review-level check covers

When we pick up modelling your team or another sub-consultant has already produced — whether as a formal peer review or as surge capacity taking over a live model — we work through the same checks regardless of who built it: catchment delineation and design-rainfall inputs against a source, model schematisation (cross-sections, structures, boundary conditions) against survey and as-builts, calibration or validation evidence where gauge or high-water-mark data exists, and whether stated assumptions actually match what the model does rather than what the report claims. Discrepancies here are the ones a regulator or opposing expert finds first, so we surface them to you before a submission goes out, not after.

For dam safety and PMF work specifically, the same logic extends to breach parameters and downstream routing assumptions, since a regulatory reviewer will trace those back to the design storm and dam-break method exactly as we do.

FAQs

Do you work under our firm's name, or are we introduced as sub-consultants?: Either. We are used to working as a named sub-consultant on your letterhead and project documentation, or as a visible specialist input depending on how your client engagement is structured — we scope this with you up front.
Can you pick up a project mid-stream if our capacity changes?: Yes. We regularly step into hydrology or hydraulics scope partway through a project — a capacity gap, a departing team member, or a scope that has grown beyond the original brief. We ask for the existing model, survey, and correspondence so we are not re-deriving assumptions your team has already settled.
How do your deliverables integrate with our report structure?: We match your firm's coordinate system, layer naming, and report format where practical, so our hydrology and hydraulics sections slot into your document rather than reading as a bolted-on appendix.
Can you provide a second opinion on modelling we have already done in-house?: Yes. Peer-review-level checks on hydrology, hydraulic modelling, or dam safety submissions are a common engagement — particularly ahead of a regulatory lodgement or on a contested project where a second professional needs to be able to reopen and verify the work.
Do you do PMF, dam break, or dam safety work, or only floodlines and stormwater?: The full range — PMF analysis, dam break analysis, dam safety evaluations, and TSF water balance work, alongside floodline determination, flood risk assessment, and stormwater management plans.
What is your typical turnaround for sub-consultancy scope?: It depends on the model extent and data availability, same as any hydrology or hydraulics scope — we propose a schedule once we understand what is already available (survey, prior modelling, catchment data) and what still needs to be built.

Sub-consultancy for Consulting Engineering Firms