Water & Marine

Water & Marine

Hydrological & flood modelling

Use terrain, rainfall and water-flow information to assess flooding and drainage.

Discuss this service

What you receive

  • Catchment and drainage maps
  • Model files and input register
  • Scenario-specific inundation/depth/velocity outputs
  • Assessment, limitations and mitigation options
How we deliver

Scope & options

Hydrology estimates rainfall–runoff response; hydraulic modelling simulates flow, depth and velocity through channels/floodplains.

Inundation maps are scenario outputs tied to model boundaries, terrain and forcing assumptions.

Drainage assessment combines catchments, conveyance paths, structures and design events rather than contours alone.

Explore 5 service variants

Rainfall–runoff and drainage assessment

Estimate runoff and assess drainage under stated scenarios.

Design criteria and rainfall inputs require competent engineering review.

Hydrometric and ADCP discharge survey

Measure flow and water levels to support the model.

Requires appropriate instruments, access and measurement conditions.

Dam-break analysis and emergency-plan mapping support

Map consequences of specified dam-failure scenarios.

Specialist dam-safety modelling supports, but does not replace, an approved emergency action plan.

Hydrogeological and groundwater-recharge assessment

Evaluate groundwater conditions and recharge opportunities.

Hydrogeologist-led interpretation is included where scoped; drilling and abstraction permissions are separate. Geotechnical drilling is outside this live service and appears separately in the Education section.

Water-quality sampling coordination

Collect spatially referenced water samples for specified analyses.

Qualified sampling, chain of custody and laboratory scope must be agreed.

Useful to know

Terms, explained
Hydrology
Assessment of rainfall, runoff and catchment behaviour.
Hydraulic model
Numerical representation of water movement through channels, structures and floodplains.
Inundation map
Mapped extent and, where modelled, depth or velocity for a stated scenario.
Are contours enough to predict flooding?

Rainfall, catchment behaviour, channels, structures and downstream conditions can materially affect results. Terrain is only one model input.

Can you guarantee that my site will never flood?

Results apply to the stated scenarios, data and assumptions. Unmodelled events, changes and uncertainty remain.

What is needed for a dam-break study?

An authorised owner brief, dam and reservoir information, suitable downstream terrain and a specialist modelling scope. Sensitive material should use an approved transfer channel.

Can a groundwater map guarantee a productive borewell?

Hydrogeological and geophysical evidence can guide investigation, but it does not guarantee yield. Drilling and pumping tests are separate activities.

Method & limitations

Distinguish catchment runoff modelling from hydraulic flow simulation.

Document inputs, scenarios, calibration and boundary assumptions.

Provide model outputs and decision support, not a flood-free guarantee.

Design criteria and rainfall inputs require competent engineering review.

Requires appropriate instruments, access and measurement conditions.

Specialist dam-safety modelling supports, but does not replace, an approved emergency action plan.

Hydrogeologist-led interpretation is included where scoped; drilling and abstraction permissions are separate. Geotechnical drilling is outside this live service and appears separately in the Education section.

Qualified sampling, chain of custody and laboratory scope must be agreed.

Sources & references

Your project

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Hydrological & flood modelling

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Help me ask
  • Which flood scenarios should the project be assessed against?
  • What rainfall, drainage and downstream data is missing?
  • Will I receive the model files and assumptions, not just a map?
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Personal addresses are accepted for civilian enquiries and individual training.
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Examples: ground-only work, no cloud hosting, limited access. Do not include personal IDs, confidential documents or sensitive locations.
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Unknown is acceptable. Apply WGS84/UTM or a local benchmark only when it is confirmed for the job.Leave blank if unknown.
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Optional specialist variants
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