Oceanography · Hydraulics · Hydrology · Meteorology
Science-based answers for water, coast and climate
NEREUS is an independent consultancy in hydrology, hydraulics, oceanography and meteorology. We combine field data, numerical modelling and expert judgement to give public and private clients clear, defensible answers.
Who we are
Named after the truthful Old Man of the Sea
In Greek mythology, Nereus was the Old Man of the Sea: wise, truthful and deeply familiar with the secrets of the ocean. We have taken his name as a commitment to rigorous science, honest advice and answers our clients can rely on.
About NEREUS
What we do
Five disciplines, one integrated view of water
Oceanography
Waves, currents, tides and sea level, measured, modelled and turned into design criteria.
Explore OceanographyHydraulics
Coastal, estuarine and river hydraulics for ports, structures and flood protection.
Explore HydraulicsHydrology
Rainfall–runoff, floods, droughts and water resources, from catchment to city.
Explore HydrologyMeteorology & Climate
Weather and climate analysis, extreme events and climate change risk.
Explore Meteorology & ClimateNumerical Modelling
Validated hydrodynamic, wave and atmospheric models, backed by sound data science.
Explore Numerical ModellingNot sure where your challenge fits?
Tell us about it and we will put the right specialists on it.
Our approach
From the question to a clear answer
- 01
Understand
We define the question, the decisions it must support and the data available.
- 02
Measure
We gather and quality-check field, satellite and reanalysis data.
- 03
Model
We build, calibrate and validate numerical models that are fit for purpose.
- 04
Advise
We turn results into clear conclusions, design values and recommendations.
Who we help
Sectors we support
Ports and maritime
Layout, operability, siltation and design conditions for maritime works.
Explore sectorCoastal management
Erosion, flooding and nature-based coastal solutions.
Explore sectorOffshore and marine renewable energy
Metocean design bases, site characterisation and weather windows.
Explore sectorWater management and utilities
Flood risk, water resources, drainage and river restoration.
Explore sectorPublic sector and climate adaptation
Climate risk assessments, adaptation plans and technical support for policy.
Explore sectorEnvironment and aquaculture
Environmental impact studies, water quality and dispersion, and site selection.
Explore sector
Why NEREUS
What you can expect from us
Independent advice
We have no products to sell. Our recommendations follow the evidence.
Specialists on every project
Your project is handled directly by specialists, not passed down a long chain.
Science you can audit
Transparent methods, documented assumptions and quantified uncertainty.
Clear deliverables
Reports, maps and data written for decision-makers, not only for specialists.
Have a question about water, coast or climate?
Tell us about your project. We aim to reply within two working days.