Exhibiting at the the Flood Expo

Hydro International

Our flood warning and flood prevention systems can help you protect and prevent flooding of businesses, homes and infrastructure. Visit us on stand D46 to find out more.

Flood Management Services

Understand, mitigate and plan for flood events with expert flood monitoring, modelling, forecasting and warning services.
Our flood services help people, companies and public organisations to understand their current and potential future flood risk, enabling them to mitigate and plan for flood events and minimise or prevent damage and disruption to homes, businesses and infrastructure.
Our Capabilities
Flood Warning and Forecasting
We are the leading independent provider of flood warning systems to local authorities in the UK, having installed over 830 flood warning sites for over 75 councils and land drainage authorities. Our systems provide early warning to both drainage authority staff, to deploy maintenance teams, and to local residents, to deploy property level protection or trigger local flood plans.
Flood Risk Assessments
We have extensive experience in undertaking both FRAs and Flood Consequence Assessments (FCAs) for housing, commercial, agricultural, power, leisure and quarrying applications.
Flood Risk Assessments (FRAs) are a formal requirement to support many planning applications. Specific requirements apply in England, Wales and Scotland, but in general, FRAs need to demonstrate whether a proposed development is likely to be affected by any type of flooding and whether it will increase flooding elsewhere.
Flood hydrology and modelling
Flood hydrology entails the calculation of flood peaks or flood hydrographs for observed floods or for design floods for specified return periods. Our expert consultants use UK Flood Estimation Handbook (FEH) methods in undertaking FRAs and in support of hydraulic modelling, enabling us to appreciate situations in which the methods work well and critically, and the conditions in which they require some refinement.
Hydraulic modelling
Our hydraulic modelling services provide accurate estimation of water levels and flood extents for rivers and watercourses. Although UK flood extents are shown on the Environment Agency website, these are often based on the use of generalised models; detailed, site-specific modelling can be used to refine and challenge the flood maps. The models can also be used to estimate flow velocities and the associated flood hazard ratings.
Flood mitigation
Flood mitigation is an essential component of the work that we undertake for FRAs. Mitigation ranges from the design of drainage measures such as soakaways through to the design of flood balancing reservoirs.

Our Hydro-Logic® Smart Monitoring Data Loggers
Get reliable water flow data to enable effective water resources management, hydraulic analysis and flow control monitoring.
Accurate, reliable remote capture of water level, flow, weather and quality data enables engineers, municipal organisations and consultants to carry out critical flood mitigation, water resource planning and long-term environmental research activities.
Monitoring Weather
A comprehensive monitoring network may consist of temperature and precipitation, solar radiation, air pressure, wind, soil moisture, river and oceanic variables.
Rainfall is a prime upstream indicator of potential flood risk, and monitoring systems that measure climatic factors such as this can provide insight into imminent flood events. However, rainfall alone does not take into account contributory factors such as ground water, river levels or (in some regions) snow melt.
As such, while meteorological measures might provide an indicator of probability of flooding, they may be insufficient on their own to provide accurate, location-specific flood warning and should therefore be factored into a more comprehensive monitoring network.
The ability to monitor current and trending weather variables is especially important for the management of water resources and rainfall is just a single factor. The effects of wind, sun, changing pressure, humidity, etc. all play a part and these data are important components of a comprehensive management system.
River flow - this is calculated using a distributed rainfall-runoff model using the output from the rainfall model.
Monitoring for droughts - one of the most important uses for rain gauges is to monitor droughts in areas reliant on agriculture, as well as cities that don`t get much rain.
Monitoring for floods - this is often used in conjunction with level to create a catchment model.
Monitoring Water Levels
River level is the depth of water at a monitoring station, measured in metres to a specified datum.
A good indicator of flood risk are the water levels in natural and man-made bodies of water such as rivers and sewers. These water levels represent a tangible, realistic measure of the volume of water that is being conveyed downstream, and can provide accurate signals as to likely flooding.
Monitoring watercourses like these upstream of homes, businesses and infrastructure provides a reliable measure of flood risk, and water level monitoring systems can form the core of an effective flood warning system.
Monitoring Flow
Flow is the volume of water passing a monitoring site, measured in cubic metres per second. Flow can be measured directly or derived from continuous measurements of river level and water velocity.
River flow forecasting is very important as a basis for early flood warning
As flow is a function of river level and velocity it is possible to get different values of flow for the same level. This can happen if the characteristics, for example, roughness of the channel, change as the result of a flood or from the growth of vegetation.
Monitoring Water Quality
Effective water quality monitoring is the key to environmental protection of watercourses and for reliable process control and wastewater treatment. Discharge consents under EPR regulations dictate that water quality monitoring is undertaken to ensure that consented parameters are below the consented concentrations.
Traditionally this has been done using water quality sampling methods, but increasingly automatic water quality measurement sensors linked to real-time telemetry is seen as the most reliable and timely means of ensuring that treatment processes are operating efficiently and that EPR compliance is maintained.
Hydro-Logic® Flexi Loggers
We have three types of Hydro-Logic® Flexi logger and they each have attributes that can make them ideal for some applications and not others. Please use the table below to choose the logger that`s right for you:

Hydro-Logic® Flexi Logger 100

Robust to IP68 standard, the Hydro-Logic® Flexi Logger 100 is ideal for installation into remote or space constricted applications

Hydro-Logic® Flexi Logger 200

Hydro-Logic® Flexi Logger 200 has an integral display panel and ideal for installation into control panel cabinets of permanent installations.

Hydro-Logic® Flexi Logger 300Ex

ATEX certified, the Hydro-Logic® Flexi Logger 300Ex is ideal for installation in chambers or tanks where a potentially explosive atmosphere may be present.
Automatically process and manage hydrometric data to provide alarms and early warning of flood events and other environmental risk factors.
Hydro-Logic telemetry systems provide an online platform for basic data visualisation, inspection and early warning on an annual subscription.
Automatically receiving data from remote Hydro-Logic® data loggers, Hydro-Logic® telemetry systems provide an interface to enable you to inspect data outputs, helping you to identify potential system blockages and alerting you to changes in environmental conditions that could indicate an imminent flood event.
Hydro-Logic® telemetry systems also manage any automated alerts that have been configured, distributing them via e-mail or SMS to designated recipients to provide early warning of flood events or other environmental risks.

Hydro-Logic® Timeview

Hydro-Logic® Timeview provides automatic wireless receipt of data from remote sensors, triggering automated flood event alarms, providing short-term data storage and enabling data visualisation and initial analysis.

Flood Prevention Flow Controls
The Hydro-Brake® Flow Control Series
Hydro International`s Hydro-Brake® Flow Control Series is a comprehensive and versatile toolbox of precision-engineered devices for managing surface water, watercourse and foul/combined sewer flows.
These controls can help:
• Deliver compliant schemes with scalable, precision flow control performance.
• Precisely balance flow rates and upstream storage requirements on every project.
• Save land-take and costs with optimised flow control performance.

Hydro-Brake® Flood

Protect homes, businesses and infrastructure from flooding.
Hydro-Brake® Flood provides large-scale protection at the watercourse level, preventing costly damage and disruption to residents, businesses and essential services.
Hydro-Brake® Flood is a highly sustainable, precision-engineered vortex flow control that provides large-scale protection at the watercourse level. It prevents flooding by holding back excess waters in temporary flood storage areas.
Suitability: For watercourses; flood storage reservoirs
Flow Range (l/s): 550 - 12,000 *
* Higher flows and heads possible.

Find out how Hydro-Brake Flood protects over 600 properties in Wigan, cutting flood risk to 1% and watch a video of the system in action...

Hydro-Brake® Optimum

Manage low, moderate and high flows to deliver sustainable drainage from single sites to large networks.
The Hydro-Brake® Optimum vortex flow control provides customised water quantity management for surface, foul or combined water across a wide range of flows and for a variety of applications.
Precision-engineered to meet site-specific flow, head and storage requirements, only the Hydro-Brake® Optimum leverages more than 30 years of vortex flow control expertise to deliver exceptional flood protection and sustainable drainage.
Suitability: Most sites, from very low to very high flow rates.
Flow Range (l/s): 0.7 - 550 *
* Lower flows possible.

Find out how Hydro-Brake® Optimum helped Cornwall Council solve a car park flooding problem

Hydro-Brake® Agile

Reduce upstream storage and manage flood risk at sites with stringent discharge consents where space for on-site attenuation is at a premium.
Hydro-Brake® Agile is a float-operated flow control, the only design that achieves a constant rate of discharge and therefore the minimum possible upstream storage.
Suitability: Constrained sites with stringent discharge consents.
Flow Range (l/s) : 4.5 - 100

Hydro-Brake® Orifice

Manage moderate flows and deliver sustainable drainage at site and development level.
The Hydro-Brake® Orifice is a precision-cut, sharp-edged orifice plate flow control, that delivers cost-effective, precise flow control.
Suitability: Unconstrained sites with generous discharge consents.
Flow Range (l/s): 2.5 - 100
Our Geocellular Storage & Infiltration Systems

Stormbloc® Optimum

Attenuate surface water and stormwater effectively even in challenging high-traffic urban environments.
Stormbloc® Optimum is a resilient geocellular storage system that provides underground storage and infiltration of urban runoff. Lightweight materials combined with robust design make it easy to transport, quick to install and extremely durable, even beneath high-traffic areas such as roads, car parks and warehouse yards.
Stormbloc® Optimum is a modular and easily customisable water management solution, giving engineers the freedom to configure storage for even the most challenging SuDS project.


Store and infiltrate surface water and stormwater even on difficult or irregular sites.
Stormcell® is a high-capacity, low-maintenance modular stormwater and surface water storage system that can be customised to suit shallow, deep or irregular sites. Its flexible modular structure is light but strong, making it ideal for use beneath areas such as roads, car parks and industrial areas.
With a design that ensures that solids are washed through the pipework rather than into the storage area, the system requires very little maintenance.

About Hydro International
Hydro International Ltd is a global company that provides advanced products, services and expertise to help municipal, industrial and construction customers to improve their water management processes, increase operational performance and reduce environmental impact.
With over 30 years of experience and a reputation for engineering excellence, businesses and public organisations all over the world rely on Hydro International products and services to reduce flood risk, improve water treatment and protect the environment from water pollution.
Headquartered in Clevedon, UK, Hydro International has a network of over 80 distribution partners and serves customers in more than 40 countries.

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01275 878371

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