Knowledge Hub
Sharing best practice in water quality management and pollution prevention
News & guidance
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Working in Water
Working in water can be challenging for constructors but Frog Environmental’s bubble barrier technology and silt products are designed to make projects run smoothly.
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Why it pays to be Rain Ready
Discover how being Rain Ready® can help construction companies manage water quality more effectively
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Bubble Curtains and how they prevent silt
Bubble Tubing® is proven effective in stopping up to 90% of sediment dispersal.
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Zero carbon water treatment systems
In this article we share how our sustainable and practical zero carbon operation water treatment system can protect watercourses and reduce operational costs and carbon footprint for contractors.
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Free Silt Control Toolbox Talk info sheet
We’ve put together a handy planning tool to help your team manage the risk of causing a silt pollution event from your construction site.
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Silt management on construction sites with constrained linear footprints
We make use of interceptor ditches to design passive, low carbon, rain-ready silt management systems for linear construction sites to prevent pollution.
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Flocculant use on a construction site
Basic guidance for the construction industry about when to use a flocculant, what type of flocculant to use and how much of it to use, and advice on managing costs and risks when using flocculants on a construction site.
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Managing silt on construction sites
Before starting your project, sediment and silt management is an essential part of your planning. Silt, soils, mud, clay, and sand are the primary pollutants generated at construction sites, mainly due to erosion of exposed soils by surface water runoff leading to siltation of water courses.
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In the news: Preventing Pollution: Using innovative silt capture at Lowdham Flood Storage Reservoir
The Innovation Magazine, a CIWEM published publication covering environmental best practice, featured our innovative Silt Capture Channel and how it’s being used during the build of a £30 million Flood Storage Reservoir. Working with Jackson Civil Engineering and the Environment Agency, the recent project at Lowdham demonstrates how simple, site-specific solutions can have a big […]
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Videos
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In-ditch Polishing Point installation video
Hear our experts share common sources of pollution on construction sites, including pathways of how silt and sediment can be washed off sites into water courses and how they impact aquatic life.
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Common sources of pollution from construction sites
Hear our experts share common sources of pollution on construction sites, including pathways of how silt and sediment can be washed off sites into water courses and how they impact aquatic life.
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Trapping and retaining silt in streams
Learn about how Silt Mats™ can be deployed directly in channels downstream of earth moving or silt disturbance activities to trap and retain silt and prevent pollution.
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Silt management on the Afon Gwili
We used a range of products including: Floc Mat®, Silt Net, Bubble Tubing®, Silt Mat™ and Silt Wattles on this sensitive river project.
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Removing silt from surface water
Leela, our Technical Director, explains how sediments and silts can be removed from surface waters using our flocculants.
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Managing invasive weeds and litter
A bubble barrier created with Bubble Tubing® can be used in high value aquatic environments to prevent floating weed and litter from entering managed areas such as moorings.
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Training
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Remote training2 hours≤ 10 ppllPre-construction Phase: Silt Control & Surface Water Management
Discover how to plan and prepare your construction site for water pollution prevention in the pre-construction phase and how it can save you time and…
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Remote training2 hours≤ 10 ppllConstruction Phase: Silt Control & Surface Water Management
Learn how to prevent water pollution on construction sites and stay compliant once projects have commenced with specialist training and applied knowledge tailored that can…
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On-site training3 hours≤ 10 ppllIncludes practical demonstration (POD)Construction Phase Silt Control: Get it Right on Site
Site-specific sediment control training with our technical specialists who will provide guidance on how to prevent and respond to silt pollution instances on your site….
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In-person trainingHalf-day session≤ 10 ppllCPD certificationBecome a Silt Control Champion: Digital Award
Become Silt Control Champion Primarily designed for Site Managers, Engineers, Project Managers, Environmental Consultants and other technical and supervisory staff staff, attendees will gain working…
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Remote training1 hourUnlimitedFreeSilt Pollution Prevention: Lunch & Learn CPD
Silt Control Training Silt Pollution Prevention: Lunch & Learn CPD free lunchtime session in which we share proven best practices for silt, erosion and sediment…
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Remote session1 hourUnlimitedFreePollution Prevention whilst Working in Water: Lunch & Learn CPD
Pollution Prevention whilst Working in Water Specifically designed for contractors working in rivers and other bodies of water, this free lunchtime session provides guidance on…
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Remote session1 hourUnlimited participantsFreeBubble Tubing® & OctoAir® Applications: Technology Briefing
deep dive into our market-leading benthic aeration products that are revolutionising water treatment and pollution control, with examples of real-life applications. gradient 1 This technical…
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Remote1 hourUnlimitedFreeSilt Control Products: Technology Briefing
An overview of our award-winning products and the applied knowledge behind the development of our cost-effective long term silt control management solutions for the construction…
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Frequently asked questions
Find out more about our products and applications
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What is a Settlement Test?
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How can I order or get more information?
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Do you offer site assessments or advice?
Events & webinars
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13th November 202512:00 pm – 1:00 pmFree CPD webinar: Preparing your site for winter shutdown
Preparing for winter shutdown is a critical part of good site water management planning. Join our technical team for this free webinar.
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Flood & Coast conference
Visit our technical team and stand at this renowned conference.
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Product installation guides
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Silt Capture Channel
Silt Capture Channels are used to slow the flow of water, and to filter and trap silt and fine sediment.
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Floc Mat®
Designed and manufactured by us, our unique and environmental-friendly Floc Mat® provides a safe, cheap and easy solution to support the removal of pollutants from the water.
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In-ditch Polishing Point
Our bio-engineered In-ditch Polishing Point works within the parameters of existing site infrastructure to create a gravity-fed treatment point for fine, mobilised silt particles, typically generated by clay-rich subsoils.
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Silt Wattle
Deployed directly on the ground, in ditches or used to create low flow channels when working in rivers, Silt Wattles’ low permeability supports natural ground infiltration and helps contain dirty water.
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Silt Mat™
Our Silt Mat products are a 100% biodegradable water quality solution that captures and traps silt and sediment to prevent dirty water from polluting rivers and other waterbodies.
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Gel Flocculant
Clearflow’s Gel Flocculant can be used in many ways to bring optimal performance and water treatment aims to a broad range of projects.
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Pipe Reactor
The Pipe Reactor is our mobile water treatment system that works with specialist flocculant to remove silt and other contaminants.
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Research papers
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Effect of check dams on runoff, sediment yield and retention on small semiarid watersheds
A study on check dams.
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Impacts of flocculation on sediment basin performance and design
This study evaluated a system consisting of three fibre check dams in a lined ditch discharging to sediment basins that differed in their configuration.
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Micro bubble curtains study: impact on sediment dispersal
This study outlines findings of using Bubble Curtains for effective sediment control.
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Influencing river morphodynamics with bubble screens
The reported laboratory experiments demonstrate the potential of the bubble-screen technique to modify the morphology in a variety of applications in shallow rivers and open channels.
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Influencing bend morphodynamics with an air bubble screen
These preliminary experiments show the potential of a bubble screen to influence and modify the bed morphology.
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Reduction of bend scour with an air-bubble screen
These preliminary experiments show the potential of a bubble screen to influence and modify the bed morphology.
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Influencing flow patterns and bed morphology with an air bubble screen
The ability of a bubble screen to redistribute the flow field and bed morphology in shallow rivers and open channels has been investigated in laboratory experiments.
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Mitigating underwater explosion effects with bubble curtains
Mitigation of shocks and noises is made possible by the use of a bubble curtain set around the explosive charge.
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Developing an underwater shock suppression system to mitigate underwater blast effects on marine life
Research findings evaluating the performance of the bubble screens at Roach Cove, an underwater demolition training area.
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