'Lea Bridge Bubble Curtain' by ISS-Flowthrough

ISS-Flowthrough Lea Bridge Bubble Curtain.

On the River Lea Navigation, close to the Middlesex Filter Beds Weir, there is a stream of bubbles that rise in a line across the width of the river. This is the ISS-Flowthrough Bubble Curtain.

I found it to be quite calming and therapeutic as I gazed at it from the Capital Ring, that runs along this part of the River Lea. 

Middlesex Filter Beds Weir.

However, it is not unique, as there is also one at Shadwell Basin, plus many more around the country and internationally, but each one is bespoke to the area in which it is used.

The Canal and River Trust, who manage the watercourse, committed vast personnel and resources, that they could barely afford, being a Charitable Trust, in the collection of debris and litter, which would have ended up in the River Thames and, eventually, the sea. They approached ISS-Flowthrough in the hopes of finding a solution.

The solution was a bubble barrier. This barrier would arrest issues that were impacting this navigable channel. These issues included, excessive growth of aquatic plants which interfered with river traffic, saline intrusion from the tidal River Thames, of which the River Lea is a major contributory, water quality from storm overflow discharges and, because of its urban setting, a large amount of floating debris.

Bubble Curtain.

The bubble barrier was designed with a rubber membrane disc diffuser and had to meet specific criteria for the area. This included, ensuring that the River Lea Navigation was still accessible to river traffic, be highly robust and be low maintenance and prevent the downstream movement of litter and facilitate its collection.

The bespoke bubble barrier, installed in May 2020, was set at an angle across the river, thus ensuring that any litter or debris, coming upstream, would be redirected to a collection point. This collection point was created by using the existing bridge buttresses and the channel wall.

So, if you are ever passing this way, stop and take in this calming bubble curtain that helps to keep this waterway clear of litter and excessive plant growth, while still keeping the channel open to boats and other river traffic.