31 October 2022
Temporary Dam to Stop Invasive Fish
A Practical Solution in the Ubagua River
When a customer suggested using the Haawal flood barrier to prevent an invasive fish species from migrating up the Ubagua River in northern Spain, we were initially surprised. However, understanding the Haawal system’s strength in adapting to uneven terrain, we quickly realized the potential of this project.
Usecase summary:
Use case: Temporary dam construction
User: Tierras de Iranzu
How many meters: 15 meters
Terrain: In the river, on stones and gravel
Protection height: 120cm
System: Haawal flood barrier
Outcome: Invasive fish stopped from going up the river
The first installation took place in early spring, with the aim of leaving the barrier up through the summer to stop the movement of the invasive species and protect local fish populations. The installation attracted interest from various stakeholders who wanted to observe the barrier’s deployment.
One of the standout features of the Haawal system is its perforated panels, which allow water to flow through during setup. This design makes it possible to install the system even in moving water, a critical advantage for river applications. The process is straightforward: after arranging the panels, the membrane is rolled out on the riverbed and weighed down, and the support wires are attached to the ground panels. When everything is ready, the membrane is raised, and the steel ropes are attached to the wall panels, creating an effective barrier.
The setup was highly successful, demonstrating both the system’s durability (the barrier stood resiliently in the flowing river for months) and its adaptability to uneven terrain.
Today, this Haawal barrier is deployed every spring and remains in place through the summer, successfully safeguarding the Ubagua River’s native fish.
The local river agency made a video explaining their creative use of flood protection. You can watch it here.