The reinforcement of the coastline in Deltebre begins, once the works on the island of Buda have been completed
The sand contribution project to reinforce the Ebro delta coastline begins on the left bank, in the municipality of Deltebre, when the action on the island of Buda has already been completed and continues on the Trabucador bar.
The machines began to extract the sand from the Fangar tip to deposit it in the Marquesa area. There is a route of 8 kilometers from the exact point where the material is extracted, where it accumulates, to the point of arrival, one of the areas most affected by the regression.
The project of the General Directorate of Coasts of the Ministry for the Ecological Transition maintains the planned deadlines for the moment, as a result of the meteorological bonanza that has allowed working every day (during the week). The goal is to finish the work in March, before the bird nesting period begins in the Delta.
The works, with an investment of 4 million euros and carried out by the public company Tragsa, are carried out with the advice of the Polytechnic University of Catalonia and in a consensual manner with the territory, to interfere as little as possible in the activities of the area, that is, tourism, hunting or elver fishing, as detailed in the Diari fonts de Costes.
Thus, in Deltebre work has begun on the northern area of the Pal pumping station once the tourist season is over. The Balsa de la Arena area and even Riumar are left for after Christmas, to interfere as little as possible with the eel season. In this area, the works, with a contribution of 150,000 cubic meters, will place the sand perpendicular to the coastline, to expand the beach. The objective is to widen it between 25 and 30 meters, since there are points where the riverbank is only 40 meters from the rice fields and this, in times of strong storms, involves the invasion of seawater to the farms.
As for the island of Buda, with the 17,000 cubic meters of sand poured from the nearby Serrallo beach (in the Sant Jaume de Enveja district), a discontinuous double dune system has been created to protect the coastline from the beating of the waves. Initially, a pyramidal structure was planned in the north of the beach, to feed the dune system, but finally the technicians opted for this double system of dunes as the optimal one for the area.
A double protection dune system is also being set up in the Trabucador. The work there started at the beginning of October and will last until March, since it is the area that most worries. 150,000 cubic meters of sand will also be provided to create a discontinuous and alternate double system, attached to the edge of the access road, to hinder possible new breakages of the bar. Thus, it is expected that in small storms the water can transfer from the outer sea to the interior in a more or less orderly way, and in the event of a more important storm, the dunes would be laminated but incorporated into Trabucador itself. "What is sought is to gain height from the beach, to avoid a new break," explain sources from Costas. These works will last until Christmas. Subsequently, the action will focus on finishing rectifying the orientation of the bar, which was modified during the Gloria storm. Before, it had an orientation of 32º north south. New sands will be provided at strategic points to restore this orientation, so that the isthmus is more homogeneous and therefore more resistant.
“Somehow what we do is reverse natural processes, take the sand from where it accumulates to where it is being lost. We are clear that this action can last from 2 to 5 years, depending on the weather. But it is the most sustainable and natural way to defend the current morphology of the Delta”, they point out from Costas. In short, the performance is a kind of rehearsal of what awaits him in the Delta in the future. Carry out permanent monitoring of the evolution of the coastline and carry out actions periodically, when necessary, either by land or by sea, with dredgers. This is, among others, what the Delta protection plan must define, pending presentation by the State.
The work schedule has been agreed with town halls, irrigators, fishermen and hunters