Segre-Ebre confluence

The Aiguabarreig is the spot where the Segre river flows into the Ebro right next to the town of Mequinenza, in the province of Zaragoza, in the Aragon region of Spain. It ranks among the largest river confluences in Europe, and a short distance further downstream the Ebro also receives the Cinca river — which is why locals often describe the area as the meeting point of three rivers rather than two. The Segre and Ebro waters join around a small river island and a set of shallows, forming a wide, braided stretch of water flanked on both banks by riparian forest.

Why is this confluence ecologically important?

The confluence area is recognised as a site of special natural significance. Its broad channel, scattered river islands and dense floodplain vegetation create a mosaic of habitats — ranging from dry, steppe-like terrain typical of the nearby Monegros to damp, marshy stretches that echo conditions found in the Ebro Delta, hundreds of kilometres downstream. This variety turns the Aiguabarreig into a transit corridor and wintering ground for numerous waterbirds and wading species that move between the arid interior of Aragon and the Mediterranean coast.

What does the landscape at the confluence look like?

The scenery here is shaped mainly by extensive reed beds, pebble and gravel beaches exposed when water levels drop, and calm backwaters and bends where the current all but disappears. The dense riparian forests lining the banks are difficult to access and in places nearly impenetrable, which further benefits wildlife, giving birds and other animals a refuge away from built-up areas. As part of restoration works aimed at the Segre river near its mouth into the Ebro, a small breakwater-style structure was also built that doubles as a viewpoint, offering a wide panorama over the joining rivers.

How to get there and what to know before visiting?

Mequinenza sits at the fork of three rivers, so the easiest way to reach the confluence is from the town itself, following local roads and paths toward the riverbank. It is worth knowing that water levels in this stretch of the Ebro and Segre are largely regulated by the nearby Mequinenza reservoir, which affects how extensive the beaches and shallows appear at any given time — after large releases of water, wider gravel banks are exposed, while higher water levels push the backwaters further into the floodplain forest.

Frequently asked questions

Is this the meeting point of two rivers or three? Strictly speaking, only the Segre and Ebro join at this exact spot, but the Cinca meets the Ebro a few kilometres further on, which is why the wider area is often described as the confluence of three rivers.

Can it be reached on foot from Mequinenza? Yes, the town sits directly at the confluence, and local roads and paths lead down to the riverbank and the viewpoint.

How is this different from the Ebro Delta? The delta lies many kilometres further downstream at the Mediterranean coast, while the Aiguabarreig is an inland river confluence with a different landscape and habitat type, though both areas play a similar role for migratory birds.

Is the area protected? The confluence has recognised natural value, and ongoing restoration work here aims to protect and restore the rivers' natural dynamics.