The Paraguay river, the motorway of a landlocked country

You get used quickly to seeing the river from Asunción's Costanera and treating it as scenery. Then you notice that the still shapes out in the current are not boats: they are convoys of barges lashed together, as wide as a city block, moving slowly south.

A country without a coast

Paraguay is one of South America's two landlocked states. Everything that leaves the country — soy, maize, beef, vegetable oil, timber — and much of what enters must reach the ocean across somebody else's territory. The main route is fluvial: the Paraguay river running down into the Paraná, and the Paraná reaching the ports of the Río de la Plata.

That geographical fact is not one logistical detail among many. It is the structural constraint around which the whole external economy is organised, and the reason transport costs and transit times carry a weight here that would be hard to imagine in a coastal country.

How a convoy works

The barges have no engines. They are tied into rectangular formations and pushed by a tug positioned at the stern. A single convoy can carry the equivalent of hundreds of articulated lorries, with fuel consumption per tonne far below road transport.

The river fleet operating on this waterway is among the largest in the world by number of units, and a significant share flies the Paraguayan flag. It is one of the sectors in which the country has developed less obvious technical and industrial capability: shipyards, maintenance, convoy management, crew training.

The water decides

The real constraint is the river level. In flood season convoys load to full draught; in low water they have to reduce cargo, split the formation, or wait. A year of low water translates directly into higher export costs and longer delivery times.

Anyone working in import and export from Paraguay learns early to read the hydrological calendar alongside the commercial one. Scheduling a shipment without it is the fastest way to find out the hard way.

What you see from the bank

Beyond the numbers, the river has another register. It is very wide, coffee-coloured, fringed with floating vegetation drifting downstream; there are fishermen with hand nets two hundred metres from the office towers; there are herons, and at dawn a low mist that erases the far shore.

The Costanera is the best place to watch it, and it is worth doing at least once with the right idea in mind: this is not a view. It is the country's most important piece of infrastructure.