 It carries 160 million tonnes of suspended sediment (about half of it coming from the Bermejo River through the Paraguay River) and advances from (depending on the source) per year over the Río de la Plata.It is the world's only river delta that is in contact not with the sea but with another river.The Lower Delta was the site of the first modern settlements in the Paraná-Plata basin and is today densely populated, being the agricultural and industrial core of Argentina and host to several major ports.