Neither the intention to vote nor the football team nor of course the borders: Europe is divided from east to west and from north to south by an invisible line that divides the old continent in two to answer a question: where each and every one of them travels. the drops of rainwater that fall in Europe. Because each white line that crosses the map represents one of the many rivers that run through each and every state and its color reveals where it will end: the northern slope in blue includes the Atlantic Ocean, the North Sea or the Baltic Sea and the southern slope in red, for the Mediterranean Sea, the Black Sea, the Adriatic Sea or the Caspian Sea.
Although the line from the Strait of Gibraltar to the Ural Mountains and the distinction between the frigid open water masses of the north and the inland seas of the south is clear, the practical reality is intuitively more blurred: the difference between one destination and the other can be only a few meters in altitude in the Alps.
This map displays the hydrographic basins of Europethat is, the geographical areas where all surface water converges towards the same drainage point, in this case the seas and oceans that surround the continent. That line is the great divide continental, in this case simplified compared to its most rigorous version to reduce it to the north and south slopes. The author of the map is the French cartographer Pierre Remonté from the source Natural Eartha public domain vector mapping project developed by the North American Cartographic Information Society (NACIS).
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A more exhaustive alternative to the continental divides in Europe. Kimdime
The great watershed of Europe
On the northern and western slopes, the very long Rhine stands out, 1,230 kilometers long, which originates in the Swiss Alps and flows into the North Sea through Rotterdam, in addition to the Elbe, the Oder and the Vistula, which end in the Baltic or the Seine and the Loire that flow towards the Atlantic. Mighty rivers that have historically been commercial arteries of central Europe to reach the Atlantic and the Baltic.
On the southern and eastern slopes, the absolute protagonist is the Danube, with 2,860 kilometers, which passes through 10 states and empties into the Black Sea. It is accompanied by the Dnieper that goes to the Black Sea, the Po that reaches the Adriatic or the Rhône and the Ebro that end in the Mediterranean. This basin is characterized by more variable water regimes and a geography marked by the large southern peninsulas.
The Great Continental Divide, by Pierre Remonté
The shape of this divide is not random: it is the direct consequence of millions of years of tectonic processes, mainly the collision between the African and Eurasian plates. The areas where the color changes coincide with the peaks of the Alps, the Pyrenees and the French Massif Central, which act as “roofs” that divert runoff to one side or the other. From a geological point of view, this map is a reflection of the structural relief of the continent. On the high peaks of Switzerland or Austria, the direction of the wind or the inclination of a rock of just a few centimeters can decide whether melted snow will end up on the coasts of the Netherlands or in the Danube delta in Romania.
Some curiosities. One of the most interesting situations occurs in Munich: a drop that falls in that German city will reach the Isar, then the Danube and then travel more than 2,000 kilometers to the Black Sea. However, less than 100 kilometers away, a drop that falls there will end up in the North Sea. In some parts of the Alps, this divide means that extremely close geographic places belong to basins with final destinations thousands of kilometers apart.
In the Iberian Peninsula there are also rarities: the longest and largest rivers flow into the Atlantic, but there is a notable exception that breaks this trend, the Ebro. Thus, situations arise such as that of Pamplona, located less than 100 kilometers from the Atlantic (Cantabrian Sea): a drop that falls in the Navarrese capital will reach the Arga and from there to the Ebro to end up in the Mediterranean.
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Cover | Perrin Remonté
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