Modifications along the Upper Rhine

Until the 18th century, the Upper Rhine was a natural river with a network of ramifications and small river loops (meanders). In the 19th century, the main stream was modified into a regularly flowing, straight and reveted water course with flood dikes. The aim was to make the river navigable and to use the floodplains for agricultural purposes. After World War I the treaty of Versailles (1919) gave France the sole right to use the hydropower of the Upper Rhine. Eight barrages have since been constructed (Kembs, Ottmarsheim, Fessenheim, Vogelgrün, Marckolsheim, Rhinau, Gerstheim, Strasbourg). They interrupt the ecological continuity of the Rhine and are obstacles for migratory fish. The barrages and the power plants Gambsheim (1974) and Iffezheim (1977) are based on a Franco-German treaty of 1969. Today, both hydropower plants are equipped with fish passages.

Rhine around 1838 (Source: Generallandesarchiv Karlsruhe)
Rhine 1872 (Source: Generallandesarchiv Karlsruhe)
Rhine 1980 (Source: Landesvermessungsamt Stuttgart)

Updated pages

If an accident occurs or great amounts of hazardous substances flow into the Rhine, the international Warning and Alarm Plan Rhine is activated. (05. 02. 2016)
Flood risk management plan (to be concluded by December 2015; updates every 6 years); flood forecast and early warning systems (02. 02. 2016)
 (29. 01. 2016)
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