How did engineers change the upper Rhine River during the 19th century?

During the 19th century, engineers significantly altered the upper Rhine River to improve navigation and manage the landscape. Between 1817 and 1874, the river was subjected to a major project of canalization, which involved confining the waterway within an artificial bed and straightening its course.1

Prior to these interventions, the upper Rhine flowed across its floodplain in a series of large, natural loops or meanders. The straightening process eliminated these curves, and today, the remnants of the river's former path can still be seen as old backwaters and cutoffs near areas such as Karlsruhe and Breisach. While these engineering efforts were intended to enhance the river for transport, the resulting improvements were not entirely satisfactory, as navigation on the upper Rhine continued to be hampered by swift currents and seasonal variations in water flow.21