A regulation of the Rhine was called for, with an upper canal near Diepoldsau and a lower canal at Fußach, in order to counteract the constant flooding and strong sedimentation in the western Rhine Delta. The Dornbirner Ach had to be diverted, too, and it now flows parallel to the canalized Rhine into the lake. Its water has a darker color than the Rhine; the latter's lighter suspended load comes from higher up the mountains. It is expected that the continuous input of sediment into the lake will silt up the lake. This has already happened to the former Lake Tuggenersee.
Where is the upper canal regulation of the Rhine? What is the lower canal regulation of the Rhine? Besides constant flooding, why else was there regulation of the Rhine? After the Dornbirner Ach was diverted, where does the Rhine flow now? What is expected with the continuous input of sediment into the Dornbirner Ach? Where was the Rhine regulated with a lower canal? Why was the Rhine regulated?  Where was the Rhine regulated with an upper canal? What was diverted and now flows parallel to the Rhine? What will cause the lake near the Rhine to silt up?