Curnera, Rein da Maighels, Rein da Cristallina, Rein da Nalps, Rein da Plattas, Rein da Sumvitg, Rein da Vigliuts, Valser Rhine Posterior Rhine basin: Rein Posteriur/Hinterrhein, Reno di Lei, Madrischer Rhein, Avers Rhine, Jufer Rhein Albula-Landwasser area: In the Dischma valley, near Davos, far east of the Rhine, there's a place called Am Rin ("Upon Rhine"). A tributary of the Dischma is called Riner Tälli. Nearby, on the other side of the Sertig, is the Rinerhorn. Alpine Rhine Next to Reichenau in Tamins the Anterior Rhine and the Posterior Rhine join and form the Alpine Rhine. The river makes a distinctive turn to the north near Chur. This section is nearly 86 km long, and descends from a height of 599 meters to 396 meters. It flows through a wide glacial Alpine valley known as the Rhine Valley (). Near Sargans a natural dam, only a few meters high, prevents it from flowing into the open Seeztal valley and then through Lake Walen and Lake Zurich into the Aare. The Alpine Rhine begins in the westernmost part of the Swiss canton of Graubünden, and later forms the border between Switzerland to the west and Liechtenstein and later Austria to the east. As an effect of human work, it empties into Lake Constance on Austrian territory and not on the border that follows its old natural river bed. The mouth of the Rhine into Lake Constance forms an inland delta. The delta is delimited in the west by the Alter Rhein ("Old Rhine") and in the east by a modern canalized section. Most of the delta is a nature reserve and bird sanctuary. It includes the Austrian towns of Gaißau, Höchst and Fußach. The natural Rhine originally branched into at least two arms and formed small islands by precipitating sediments. In the local Alemannic dialect, the singular is pronounced "Isel" and this is also the local pronunciation of Esel ("Donkey"). Many local fields have an official name containing this element. 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