Alpe (Aller)
The Alpe is a river of Lower Saxony, Germany.
The Alpe is a left tributary of the Aller. Its source lies between the villages of Dudensen and, both within the town of Neustadt am Rübenberge. It initially crosses the Dudensen Bog and flows along the edge of the Bog and past Rethem Bog. In the 1970s it lost its natural character, it was straightened and, in places, canalised. The Steimbker Dorfgraben, a drainage ditch joining it form the left is very heavily polluted. The Alpe itself has a good overall water quality.
Before the town of Rethem the Weiße Graben joins the Alpe along with the Wölpe. In Rethem the Alpe then discharges into the Aller.
