Alte Aller

BW

As Old Aller not fully silted portions are denoted (as oxbow lakes ) of the Aller river section Verden to Baden in Lower Saxony.

The onset and progression

The bed of the river Aller was born, as well as the adjacent river valleys, the end of the last ice age, when the meltwater of retreating glaciers in Scandinavia were looking for a way towards the sea. Through natural processes studied and formed the Aller in the following years in the lower reaches new side arms. The so-called oxbow lakes could dry up or at a later time be part of the main flow (comparable to the situation in river deltas).

The Old Aller is now topographically of two parts:

• The upper portion of the old All is about 2.5 km long and forms with the main branch of the Aller an elongated, narrow island that lies to the west front of the old town of Verden. The striking linear course of Aller in this section suggests that there may be a new river bed was already created in bridge construction. The tangible 100 years ago the river is silted up at the entry point is already at 50 m in length.
• The lower portion of the old All is about 7.5 km long and starts south of the Long -tailed in the district of Verden. From there, the water flows in a westerly direction to the village of Etelsen over to Achim, where it empties in the district of Baden Baden, close to the mountain in the Weser.

The lower part also has drainage channels connect to the Aller and Weser - lock canal.

Importance

The Old Aller is a slow- flowing waters with much vegetation at the edge and in the water. The texture is sandy- muddy with slightly turbid water. The Old Aller has a high recreational value and is frequented by walkers, nature lovers and anglers. Main fish species are currently eel, pike, perch, carp, tench, white fish and crayfish. In the period from May to October, on the Old Aller paddling, approved restricted in accordance with the nature impact. Permits are only paddle boats ( kayaks, canoes and canoe).

Other famous backwaters

In Otersen in Lower Saxony, the seven lakes Oterser also arose from the old course of the river Aller. This bayou was probably after a flood about 1774 and was shared with earthen walls to seven lakes, so that the farmers could take their cattle easier on the pastures of the other side of the river.