Ammersbek Weir

The Ammersbek usually flows sluggishly here, but sometimes it carries a lot of water, as can be seen in these pictures. Here is the first stowage, two more come before it flows together with the Alster just a few hundred meters further, shortly before the lock sledder.

The Duvenstedter Brook nature reserve is located in the extreme northeast of Hamburg in the Wohldorf-Ohlstedt district and is congruent with the FFH area of the same name and the EU bird sanctuary of the same name.
On an area of 785 hectares, the Duvenstedter Brook was placed under protection in 1958, the middle section as early as 1939.
Today, together with the nature reserves Wohldorfer Wald, Ammersbek-Niederung and the Hansdorfer Brook in the municipality of Jersbek, district of Stormarn, it forms a complex of Germany-wide importance with the largest deer population in Germany - after the opening of a red deer gate after the Second World War.(Source: Wikipedia)

The weir keeps the Ammersbek in check before it meets the Alster