Kollautich

The Kollauteich is an approx. 0.63 hectare pond or retention basin in Hamburg-Schnelsen near the A7 . He lies in the Vielohwiesen. It is a remnant of the "Düwelsmoors" (high German Teufelsmoor), a swampy lake that dried up in the Middle Ages . Another remnant of this lake is the Teufelssee on Bönningstedter Weg, which has since been artificially changed.

Since 2011, the Kollau has been diverted past the Kollauteich so that the stream is not interrupted. During high water, when the Kollau overflows its banks, the pond serves as a retention basin for the Kollau.

Information sign about the Kollau and the Kollautich

The Kollau pond is often mistakenly treated as the source of the Kollau. However, this is not correct, as the Kollau already runs approx. 450 meters to the Kollauteich and rises at the source pond on Vielohweg on the other side of the A7.

The only tributary of the Kollau pond is the Dübwischgraben , which officially is a tributary of the Kollau. This is due to the fact that the Kollau pond, as the retention basin of the Kollau, is temporarily connected to it, which means that water is exchanged.

Kollautich
View of the pond from the west bank
Geographical location	Hamburg-Schnelsen near the A7
Tributaries	Kollau , Dübwischgraben
Drain	Kollau
Data
Coordinates	53 ° 38 '8 "  N , 9 ° 55' 46"  E Coordinates: 53 ° 38 '8 "  N , 9 ° 55' 46"  E
surface	approx. 0.63 ha
length	approx. 110 m
scope	approx. 320 m
Maximum depth	5 m

Individual evidence

1. ↑ Kollauteich near Hamburg - anglermap water profile. Retrieved July 19, 2020 . 
2. ↑ http://www1.wi-paper.de/book/read/id/0000B590A595064E
3. ↑ District Office Eimsbüttel - conversion of the retention basin Kollauteich - FHH. Retrieved July 19, 2020 . 
4. ↑ Complete list of flowing waters in the Elbe river basin. Retrieved July 19, 2020 .