Ihlsee
| Ihlsee | ||
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| View of the Ihlsee from the bathing area | ||
| Geographical location | Segeberg district , Schleswig-Holstein | |
| Tributaries | none, surface water | |
| Drain | artificial overflow towards the Trave | |
| Places on the shore | Bad Segeberg | |
| Data | ||
| Coordinates | 53 ° 57 '36 " N , 10 ° 17' 55" E | |
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| Altitude above sea level | 28 m | |
| surface | 0.291 km² | |
| volume | 2.15 million m³ | |
| scope | 2.2 km | |
| Maximum depth | 21.5 m | |
| Middle deep | 7.7 m | |
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particularities |
Low in nutrients |
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The Ihlsee is located in the north-western urban area of the district town of Bad Segeberg on the northern edge of the Kleinniendorf district and is part of the designated Ihlsee and Ihlwald nature reserve . Adjacent villages are Schackendorf in the west and Klein Rönnau in the northeast.
Waters
The formation of the lake has not been fully investigated. Either the depression was formed after the Ice Age due to dead ice or it was created as a sinkhole when a cave collapsed in the Segeberg Salt Dome.
Today the lake has an area of about 29 hectares and extends 450 m in north-south direction and about 850 m in west-east direction; the shore length is 2.25 km. The lake is one of the few nutrient-poor lakes in Schleswig-Holstein .
The lake is in a depression and has no inflow. It is only fed by groundwater and incoming surface water (precipitation). North of the bathing area is the drain that connects the lake with the Great Segeberger See .
Surroundings
The lake can be completely circled by a paved riverside path. On the eastern bank there is a bathing area that has existed for decades, the bathing water quality is regularly monitored and has been rated as very good to good in recent years . There is a residential area on the north bank. On the western and southern side, the Ihlwald, a break forest , defines the bank. From 1911 to 1961 there was a train station for the Kleinbahn Kiel – Segeberg at Ihlsee , the tracks of which were removed in 1962.
natural reserve
The Ihlsee was placed under nature protection as early as 1950 because of its special features. The lake is a particularly nutrient-poor body of water, which produces a rare flora. After extensive investigations in 1975 and 1994 it was found that the lake threatened to tip over in the direction of nutrient-rich waters. This resulted in demands to reduce excessive nutrient discharges and measures for remediation. But even with massive restrictions on bathing, a ban on fertilizers on the northern garden plots and a ban on feeding the existing fish population, the lake can no longer be returned to its original nutritional deficiency. Today the lake is part of the Ihlsee and Ihlwald nature reserve and has been part of the Natura 2000 network of protected areas since 2006 .