Blautopf
The deep-blue, funnel-shaped karst spring in Blaubeuren that is the outlet of the Blauhöhle system. A popular sightseeing spot; diving is reserved for the permitted research group.
The Blautopf is a roughly 22 m deep, funnel-shaped spring pool in the centre of Blaubeuren. Its striking blue colour comes from sunlight: the deep water absorbs the other colours, and reflections off fine calcium carbonate particles intensify the blue. Water leaves the pool as the Blau river.
The pool is the underwater entrance to the Blautopfhöhle, part of the Blauhöhle system. Divers first reached the bottom in 1957, and the cave beyond has been explored by research divers since; today diving is carried out by ARGE Blautopf under a permit held since 1997, and the cave is not open to visitors.
The grounds around the spring have been under renovation since August 2024, with access to view the Blautopf maintained during the works.
环境
Cold karst spring water (about 9 °C) flowing out of a funnel-shaped pool; discharge and clarity vary strongly with rainfall.
环境条件
Mean outflow about 2,300 L/s, over 30,000 L/s after heavy rain (town figures).
典型范围来自已发表资料，不代表当前实际状况。
设施
Town-centre location; tourist information at Kirchplatz 10, Blaubeuren.
本页所有信息及其来源 (7)
| 信息条目 | 状态 | 来源 |
|---|---|---|
| The Blautopf is a funnel-shaped karst spring about 22 m deep. | 已核实 | [4] [1] |
| The water is about 9 °C year-round. | 已核实 | [4] |
| Mean discharge is about 2,300 L/s, rising above 30,000 L/s after heavy rain. | 已核实 | [4] |
| The cave system cannot currently be entered by visitors; ARGE Blautopf has held a diving permit since 1997.Permit issuer not named. | 已核实 | [1] [3] |
| The Blautopf area has been under renovation since August 2024, with access to the Blautopf maintained. | 已核实 | [2] |
| The blue colour results from sunlight: other colours are absorbed in the deep water and reflections off calcium carbonate particles intensify the blue. | 已核实 | [4] |
| Diving is limited to the research group ARGE Blautopf, which has held a diving permit since 1997. | 已核实 | [3] [1] |
已核实：来自我们直接查阅的官方或主要来源。已报告：仅来自二手来源。来源存在冲突：注释中列出两种版本。可能已过时：我们找到的最新来源已有一定年代。
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