The Seepegel water archive
Every lake has its own story.
A level becomes meaningful when you know where the water comes from, how the lake stores it and what happens at the outlet. This atlas connects landscape, hydrology and measurement practice without overloading live-data pages.
Lake by lake
From unregulated Alpine lakes to internationally managed border waters. Every portrait is written individually and leads directly to current measurements.
- 01
Lake Walen
A deep pre-Alpine lake that receives the Linth and passes its water on towards Lake Zurich at a gentler pace.
Read portrait → - 02
Lake Maggiore
An international Alpine lake where steep Ticino valleys meet the hydrology of the Po plain.
Read portrait → - 03
Lake Zug
An elongated pre-Alpine lake with a modest outlet and a managed water level.
Read portrait → - 04
Lake Zurich
The large store at the end of the Linth system, shaped by Alpine inflow, a major city and regulation.
Read portrait → - 05
Lake Thun
An Alpine lake with an unusually large catchment and a long history of flood management.
Read portrait → - 06
Lake Constance
A vast natural store on the Rhine: international, unregulated and strongly Alpine.
Read portrait → - 07
Lake Lucerne
A branching lake system with Alpine inflows and a historic needle weir in Lucerne.
Read portrait → - 08
Lake Geneva
The largest Alpine lake: Rhône reservoir, international boundary and immense heat store.
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Lake Sarnen
A small Alpine lake whose constrained outlet shapes floods and the history of the Sarner valley.
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Lake Hallwil
A Plateau lake in the Aabach system, with a gentle but managed level curve.
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Lake Biel
Since the Jura water correction, the Aare has flowed through Lake Biel. Its outlet is the control point for three connected lakes.
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Lake Neuchâtel
A major water store below the Jura, with deep open water, sensitive reed-lined shores and connecting canals where flow can reverse.
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Lake Murten
The smallest of the three Jura lakes connects the Broye catchment to Lake Neuchâtel. Its level also reflects water beyond its own catchment.
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Lake Greifen
An unregulatable lake in the upper Glatt valley, where inflows, outflow and water layering explain more than an assumed target level.
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Lake Pfäffikon
A regulated lake between wetlands and moraines, draining through the Aa towards Lake Greifen within a distinctive wetland landscape.
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Lake Brienz
A natural Alpine lake where the Aare and Lütschine meet, with regulation playing a particularly important role in winter.
Read portrait → - 17
Lake Joux
A natural Jura lake whose level reflects both underground water routes and hydropower management.
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Lac des Brenets
A natural border lake on the Doubs, where water leaves through both the visible outlet and the limestone below.
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Lake St. Moritz
A natural lake at the downstream end of the Upper Engadine lake chain, supplying the Inn and the Islas power station.
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Lake Lugano
Three connected basins, a narrow passage and a regulated outlet: on Lake Lugano, the measurement location matters.
Read portrait → - 21
Lake Sempach
A Lucerne lake with slow water renewal and managed flood storage for the Sure: two different timescales explain how it works.
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Redaktion & Daten
What these portraits are for
The articles separate lasting context from current readings. Hydrological facts rely on federal, cantonal and commission sources; daily values remain timestamped and sourced on the live pages.