High water levels and floods can occur in a variety of different forms. Lake floods often last longer, but because they have very low flow velocities they cause less destruction than overflowing rivers and carry hardly any debris. The long duration of these floods can cause significant damage to buildings, for example due to buoyancy forces.

Overflowing streams, however, exhibit high flow speed and can therefore cause enormous damage in a very short time. Streams carry large amounts of debris and can render roads impassable when they burst their banks. Because they occur suddenly, there is usually very little time to take preventive measures.

Floods caused by valley rivers display a mixture of the characteristics described above.

People are mostly only at risk when outdoors. Under certain circumstances, there can also be a risk for people inside buildings (locked rooms, floods occurring while people are asleep).


Head office St. Gallen

Egli Engineering AG
Bogenstrasse 14, 9000 St.Gallen
T +41 (0)71 274 09 09
F +41 (0)71 274 09 08

Branch office Bern

Egli Engineering AG
Schwarztorstrasse 87, 3007 Bern
T +41 (0)31 381 52 90
F +41 (0)31 381 52 91

Contact point Leysin (VD)

Egli Engineering SA
Avenue du Censuy 5b, 1020 Renens
T +41 (0)24 545 12 00

Contact point Fribourg

Egli Engineering AG
Route de la Poudrière 41,
1700 Fribourg
T +41 (0)26 526 10 09

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