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GLACIORISK EUROPEAN PROJECT
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France (CEMAGREF,
ETNA,
ONF-RTM,
LGGE-CNRS), Italy (CNR-IRPI,
SMS/Nimbus), Norway (UOSLO,
NVE),
Iceland (UI
(IS)), Austria (DGGS),
Switzerland (VAW-ETHZ) |
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GLACIER "MER DE GLACE"
Risk type: glacier flood (contain both lakes and water pocket)
Glacier list |
Statistics
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| Type: |
Valley glacier |
| Country: |
France |
| Region: |
Haute Savoie |
| Massif/Ice Cap: |
Mont Blanc |
| Municipality: |
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| Municipality code: |
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| Location: |
The « Mer de Glace » is the biggest glacial display of France (~40 km²); it is composed of several glaciers. But here , the term " Mer de Glace " means only the terminal tongue of this big glacier |
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| Latitude (°, cent): |
45.55 N |
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| Longitude (°, cent): |
6.55 E |
| Surface (km2): |
3.5 |
| Lenght (km): |
4.7 |
| Width (km): |
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| Min. altitude (m): |
1400 |
| Max. altitude (m): |
2200 |
| Orientation (°) |
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| Slope (°) |
9 |
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EVENT: Date
25/7/1969
- Date quality: |
 |
| Type: |
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 |
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| Description |
a sudden flood of the Arveyron; a break of a little dam caused by a collapsing on the left bank, the cause is an under glacial water pocket outburst , localised at the confluence of "Mer de Glace" with "Nant Blanc" |
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Effects: |
the flood was avoided thanks to the Arveyrons dyke |
| Deaths(#) |
0 |
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Injuried (#) |
0 |
| Note |
The information in relation with these events are reduced to the consequences on downstream. This very phenomenon is not detailed, we don’t know the volume of water , neither how long these episodes last |
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DAMAGES |
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BIBLIOGRAPHY |
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EVENT: Date
25/9/1920
- Date quality: |
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| Type: |
Glacier flood (contain both lakes and water pocket) |
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| Description |
after violent precipitations (56 mm since the 17th September), a water pocket outburst occured, with thrusting of ice |
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Effects: |
a violent flood of Arveyron, also a flood of many cellars and ground-levels in Chamonix (1,5 m of water on 4 ha at the "Bois du Bouchet" ). Some ice blocs of 1m3 were fond as far as Annemasse, 70 km on downstream |
| Deaths(#) |
0 |
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Injuried (#) |
0 |
| Note |
The information in relation with these events are reduced to the consequences on downstream. This very phenomenon is not detailed, we don’t know the volume of water , neither how long these episodes last |
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DAMAGES |
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BIBLIOGRAPHY |
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EVENT: Date
16/8/1878
- Date quality: |
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| Type: |
Glacier flood (contain both lakes and water pocket) |
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| Description |
a water pocket outburst occurred |
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Effects: |
a flood of the Arveyron lead to turn tail for the inhabitants. The fields and one house were flooded |
| Deaths(#) |
0 |
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Injuried (#) |
0 |
| Note |
the information in relation with these events are reduced to the consequences on downstream. This very phenomenon is not detailed, we don’t know the volume of water , neither how long these episodes last |
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DAMAGES |
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| Type: |
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Description: |
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BIBLIOGRAPHY |
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Mougin, M.P, 1922 - Avalanches, débâcles et érosions glaciaires Etudes glaciologiques, tome V, Imprimerie nationale, Paris, p167 et 172 |
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Vivian, R., 1975 - Les glaciers des Alpes occidentales Thèse d'état, Imprimerie Allier, Grenoble, p.349 |
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