Criteria
for defining "potentially dangerous or critical lakes"
1. Large lake size and rapid growth in area
2. Increase in lake water level
3. Activity of supra glacial lakes at different times
4. Position of the lakes in relation to moraines and
associated glacier
5. Dam condition
i)
Narrow crest
area
ii)
No drainage
outflow
iii)
Steepness of
slope of the moraine walls
iv)
Existence and
stability of ice care
v)
Height of
moraine
vi)
Mass movement or
potential mass movement
vii)
seepage through
the moraine walls
6. Glacier condition
i)
Condition of associated
glacier
ii)
Hanging glacier
in contact with lake.
iii)
Large glacier
area
iv)
Rapid glacier
Retreat
v)
Debris cover on
the lower glacier tongue
vi)
Gradient of
glacier tongue
vii)
Toppling/Collapsing
of ice
viii)
ICE blocks
draining to lake
7.
Physical
conditions of Surroundings
i)
Potential
rock fall/Slide (mass movement)
ii)
Large
snow avalanche sites immediate are the lake.
iii)
Neo-tectonic
and earthquake activities around or near the lake.
iv)
Climatic
conditions (large inter annual variations)
v)
Very
recent moraines of tributary glaciers
vi)
Have
main glacier with well - developed frontal lake.
