As a special flood phenomenon, mountain torrents have
different motion and dynamic characteristics than
ordinary floods. Rainstorm and mountain flood have
the characteristics of fast current velocity, high
sediment content, large destructive power, steep
water potential, and short duration.
The motion characteristics of mountain torrents
Mountain torrents occur in smaller basins. Under the
impact of strong rainstorm, water converges fleetly
and forms mountain torrents, reaching the highest
water level quickly. The rising time of the flood
is shorter than the falling time; the maximum flow
velocity is basically the same as the time of the
highest water level, and the flow velocity when
rising is greater than that of the falling. The
loop curve is presented on the water level flow
chart. There are typical figures of mountain
flood flow process line and water level and
Avoid the risk of mountain flood
Mountain torrent is sudden floods in a gully.
It has the characteristics of sudden, concentrated, and destructive
and so on. Therefore, once you are in a mountainous area, do not panic
and try to listen to command of experienced people, immediately
looking for higher ground to avoid disaster. Run away in the direction
of ridge and don’t avoid the flood under dangerous rocks and unstable
boulders. Do not linger in the valley, for the valley is
the path of the mountain torrents.
When you meet the mountain floods, you need to do the following:
Be sure to keep calm and move quickly to the mountains or highlands;
if it can't be transferred for a moment, choose a relatively safe place
at the same time while observing the environment behind it.
When a flash flood occurs, do not run down the hillside slope or
the valley exit. Choose a near safe route to run along the hillside.
Mountain torrents are swift and violent, with high speed and fast
speed. Do not cross the river lightly.
When trapped by mountain torrents, it is necessary to get in
touch with the flood prevention department of the local government
immediately and seek assistance. We must listen to the arrangement
of the personnel concerned, and at the same time, in case of
emergency, we should learn to send out distress signals, such
as shouting for help or shaking clothes.