A landslide is a geological event characterized by the movement of ground due to slope instability, triggered by factors such as groundwater pressure, erosion, and human activities like deforestation and construction. Sand boils can occur when water under pressure comes through sand, potentially leading to levee failure during floods due to piping. To mitigate sand boil issues, creating a body of water above the boil can help slow down water flow and prevent soil particle movement.

5. - A landslide or Landslip is
a geological phenomenon which
includes a wide range of ground
movement

6. HELP!!!!

8. Landslides occur when the
stability of a slope changes from a
stable to an unstable condition. A
change in the stability of a slope can
be caused by a number of factors,
acting together or alone. Natural
causes of landslides include:

9.  groundwater pressure acting to destabilize the slope.
 Loss or absence of vertical vegetative structure, soil
nutrients, and soil structure (e.g. after a wildfire).
 erosion of the toe of a slope by rivers or ocean waves.
 weakening of a slope through saturation by
snowmelt, glaciers melting, or heavy rains.
 earthquakes adding loads to barely stable slope.
 Earthquake-caused liquefaction destabilizing slopes.
 volcanic eruptions.

11. “Landslides are
aggravated by
human activities”

12.  deforestation, cultivation and construction, which
destabilize the already fragile slopes.
 vibrations from machinery or traffic.
 Blasting.
 earthwork which alters the shape of a slope, or which
imposes new loads on an existing slope
 in shallow soils, the removal of deep-
rooted vegetation that binds colluvium to bedrock.
 Construction, agricultural or forestry activities
(logging) which change the amount of water which
infiltrates the soil.

16. - Sand boils or Sand
Volcanoes occur when water under
pressure wells up through a bed of
sand. The water looks like it is "boiling"
up from the bed of sand

18. Sand boils can be a mechanism contributing
to levee failure during floods. This effect is
caused by a difference in pressure on two
sides of a levee or dike, most likely during a
flood. This process can result in piping,
whereby the removal of soil particles results in
a pipe through the embankment. The creation
of the pipe will quickly pick up pace and will
eventually result in failure of the embankment.

20. A sand boil is difficult to stop. The most
effective method is by creating a body of
water above the boil to create enough
pressure to slow the flow of water. A
slower flow will not be able to move soil
particles. The body of water is often
created with sandbags forming a ring
around the boil