Minds Are Open Only When Hearts Are Open
SST PROJECT
TOPIC: LANDSLIDE
ACKNOWLEDGEMENTS
We would like to express our special thanks of gratitude to our teacher ,MRS. Rajashri Behera, who gave us the golden opportunity to do this wonderful project on the topic –LANDSLIDE. It also helped in doing a lot of research and we came to know about various types of new things. We would also like to thank our parents who helped us a lot in this project. There should also be a special thanks to our group members who cooperated in all the activities and group discussions and worked with harmony.
♥DEFINATION OF LANDSLIDES ♥THE CAUSES OF LANDSLIDES. ♥TYPES OF LANDSLIDES. ♥EFFECTS OF LANDSLIDES ♥PREDICTION OF LANDSLIDES.
Landslides occur when the stability of 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: •Groundwater (porewater) 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 destroying slopes. •Liquefaction is a phenomenon in which the strength and stiffness of a soil is reduced by earthquake shaking or other rapid loading. Liquefaction and related phenomena have been responsible for tremendous amounts of damage in historical earthquakes and landslides around the world. Liquefaction occurs in saturated soils, that is, soils in which the space between individual particles is completely filled with water.
Debris flow
Slope material that becomes saturated with water may develop into a debris flow or mud flow. The resulting slurry of rock and mud may pick up trees, houses and cars, thus blocking bridges and tributaries causing flooding
TOPIC: LANDSLIDE
ACKNOWLEDGEMENTS
We would like to express our special thanks of gratitude to our teacher ,MRS. Rajashri Behera, who gave us the golden opportunity to do this wonderful project on the topic –LANDSLIDE. It also helped in doing a lot of research and we came to know about various types of new things. We would also like to thank our parents who helped us a lot in this project. There should also be a special thanks to our group members who cooperated in all the activities and group discussions and worked with harmony.
♥DEFINATION OF LANDSLIDES ♥THE CAUSES OF LANDSLIDES. ♥TYPES OF LANDSLIDES. ♥EFFECTS OF LANDSLIDES ♥PREDICTION OF LANDSLIDES.
Landslides occur when the stability of 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: •Groundwater (porewater) 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 destroying slopes. •Liquefaction is a phenomenon in which the strength and stiffness of a soil is reduced by earthquake shaking or other rapid loading. Liquefaction and related phenomena have been responsible for tremendous amounts of damage in historical earthquakes and landslides around the world. Liquefaction occurs in saturated soils, that is, soils in which the space between individual particles is completely filled with water.
Debris flow
Slope material that becomes saturated with water may develop into a debris flow or mud flow. The resulting slurry of rock and mud may pick up trees, houses and cars, thus blocking bridges and tributaries causing flooding