Group 2

Group 2Candra Dini(02810)Nugroho Purwoko(02834)Ananto Wijanarko(02835)Ilham Romadhona(02858)

LANDSLIDE

LANDSLIDES NATURAL PHENOMENA THAT OCCUR WITH OR WITHOUT HUMAN ACTIVITY

In general definitionAlandslide is ageological phenomenonwhich includes a wide range of ground movement, such as rock falls, deep failure of slopes and shallow debris flows, which can occur in offshore, coastal and onshore environments.

The factors which influence whetherSlope angleClimateWeatheringWater contentVegetationOverloadingGeology, and slope stability.

Natural causes includeElevation of pore water pressure by saturation of slope material from either intense or prolonged rainfall and seepageVibrations caused by earthquakesUndercutting of cliffs and banks by waves or river erosionVolcanic eruptions.

Human causes include:Removal of vegetationInterference with, or changes to, natural drainageLeaking pipes such as water and sewer reticulationModification of slopes by construction of roads, railways, buildings, etcOverloading slopesMining and quarrying activitiesVibrations from heavy traffic, blasting, etcExcavation or displacement of rocks.

The characteristics of landslidesThe emergence of new springsHappen after the rain on hill or cliffIf the rainy season usually stagnant water, but toward of the disaster, the water disappear.Heard sound of rumble

The ProcessThe water seeped into the soil will add weight to the ground.If water penetrates the soil impermeable to water which acts as a handful of fields, then the ground becomes slippery.Furthermore, weathering of soil above it will move to follow the slope and exit slopes.

How to prevent landslides??Stop illegal logging !!!Stop illegal mining !!!Make Drynase or teraslandDont make a new farmland

Negative effects of landslideEconomic DeclineDamage To InfrastructureLoss Of Life

Positive effect of landslideMake fertile of landAccelerate the process of stone forge in land

Thank You. . .