DRRR

• Geological Hazards - Gradual or sudden natural earth process.
• Mass movement - is the downward of surface materials caused by gravity. It could be classified as downslope movement or vertical movement.
• Ground subsidence - is an example vertical movement.
• SINKHOLE - could lead to a very slow to rapid sinking surface, usually forming a depression.
• Geology - this refers to the material of the soil or rock in the area or can be the layers of earth has weakened or stiffened in some part.
• Morphology - this refers to the structure of the land.
• Human activity - to make way for agricultural and construction, trees are needed to be cut down.
• Landslide - known as a landslip, is a geological phenomenon that includes a wide range of ground movements, such as rock falls, deep failure of slopes and shallow debris flows.
• Slides and Slumps - is a downslope movement of a rock mass occurring dominantly on defined surfaces of rapture or thin shear zone.
• Rational slides - moves along a surface of rapture that curved and concave.
• Translational slides - occurs when the failure surface is approximately flat or slightly undulated.
• Flow - is a type of landslide involving the movement of material down slope in fluid form.
• Debris Avalanche - downslope movement and soil with extremely rapid velocity.
• Creep - is a relatively less dangerous mass movement involving the slow downslope movement of soil and weak rocks on the surface.
• Subsidence - is the slow lowering of the land surface due to excessive extraction of water form the ground.
• Blue holes - are water filled sinkholes located in the ocean.
• Solution sinkholes - are common in areas that have thin cover of soil on the surface of the ground which exposes the bedrock to water erosion.
• Cover Subsidence sinkholes - this occur when the bedrock is covered by soil and materials that are not well-knitted together.
• Cover collapse sinkhole - occur when the bedrock is covered by a deep layer of soil and earth.
• Karst topography - a landscape that is characterized by the dissolution of rocks by acidic groundwater.