VENN DIAGRAM (VILLALON)

VENN DIAGRAM Q4WW2 (SA) Rainfall- iniduced Sinkholes landslide Rainfall-induced landslides are one A landslide is a slipping A sinkhole is a col lapse in a flatter of the most common geological of a slope or cliff that area that causes a hole to open up hazards, occurring over a wide in the ground. This is a depression causes large amounts of in the ground that has no natural range of spatial and temporal scales rock and soil to collapse. external surface drainage. Basically, in mountainous landscapes Despite this means that when it rains, all of A form of mass the water stays inside the sinkhole considerable efforts of hazard extinction involving a prevention and risk management, and typically drains into the landslides continue to present an variety of earth subsurface. Sinkholes are caused by acute threat to life and property. It movements such as erosion. They may appear suddenly rockfalls, deep slope has been estimated that the failure, and shallow and have devastating worldwide damage of landslides debris. Landslides. A consequences. Sinkholes are that have occurred since the 20th sinkhole is a hole in the cavities in the ground that form century, have resulted in more than ground that forms when when water erodes an underlying 62,000 deaths and a loss of at least water dissolves surface rock layer. Two types of sinkholes US$9.7 billion (EM-DAT 2016). rocks. a ground that is exist. One forms when the roof of a formed by the collapse cave collapses and exposes the Effective measures to prevent of the surface layer and underground cavern Sinkholes have landslides are urgently required to both natural and artificial causes. reduce loss of life, property, and has no external They tend to occur most often in drainage. When it rains, places where water can dissolve the infrastructure. A landslide is a bedrock (especially limestone) slipping of a slope or cliff that the water. below the surface, causing overlying causes large amounts of rock and rocks to collapse. soil to collapse Difference Difference Similarities There are two types of sinkholes 1.Cover-collapsed sinkholes– develop quickly in a matter of hours and cause catastrophic damage 2.Cover-subsidence sinkholes-forms slowly overtime with the ground gradually subsiding or deflating (types of events can go unnoticed or undetected) What are the effects of landslide? 1. destroys everything and anything that comes in their path (roads, rail lanes, agricultural production, land area, etc.) 2. loss of lives (depends on the place and time of occurrence) Margielyn Villalon