Landslide and avalanche are forms of natural disasters that occurs due to natural processes of the Earth such as movement of rock or snow down a slope. The movement of rock, debris or earth down a slope is called a landslide. Landslide usually occurs when the materials which make up the hill slope fail to hold on or due to the force of gravity. Landslides can also be referred to as slope failure, landslip or slumps. The most common types of landslides that occur are earth slides, rock falls and debris flow landslide.
• Aerial Island’s entire source of agriculture is located within Zone A, with the highest risk of being destroyed by the eruption. If not already destroyed, acid rain (caused by sulphur dioxide) can affect crops directly and reduce yields from agriculture. Livestock and other animals will be killed by lava, pyroclastic flows and gases. • Lahars are mudflows flowing at very fast speed. When moving, it resembles a mass of wet concrete carrying rock debris.
Watersheds or flood are more common in spring, when snow and heavy rain falling. Afghanistan is located in high seismic zone because Afghanistan is a mountainous country and has a rural location. In the cities and some villages when an earthquake, landslide, mudslide, avalanches or flood occur, is always deadly and destructive. According to estimates since 2002 the natural disasters
Most importantly, landslides can result to huge damage and loss of life There are many different causes which can result to a disastrous landslides. Both natural factor and man-made factor could trigger to the occurrence of a landslide. Naturally, a prolonged, heavy rainfall is the main cause as to why landslides happen. If a slope is saturated and lubricated from the rainwater, there will be less friction to overcome, resulting the slope to collapse. Natural events such as earthquake and volcanic eruption ensue landslide to happen simply from dislodged materials and earthquake tremors.The occurrence of earthquakes in steep
He died while trying to get closer to the Mount Vesuvius that was erupting. Pliny the Younger described the eruption in a letter. The explosion includes all the problems that can follow an eruption: debris, lava, landslides, pyroclastic flows (very hot gases and fragments of rocks that rush down, destroying all in its path), enormous plumes of ash and even lahars (slides of mud created because of rain or molten snow that can also destroy huge areas). One of these eruptions
Landslides were reported to have been triggered by seasonally high rainfall (e.g., Lulseged Ayalew, 1999; Kifle Woldearegay, 2013) and associated slope steepening and instability induced by active river incision (Nyssen et al., 2002). Furthermore, slope instabilities caused by human impact were also reported within the context of the country’s socio-economic development of the country (Nyssen et al., 2003). Other less important factors include seismicity related to active faulting in the main Ethiopian rift and the Afar triangle (Ayele, A., Arvidsson, R.,
Earthquakes’ effects range from many aspects, one of which is in terms of environment. Tsunamis and landslides are the frontrunner effects of earthquakes. Tsunamis are a series of water waves caused when the seafloor moves vertically in an earthquake. When an earthquake reached coastlines up to the land of the sea, there is an up rise level of water from these bodies of water causing damages when it overflows to the city. Landslides are generated due to direct rupture and sustained shaking especially in unstable slopes on mountains.
Because these services are necessary for important emergency services and are critical for survival, the loss of utility systems can have calamitous consequences for a community trying to recover after a seismic event. Relevant networks such as the water, electricity, communication and transportation systems are often called lifelines; unfortunately, lifeline elements and infrastructures are inherently complex, and like most man-made constructions, often prone to seismic events. Damage to lifeline networks in the past earthquakes in Iran (such as Bam earthquake (2003), Manjil-Rudbar earthquake (1990)), also all around the world (such as Japan Kanto Earthquake (1923), Alaska, USA (1964),
In major land masses, they often result to landslides and volcanic eruptions. Earthquakes occurring under water may result to tsunamis. In urban areas, they cause collapse of buildings. The Philippines is very prone to seismic events because it lies along the Pacific Ring of Fire. This dangerous zone in the Pacificconsists of plates that can be likened to a jigsaw puzzle.
Natural disaster like typhoons and storms is very common in the Philippines. It causes storm surge along coasts and trigger landslide and flash flood in the mountains. A number of typhoons or storms hit the Country every year especially in Cagayan de Oro and it affects enormous quantity of people in the country. Flash flood is a perfect and a common outcome and issue when sudden storm unleash a torrential down fall or heavy rainfall occurs, runoff moves with a surprising force. The Center for Research on the Epidemiology of Disasters (CRED) described a flood as “a significant rise of water level in a stream, lake, reservoir or coastal region”.