why landslide happen?
90253
A landslide is defined as, the movement of a mass of rock, debris, or earth down a slope. Landslides are a type of “mass wasting” which denotes any down slope movement of soil and rock under the direct influence of gravity. The term “landslide” encompasses events such as rock falls, topples, slides, spreads, and flows . Landslides can be initiated by rainfall, earthquakes, volcanic activity, changes in groundwater, disturbance and change of a slope by man-made construction activities, or any combination of these factors. Landslides can also occur underwater, causing tidal waves and damage to coastal areas. These landslides are called submarine landslides.
644944
Where would you fall to?  Falling is the result of the gravity of a large object pulling you.  The bigger the object the more the gravity.  The Earth is large, so if you climb out under an overhanging cliff and turn loose you fall down to the big thing, which in this case is the Earth.  If the Earth were flat and you walked to the edge, you wouldn't fall off.  You'd just be able to sort of "balance" on the edge until you stepped to the other side (or back to the side you were on originally).  Due to the force of gravity, most heavenly bodies are round or eventually become so over time.
48406
An additional cause of the skidding mentoned in the first answer is "hydroplaning". This is the same phenomenon that holds a water-skier up; it's the inertia of the layer of water that resists rapid displacement under the pressure of the object on top.\nSince you mentioned that it's at night, there are three other physical effects that come into play to reduce the safety margin. First, the view of the road is distorted by water hitting the windshield, which has varying thickness and refracts the incoming light in erratic ways. Second, the wet pavement is often less visible, due to the fact that most of the light you see by comes from your direction (your headlights) and is backscattered less by the water layer than it would be by the dry pavement. Third, vision is further hindered by the water's reflection of the headlights of oncoming traffic.
308644
the best example for your answer is travel/cargo industry.if coz of heavy rains/earthquakes road&rail system damages, it seriously affects the industry.where the prices of the commodities increase which cargoed by these carriers...consequently economic conditions change....hope that clarifies your q ;)
36711
Flash floods occur whenever water enters into an area faster than it can be absorbed or drained.\n\nSometimes flash floods occur far away from where the actual rain falls, for example up river, and so can truly cause inhabitants to be surprised.
162158
Yes, it's common for raindrops to collide after they start to fall. The more wind there is the more collisions are likely.
144875
That was in the island of Leyte, which has been experiencing a lot of landslides for the past ten years due to deforestation. Its a terrible sight. Very tragic. They're still looking for people buried under the earth.
81492
On coasts with sloping shorelines, waves crash against the land, eroding some of the material it's made of. If you look carefully, you may see a notch cut into the shore by waves at the back of the beach. Removing the supporting rock or sediment weakens the material above it. Landslides tumble onto the beach, especially after a storm. See sources below
1037668
island girl is not totally correct. earthquakes occur when two plates fault, as in one plate goes up and the other goes down, thus making vibration and it is released in P-waves. \ncold air is denser than warm air. cold air goes under the warm air and makes it rise into the sky, this produces condensation. clouds form and inside these clouds are either condensation nuclei or rain nuclei (not sure of the name) when these nuclei finally fuse together they get heavy and form into a rain drop, there are millions of nuclei in a raindrop, so they get to heavy and they fall and depending on temperature, they can freeze and turn into snow or hail. sleet is just a liquidy kind of snow that forms on the ground. snow and water in one. i hope i answered your question and its udnerstandable.
373466
They don't. They can happen anytime. Cyclones or hurricanes last for several days and may arrive at a place in the day or night. Earthquakes can happen when the plates in the earth move. The Indian Ocean earthquake that caused the Boxing Day 2004 tsunami happened around 8.00 am in local time. Mudslides occur after heavy rain or snow,
59198
Mudslides(flows can be helped and are caused from \nlack of plants,roots ,brush,trees ect on the sides of hills.With the escavation and creation of new\nhousing ect and for the clean hillside look.The\nimportance of the undergrowth of grass ,trees ect \nhave been depleted and not replaced.They have \nprograms for beaches and hillsides,even in foreign\ncountries that realise the importance of root and plant systems in hillside lands.The winding and \nweb patterned root systems of these plants,trees\nacts like a "net" and the plants themselves and erosion barrier.
561205
D. Fissure eruptions\nand it also happens mostly under water.
758624
What causes erosion to be severe in some areas and minor elsewhere is a combination of many factors, including the amount and intensity of precipitation, the texture of the soil, the gradient of the slope, ground cover (from vegetation, rocks, etc.) and land use. The first factor, rain, is the agent for erosion, but the degree of erosion is governed by other factors.\n\nThe first three factors can remain fairly constant over time. In general, given the same kind of vegetative cover, you expect areas with high-intensity precipitation, sandy or silty soils and steep slopes to be the most erosive. Soils with a greater proportion of clay that receive less intense precipitation and are on gentle slopes tend to erode less. But here, the impact of atmospheric sodium on erodibility of clay should be considered.\n\nThe factor that is most subject to change is the amount and type of ground cover. When fires burn an area or when vegetation is removed as part of timber operations or building a house or a road, the susceptibility of the soil to erosion is greatly increased.\n\nRoads are especially likely to cause increased rates of erosion because, in addition to removing ground cover, they can significantly change drainage patterns. A road that has a lot of rock and one that is "hydrologically invisible" (that gets the water off the road as quickly as possible, mimicking natural drainage patterns) has the best chance of not causing increased erosion.\n\nUnderstandably, many human activities remove vegetation from an area, making the soil easily eroded. Logging and heavy grazing can reduce vegetation enough to increase erosion. Changes in the kind of vegetation in an area can also effect erosion rates. Different kinds of vegetation effect infiltration rates of rain into the soil. Forested areas have higher infiltration rates, so precipitation will result in less surface runoff, which erodes. Instead much of the water will go in subsurface flows, which are generally less erosive. Leaf litter and low shrubs are an important part of the high infiltration rates of forested systems, the removal of which can increase erosion rates. Leaf litter also shelters the soil from the impact of falling raindrops, which is a significant agent of erosion. Vegetation can also change the speed of surface runoff flows, so grasses and shrubs can also be instrumental in this aspect.\n\nOne of the main causes of erosive soil loss in the year 2006 is the result of slash and burn treatment of tropical forests. When the total ground surface is stripped of vegetation and then seared of all living organisms, the upper soils are vulnerable to both wind and water erosion. In a number of regions of the earth, entire sectors of a country have been rendered unproductive. For example, on the Madagascar high central plateau, comprising approximately ten percent of that country's land area, virtually the entire landscape is sterile of vegetation, with gully erosive furrows typically in excess of 50 meters deep and one kilometer wide. Shifting cultivation is a farming system which sometimes incorporates the slash and burn method in some regions of the world.\n\nWhen land is overused by animal activities (including humans), there can be mechanical erosion and also removal of vegetation leading to erosion. In the case of the animal kingdom, this effect would become material primarily with very large animal herds stampeding such as the Blue Wildebeest on the Serengeti plain. Even in this case there are broader material benefits to the ecosystem, such as continuing the survival of grasslands, that are indigenous to this region. This effect may be viewed as anomalous or a problem only when there is a significant imbalance or overpopulation of one species.\n\nIn the case of human use, the effects are also generally linked to overpopulation. For when large numbers of hikers use trails or extensive off road vehicle use occurs, erosive effects often follow, arising from v
158817
Several ways. This also depends on the type of eruption. Often earthquakes occur before, or during an eruption causing things to topple. Also, often the size of the volcano itself changes. Lava cools to rock after flowing over the landscape, and kills the organic material it comes into contact with. The gas released during an eruption is also deadly! If it is an eruption like Mt. St. Helens was, the land is covered in ash and decimated by mudslides.
229084
because there are lots of kinds of mass movement\nthere are landslides, creep, rock falls and avalanches. \ntranslational slides are used for landslides, while rotational are used for rock movement, especially boulders, blocks
311505
It happens to all.\nIt may be the environment, situation and problems around you.\nWhatever may be, try to be happier and brisk always...all the best
960225
An avalanche can happen with just a foot of snow (even less) if it's on top of snow that has already iced over.\nMuch more to it than amount.