Term
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Definition
| downslope movement of rock, sediment and soil under the direct influence of gravity |
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Term
| Controls and Triggers of Mass Wasting |
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Definition
1. Water
2. Oversteepened Slopes
3. Removal of Vegetation
4. Slope Composition
5. Natural Triggers
6. Landslides without triggers
7. Human-Induced Triggers |
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Term
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Definition
| excessive amounts can cause stable slopes to fail. |
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Term
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Definition
| Slopes may be steepened by: erosion by rivers or waves; human activity; tectonic folding,faulting or tilting |
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Term
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Definition
1.solid bedrock is more stable
2.unconsolidated material remains stable until slope exceeds angle of repose |
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Term
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Definition
| torrential rain, earthquakes, volcanic eruptions |
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Term
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Definition
| mismanagement of water, clear cutting, development,mining |
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Term
| Classification of Mass Wasting Processes |
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Definition
1. Type of Material
2. Type of Motion
3. Rate of Movement |
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Term
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Definition
1.unconsolidated material–“debris..., mud..., earth...”
2.bedrock–“rock...” |
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Term
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Definition
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Term
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Definition
| freefall of material through air (steep slopes) |
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Term
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Definition
| movement of material along a surface |
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Term
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Definition
| material moves downslope as a fluid |
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Term
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Definition
1.Slow mass wasting
2.Rapid mass wasting |
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Term
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Definition
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Term
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Definition
| movement of loose material over a layer of permafrost |
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Term
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Definition
| (mm or cm per year) caused by expansion / contraction of loose sediment due to wetting and drying or freezing and thawing |
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Term
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Definition
1. Fall
2. Slide
3. Slump
4. Flow
5. Rock Avalanche |
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Term
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Definition
| rock or sediment breaks free from a steep or vertical slope and falls (through the air) to the ground below |
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Term
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Definition
| a single intact mass of rock, soil, or unconsolidated material detaches and moves downward along a slip plane. |
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Term
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Definition
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Term
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Definition
| movement of rock of regolith as a unit along a curved surface |
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Term
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Definition
| fluid movement or rock fragments / soil |
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Term
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Definition
1.Earthflow
2.Debris Flow and mudflow |
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Term
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Definition
| rapid movement of sediment and water in stream channels,usually in semiarid, mountainous regions |
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Term
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Definition
| usually form on hillsides in wet climates when water saturates the soil |
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Term
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Definition
1.swift and dangerous(tens-hundreds of Km/hour).
2.Occurs on steep slopes.
3.Huge volume of material detaches, crashes to the ground and continues at high velocity downslope.
4.May move on cushion of compressed air |
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