How does the agents of gradation affect the rate of degradation and aggradation?
Answers
Answer:
In geology, degradation refers to the lowering of a fluvial surface, such as a stream bed or floodplain, through erosional processes
eFfEct on dEgRadation
Ballast degradation or fouling often associated with deteriorating railroad track performance refers to the condition of a new ballast layer changing its aggregate particle size and shape properties with usage. Fouling is mainly due to degradation or breakage of ballast aggregates under traffic loading, although other fine materials intruding can also contaminate a clean and uniformly graded ballast layer. Previous research efforts have focused on studying the degraded ballast behavior of clean ballast aggregates mixed with finer materials such as sand, mineral filler, subgrade clay, and coal dust. However, this approach cannot fully represent the cases where fouled ballast composition is made up of aggregate particle breakdown or intrusion of foreign materials.
effect on aggradation
Aggradation can be caused by changes in climate, land use, and geologic activity, such as volcanic eruption, earthquakes, and faulting. For example, volcanic eruptions may lead to rivers carrying more sediment than the flow can transport: this leads to the burial of the old channel and its floodplain.
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