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The geographic cycle, or cycle of erosion, is an idealized model that explains the development of relief in landscapes. [1] The model starts with the erosion that follows uplift of land above a base level and ends, if conditions allow, in the formation of a peneplain . [ 1 ]
This model show that when ∇z is far from S c it behaves like equation 1. On the contrary when ∇z approaches S c erosion rates becomes extremely high. This last feature may represent the behavior of landslides in steep terrain. [7] At low erosion rates increased stream or river incision may make gentle slopes
Denudation chronology revolves around episodes of landscape-wide erosion, better known as denudation. The cycle of erosion model is a common approach used to establish denudation chronologies. [ 1 ]
While surprising given the centuries of observation of fluvial and pluvial erosion, this is more understandable given early geomorphology was largely developed in Britain, where the effects of coastal erosion are more evident and play a larger role in geomorphic processes. [9] There was more evidence against marine planation than there was for it.
The inherent difficulties of the model have instead made geomorphological research to advance along other lines. [46] In contrast to its disputed status in geomorphology, the cycle of erosion model is a common approach used to establish denudation chronologies, and is thus an important concept in the science of historical geology. [48]
But because of the complexity of soil erosion and its constituent processes, all erosion models can only roughly approximate actual erosion rates when validated i.e. when model predictions are compared with real-world measurements of erosion. [108] [109] Thus new soil erosion models continue to be developed. Some of these remain USLE-based, e.g ...
Some models focus on long-term (natural or geological) erosion, as a component of landscape evolution. However, many erosion models were developed to quantify the effects of accelerated soil erosion i.e. soil erosion as influenced by human activity. Most soil erosion models consider only soil erosion by water, however a few aim to predict wind ...
Cycle of erosion – Model of geographic landscape evolution; Inselberg – Isolated, steep rock hill on relatively flat terrain; Seamount – Mountain rising from the ocean seafloor that does not reach to the water's surface