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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Sediment management and morphodynamics : Correlation between soil erosion by water and degradation, retrogradation phenomena
Correlation between soil erosion by water and degradation, retrogradation phenomena
Author : GIUSEPPE C. FREGA (1), MARIO FALACE (2) & FRANCESCO LAMONACA (3)
ABSTRACT
Soil erosion varies greatly over space and neglecting information about estimation uncertainty may lead to inappropriate
decision-making. Spatially distributed models coupled with Geographic Information System and a geo-statistical approach
allow to identify areas sensitive of soil loss and carry out a good representation of the erosion process. Slope instability is
correlated to landslide generation in soil retrogradation and degradation process.
The objective of this paper is to carry out and validate correlation between soil erosion process and slope instability,
degradation and retrogradation phenomena, and to propose a procedure that allows mapping the areas more prone to risk
erosion and happening landslide generation in soil retrogradation and degradation process from the proposed correlation.
Using a graphic calculation, based on LabView tool, from the proposed correlation is possible to previously localize and
mapping the areas more prone to soil erosion phenomena. So using the proposed approach it's possible to previously
identify the areas that could be interest from intense erosive phenomena.
The first results show as the proposed procedure identifies the foot of the registered landslide and other areas interested
by this phenomena, with an accuracy that allow urban planning as a decision making support. From the body to the crown
of the landslide, the model prediction is less accurate. It is due to the fact that the landslide generation happened by
retrogradation phenomena. By the first fall, the slope equilibrium become precarious, so it 's realize slope instability
conditions and it starts a trigger effect in case of aggressive rainfall or earthquakes, which begin the landslide phenomena
by retrogradation. An important future development of these studies can be the mapping with accuracy and precision of
the total area interested in these phenomena using the equilibrium slope models coupled with the proposed approach.
File Size : 1,559,800 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Sediment management and morphodynamics
Date Published : 28/08/2015
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