The Effect of Aspect on Landslide and Its Relationship with Other Parameters

Abstract

Aspect is one of the parameters used in the preparation of landslide susceptibility maps. The procedure of this easily accessible and conclusive parameter is still a matter of debate in the literature. Each landslide area has its own morphological structure, so it is not possible to make a generalization for the aspect. In other words, there is no aspect in which landslides develop in particular. Generally, landslides occur in areas facing more than one direction. The biggest reason for this is that those areas are under the influence of other parameters. Therefore, it is wrong to evaluate the aspect, alone. Since it is a part of the system, it should be evaluated together with other conditioning factors. In this research, many landslides susceptibility studies have been investigated. The directions and causes of landslides have been determined from the studies. In addition, the criteria of the used aspect classes have been investigated. In the literature, the number of class intervals chosen, and their reasons were investigated, and the effects of this parameter were tried to be revealed in new sensitivity studies.

High resolution landslide susceptibility mapping using ensemble machine learning and geospatial big data

“…The aspect shows the slope direction and is an essential and complex variable for landslide susceptibility. Aspect is also closely related to climatic conditions especially the variations in solar radiation, soil moisture, and temperature distribution which impact the occurrence of landslides (Cellek, 2021). Since 0 o aspect and 360 o aspect are identical, the numerical values of the aspect do not accurately depict the aspect value.…”

Co-seismic and rainfall triggered landslide hazard susceptibility framework for Uganda derived using fuzzy logic and geospatial modelling techniques

“…In landslide hazard zonation, slope orientation with respect to the North may be considered as a vital parameter (Kanungo et al, 2009;Nagarajan et al, 1998;Saha et al, 2002). This is because the effect of soil moisture content, air dryness and solar heating are determined by the slope aspect influence (Capitani et al, 2013;Cellek, 2021;Yalcin, 2008). Slope aspect can be classified in several ways depending on the purpose at hand (Bourenane et al, 2015;Caniani et al, 2008;Tangestani, 2004).…”

Application of bivariate statistical techniques for landslide susceptibility mapping: A case study in Kaghan Valley, NW Pakistan

“…Rather the abundance of landslide occurrence belongs to the areas which are facing more than one direction. Aspect is aided with other parameters which influence the landslide concentration in an area (Cellek, 2021). Particularly for the Himalayan terrain, (Dimri et al, 2007; Srivastava et al, 2010), declared south‐facing slopes as more vulnerable to landslides because of less vegetation due to low retention of soil moisture.…”