Surface fitting in geomorphology - examples for regular-shaped volcanic landforms

Yepes Temiño, Jorge; Favalli, A.; Karátson, D. y Nannipieri, L. (2014). Surface fitting in geomorphology - examples for regular-shaped volcanic landforms. "Geomorphology", v. null (n. 221); pp. 139-149. ISSN 0169-555X. https://doi.org/10.1016/j.geomorph.2014.06.009.

Descripción

Título: Surface fitting in geomorphology - examples for regular-shaped volcanic landforms
Autor/es:
  • Yepes Temiño, Jorge
  • Favalli, A.
  • Karátson, D.
  • Nannipieri, L.
Tipo de Documento: Artículo
Título de Revista/Publicación: Geomorphology
Fecha: 2014
Volumen: null
Materias:
Escuela: E.T.S.I. de Minas y Energía (UPM)
Departamento: Ingeniería Geológica y Minera
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

In nature, several types of landforms have simple shapes: as they evolve they tend to take on an ideal, simple geometric form such as a cone, an ellipsoid or a paraboloid. Volcanic landforms are possibly the best examples of this ?ideal? geometry, since they develop as regular surface features due to the point-like (circular) or fissure-like (linear) manifestation of volcanic activity. In this paper, we present a geomorphometric method of fitting the ?ideal? surface onto the real surface of regular-shaped volcanoes through a number of case studies (Mt. Mayon, Mt. Somma, Mt. Semeru, and Mt. Cameroon). Volcanoes with circular, as well as elliptical, symmetry are addressed. For the best surface fit, we use the minimization library MINUIT which is made freely available by the CERN (European Organization for Nuclear Research). This library enables us to handle all the available surface data (every point of the digital elevation model) in a one-step, half-automated way regardless of the size of the dataset, and to consider simultaneously all the relevant parameters of the selected problem, such as the position of the center of the edifice, apex height, and cone slope, thanks to the highly performing adopted procedure. Fitting the geometric surface, along with calculating the related error, demonstrates the twofold advantage of the method. Firstly, we can determine quantitatively to what extent a given volcanic landform is regular, i.e. how much it follows an expected regular shape. Deviations from the ideal shape due to degradation (e.g. sector collapse and normal erosion) can be used in erosion rate calculations. Secondly, if we have a degraded volcanic landform, whose geometry is not clear, this method of surface fitting reconstructs the original shape with the maximum precision. Obviously, in addition to volcanic landforms, this method is also capable of constraining the shapes of other regular surface features such as aeolian, glacial or periglacial landforms.

Más información

ID de Registro: 35574
Identificador DC: http://oa.upm.es/35574/
Identificador OAI: oai:oa.upm.es:35574
Identificador DOI: 10.1016/j.geomorph.2014.06.009
URL Oficial: http://www.sciencedirect.com/science/article/pii/S0169555X14003092
Depositado por: Memoria Investigacion
Depositado el: 16 Jun 2015 06:39
Ultima Modificación: 16 Jun 2015 06:39
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