Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Discrimination of different sub-basins on Tajo River based on water influence factor.
Year:2012
Research Areas
  • Mathematics,
  • Natural sciences and health sciences,
  • Agriculture
Information
Abstract
The SOM algorithm and numerical taxonomy has been applied to classify the Tajo hydrographic basin (Spain) till Portugal border. A total of 52 stations have collected data. 15 variables of water have been used in this study: flow (m3/sec), pH, electrical conductivity, concentration of several cations and anions (mgr/l) such as Cl-, SO4=, alkalinity (CO3H-, CO3=, OH-), Ca2+, Mg2+, Na+ and K+. The analysis proceeds in two different lines. First, the Kohonen algorithm is trained using as input the corresponding mean each of the variables for each station. This will allow us to establish different clusters characterized in terms of the variables and other auxiliary variables before that referred to us the help we understand and explain the construction of the groups. Second, a new Kohonen network will be trained using as inputs averages of the latent variables or factors obtained after carrying out factor analysis on all available data. Different groups were obtained by applying a Euclidean distance between stations (distance classification) and a Euclidean distance between each station and the estimated centre of gravity between them (centroid classification), varying the number of parameters and with or without standardized variable.
International
Si
Congress
E.G.U. 2012 9th General Assembly.
960
Place
Viena, Austria
Reviewers
Si
ISBN/ISSN
1029-7006
Start Date
22/04/2012
End Date
27/04/2012
From page
1
To page
1
Geophysical Research Abstracts Vol. 14
Participants
  • Autor: R. Bermudez
  • Autor: A. Marcado Cerdeño
  • Autor: Ana Maria Tarquis Alfonso (UPM)
  • Autor: Diego Andina De la Fuente (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Grupo de Automatización en Señal y Comunicaciones (GASC)
  • Departamento: Señales, Sistemas y Radiocomunicaciones
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