Digital soil classification trough environmental covariables of the Mixteco river watershed.

Authors

  • Mario Roberto Martínez Menez Colegio de Postgraduados
  • Gerardo Colín García Colegio de Postgraduados
  • Demetrio Salvador Fernández Reynoso Colegio de Postgraduados
  • José Donaldo Ríos Berber Colegio de Postgraduados
  • Patricio Sánchez Guzmán Colegio de Postgraduados
  • Erasmo Rubio Granados Colegio de Postgraduados
  • Laura Alicia Ibáñez Castillo Universidad Autónoma Chapingo

DOI:

https://doi.org/10.28940/terra.v35i4.264

Keywords:

digital soil mapping, covariance analysis, soil units, Kappa Index, Mixteca region

Abstract

The lack of detailed maps of spatial distribution of soil units is a frequent constraint in decision-making processes, hydrological modeling, and productive assessment of an area. In this work, the Digital Soil Mapping (DSM) technique was applied, and Principal Component Analysis (PCA) was used to obtain the spatial distribution of dominant soil units in a watershed. The study area was the Mixteco watershed, which covers an area of 655 903 ha, of the Mexican state of Oaxaca. For DSM, topographic, hydrological, climatic and geological environmental covariables were used. The environmental covariables with greater impact on the spatial distribution of soil units, in order of importance, were geological, topographic and climatic. Digital classification was based on 142 randomly distributed training areas and 60 sites for validation of results. In the watershed, according to the FAO (2014) WRB Classif ication System, the following soil groups were identified satisfactorily (76.67% for overall accuracy and 71.20% for the kappa index): Cambisols (35.8%), Fluvisols (7.16%), Leptosols (48.25%), Regosols (8.00%) and Vertisols 0.79%). DSM satisfactorily determined the spatial distribution of soil units in the watershed and identified the most influential environmental covariables.

Downloads

Download data is not yet available.

Author Biographies

Mario Roberto Martínez Menez, Colegio de Postgraduados

Postgrado de Hidrociencias

Gerardo Colín García, Colegio de Postgraduados

Postgrado de Hidrociencias

Demetrio Salvador Fernández Reynoso, Colegio de Postgraduados

Postgrado de Hidrociencias

José Donaldo Ríos Berber, Colegio de Postgraduados

Postgrado de Hidrociencias

Patricio Sánchez Guzmán, Colegio de Postgraduados

Postgrado de Edafología

Laura Alicia Ibáñez Castillo, Universidad Autónoma Chapingo

Departamento de Irrigación

Published

2017-10-08

How to Cite

Martínez Menez, M. R., Colín García, G., Fernández Reynoso, D. S., Ríos Berber, J. D., Sánchez Guzmán, P., Rubio Granados, E., & Ibáñez Castillo, L. A. (2017). Digital soil classification trough environmental covariables of the Mixteco river watershed. REVISTA TERRA LATINOAMERICANA, 35(4), 281–291. https://doi.org/10.28940/terra.v35i4.264

Issue

Section

Scientific Papers

Metrics

Most read articles by the same author(s)