Resumo

ALVAREZ-OLGUIN, G; HOTAIT-SALAS, N  e  SUSTAITA-RIVERA, F. Identification of Homogeneous Hydrological Regions through Multivariate Analysis. Ing. invest. y tecnol. [online]. 2011, vol.12, n.3, pp.277-284. ISSN 2594-0732.

Hydrological regionalization is used to transfer information from gauged catchments to ungauged river basins. However, to obtain reliable results, the basins involved must have a similar hydrological behavior. The objective of this research was to identify hydrologically homogeneous regions in the Mixteca Oaxaqueña and surrounding areas. The area of study included 17 basins for which 20 climate and physiographic variables potentially useful in the prediction of flow were quantified. The applications of multivariate statistics techniques allowed us to identify three groups of basins hydrologically associated. A regional model was obtained to predict mean annual flow, which determined that the best predictive variables are the area and the average annual precipitation. The results will serve in future research to assess the availability of surface water in the region.

Palavras-chave : hydrological regionalization; Mixteca Oaxaqueña; Andrews'curves; cluster analysis; estimation of flow; ungauged catchment.

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