Validación del método de Número de Curva en tres microcuencas aportantes del Río Pisque en Ecuador

Hillary Rengifo; Renato Haro; Jorge Espinosa Marín; Wllintong Bastidas; John  Ramirez Avila; Javier Osorio

doi:10.21138/GF.848

Validation of the Curve Number method in three tributary sub-watersheds of the Pisque River in Ecuador

Authors

Hillary Rengifo Universidad Central del Ecuador, Quito, Ecuador https://orcid.org/0009-0005-3770-7143
Renato Haro Universidad Central del Ecuador, Quito, Ecuador https://orcid.org/0000-0003-3889-5332
Jorge Espinosa Marín Universidad Central del Ecuador, Quito, Ecuador https://orcid.org/0000-0002-7924-7502
Wllintong Bastidas Universidad Central del Ecuador, Quito, Ecuador https://orcid.org/0000-0002-7167-4518
John Ramirez Avila Watersheds and Water Quality Research Lab. Rula School of Civil and Environmental Engineering, Mississippi State University, United States https://orcid.org/0000-0001-8166-0630
Javier Osorio Texas A&M AgriLife Research, Blackland Research and Extension Center, United States https://orcid.org/0000-0003-4573-4932

DOI:

https://doi.org/10.21138/GF.848

Abstract

The analysis of the hydrological response of watersheds has made the use of the Curve Number methodology relevant. However, the global application of this method has presented limitations mainly associated with the availability of land use and hydrology information for the study areas. The Global Curve Number map (GNC) is a tool that defines the value of the curve number of a region with a low spatial resolution (250 m) and its validation is necessary in the development of research related to water resource management in watersheds with limited information. The present study determined the representative curve number value in three micro-watersheds contributing to the Pisque River in North Ecuador. Curve number values proposed by the GNC for these micro-watersheds were compared with curve number values obtained for land use scenarios for the years 1986 and 2013, generated through the analysis of maps derived from satellite images. The geographic land use and vegetation cover was obtained through principal component analysis and validated using the confusion matrix method and the kappa index. The proposed land cover classification had a high accuracy (82 - 84 %) when compared with secondary reference information, which represents high reliability in the curve number maps generated for the study area. The models developed for the three micro-watersheds present greater detail and spatial resolution, maintaining an excellent fit with the CNG which is reflected in the goodness of fit statistics (NSE = 0.96 - 0.98, PBIAS = 13.06 - 19.03 and RMSE = 18.94 - 22.21).

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Published

2024-12-31

How to Cite

Rengifo Montúfar, H., Haro, R., Espinosa Marín, J., Bastidas, W., Ramirez Avila, J. ., & Osorio, J. (2024). Validation of the Curve Number method in three tributary sub-watersheds of the Pisque River in Ecuador. GeoFocus. International Review of Geographical Information Science and Technology, (34), 63–87. https://doi.org/10.21138/GF.848

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Issue

No. 34 (2024)

Section

Artículos

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