Resumo

CORDOVA GUTIERRES, Daniela; PAREDES MENDEZ, Diego  e  ALULEMA DEL SALTO, Rafael Alberto. Determinación del parámetro hidrológico número de curva en la cuenca de la quebrada El Batán, usando sistemas de información geográfica y percepción remota. Figempa [online]. 2017, vol.3, n.1, pp.31-41. ISSN 2602-8484.  https://doi.org/10.29166/revfig.v1i1.53.

The Urban Drainage Modelling requires a great amount of basic information, for instance the analysis of surface runoff and infiltration. In order to obtain real data and reduce the degree of uncertainty in the results of the hydraulic model, in this research, a methodology was developed to determine surface runoff values based on the curve number method, by using geographic information systems (GIS), remote sensing and field surveys. This methodology was tested in the basin El Batán in the city of Quito-Ecuador. The Curve Number (NC) map was developed based on the combination of parameters such as land use, vegetation cover and soil hydrological groups (GHS); and the ground slope. Landsat, Rapideye and Ortofotos images were used for the mapping of vegetation cover and land use. Based on previous studies made in the urban area, the GHS map was generated, meanwhile for the natural zone infiltration some surveys were carried out by using the Müntz method and test pits. Subsequently these maps were subjected to reclassification, rasterization processes, and by map algebra of GIS, the CN map was obtained. The outputs of this research were: 22 types of land use, the values of NC in normal conditions of humidity for the natural zone is 67, while for the urban zone is 93. In addition, the runoff coefficients are 0.13 and 0.40 for the natural zone the urban area respectively.

Palavras-chave : basin el batán; the curve number; remote sensing; infiltration tests.

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