Abstract

DIAZ CARVAJAL, Ángel  and  MERCADO FERNANDEZ, Teobaldis. Determination of curve number in Betancí subwatershed (Córdoba, Colombia) through remote sensing and GIS. Ing. Desarro. [online]. 2017, vol.35, n.2, pp.452-470. ISSN 0122-3461.

The runoff behavior in a watershed can be characterized through the curve number (CN), which is determined with field information about soil and cover. Remote sensing was used to establish the soil covers, while the geographic information system (GIS) allowed to generate a hydrologic soil group layer and combine data to produce a curve number map. In Betancí subwatershed the grass covers 85% of the total area and 83% of soils have a high runoff potential. For this reason, major part of the ground has a CN between 81 and 86. These conditions make runoff greater than infiltration and tend to increase the erosion process, flood and the desertification. As a result, it is recommended to study evolution term of the curve number and to extend its use to another areas of the Córdoba department.

Keywords : HGS; runoff; soil cover.

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