Abstract

WEBER, Juan Francisco  and  APESTEGUI, Laureana. Relation between the Parameters of the Kostiakov and Lewis-Kostiakov Infiltration Models, Cordoba, Argentina. Tecnol. cienc. agua [online]. 2016, vol.7, n.2, pp.115-132. ISSN 2007-2422.

Certain relationships between the parameters of the Lewis- Kostiakov infiltration model were found, calibrated based on the results obtained from a field measurement campaign in the city of Cordoba, Argentina. A portable rainfall micro-simulator was used as an instrument, designed and built by this workgroup as a better alternative to the double-ring infiltrometer. This equipment, which can be completely disassembled, defines a 1 m2 test plot, making it possible to generate rainfall intensities between 65 and 120 mm/h. The test sites were selected based on soil type and use. Different initial moisture conditions were considered. The measuring campaign was conducted over six months with between two and three tests per week. The values measured were digitalized and processed and accumulated infiltration curves and infiltration rates over time were generated. Based on these values, the parameters of the Kostiakov and the Lewis-Kostiakov (Mecenzev) infiltration models were fitted, which in themselves represent an original contribution to knowledge about the urban hydrology in this city. The graphing of the different relationships between the parameters indicated the existence of an empirical function which would enable reducing the number of parameters of the Mecenzev model to two, with an acceptable loss in the quality of the predictions. This relationship will improve the selection of infiltration parameters for the design of the urban hydrology in Cordoba, Argentina.

Keywords : Rainfall simulator; hydrologic measures; urban hydrology; Lewis-Kostiakov model; infiltration.

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