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Geoprocessing Applied in the Estimate of Infiltration and Surface Runoff in HPP’s Contribution Watershed

Journal of Geographic Information System 2021年第6期13卷 643-659页

作者： Elizon Dias Nunes Patrícia De Araújo Romão Maurício Martines Sales Marta Pereira Da Luz Institute of Socio-Environmental Studies Federal University of Goiás Goiania Brazil School of Civil and Environmental Engineering Federal University of Goiás Goiania Brazil Eletrobras Furnas Aparecida de Goiania Brazil Polytechnic School Pontifical Catholic University of Goiás Goiania Brazil

The knowledge of the hydrological regime contributes to the prediction of periods of higher or lower water supply as a function of the frequency and volume of rainfall in relation to the pedological, land cover, and land use conditions. This work aims at evaluating the spatio-temporal variability of the infiltration and runoff potential of an area formed by 4 sub-basins tributary to the São Marcos River in Cristalina (GO). The SCS/NRCS-USDA (2004) method was used, using geoprocessing resources, considering soils in dry, semi-humid and humid conditions. The estimates indicate that rainfall with an average of 6.83 mm, in the September-October transition, in the face of soils in the dry condition does not provide surface runoff. Thus, the variability of pedological characteristics associated with the various conditions of coverage and land use indicates that even the areas with lower infiltration potential begin to contribute effectively with their respective channels in the transition from October to November, when rainfall events are more frequent and significant, and the soils are already in conditions of greater humidity.

关键词： rainfall height Runoff Coefficient Hydrological Behavior

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