| Texto completo | |
| Autor(es): |
Oliveira, P. T. S.
;
Nearing, M. A.
;
Hawkins, R. H.
;
Stone, J. J.
;
Rodrigues, D. B. B.
;
Panachuki, E.
;
Wendland, E.
Número total de Autores: 7
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF SOIL AND WATER CONSERVATION; v. 71, n. 5, p. 420-429, SEP-OCT 2016. |
| Citações Web of Science: | 11 |
| Resumo | |
The Curve Number (CN) method has been widely used to estimate runoff from rainfall events in Brazil; however, CN values for use in the Brazilian savanna (Cerrado) are poorly documented. In this study we used experimental plots to measure natural rainfall -driven rates of runoff under undisturbed Cerrado and under the main crops found in this region, and derive associated CN values from the measured data using five different statistical methods. Curve numbers obtained from the standard USDA Natural Resources Conservation Service (NRCS) table were suitable to estimate runoff for bare soil, soybeans (Glycine max {[}L.] Merr.), and sugarcane (Saccharum L.). However, CN values obtained from measured rainfall-runoff data (CN calibrated) provided better runoff estimates than the CN values from the standard table. The best CN values for the bare soil (hydrologic soil group B), soybeans, and sugarcane were 81.2 (78.5 to 83.9), 78.7 (75.9 to 81.5), and 70.2 (67.8 to 72.6). The CN method was not adequate to estimate runoff for the undisturbed Cerrado, bare soil (hydrologic soil group A), pasture, and millet (Pennisetum glaucum). (AU) | |
| Processo FAPESP: | 10/18788-5 - Balanço hídrico e erosão do solo em mata nativa do bioma Cerrado |
| Beneficiário: | Paulo Tarso Sanches de Oliveira |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 11/14273-3 - Balanço hídrico e erosão do solo em mata nativa do bioma cerrado |
| Beneficiário: | Luisa Fernanda Ribeiro Reis |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 12/03764-9 - Dinâmica do balanço hídrico e erosão do solo em área de cerrado |
| Beneficiário: | Paulo Tarso Sanches de Oliveira |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Doutorado |
| Processo FAPESP: | 15/05134-0 - Modelagem dos processos hidrológicos na região de cerrado |
| Beneficiário: | Paulo Tarso Sanches de Oliveira |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |