| Texto completo | |
| Autor(es): |
Oliveira, Paulo Tarso S.
[1, 2]
;
Nearing, Mark A.
[1]
;
Moran, M. Susan
[1]
;
Goodrich, David C.
[1]
;
Wendland, Edson
[2]
;
Gupta, Hoshin V.
[3]
Número total de Autores: 6
|
| Afiliação do(s) autor(es): | [1] USDA ARS, Southwest Watershed Res Ctr, Tucson, AZ - USA
[2] Univ Sao Paulo, Dept Hydraul & Sanit Engn, Sao Paulo - Brazil
[3] Univ Arizona, Dept Hydrol & Water Resources, Tucson, AZ 85721 - USA
Número total de Afiliações: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | WATER RESOURCES RESEARCH; v. 50, n. 9, p. 7100-7114, SEP 2014. |
| Citações Web of Science: | 50 |
| Resumo | |
We assess the water balance of the Brazilian Cerrado based on remotely sensed estimates of precipitation (TRMM), evapotranspiration (MOD16), and terrestrial water storage (GRACE) for the period from 2003 to 2010. Uncertainties for each remotely sensed data set were computed, the budget closure was evaluated using measured discharge data for the three largest river basins in the Cerrado, and the Mann-Kendall test was used to evaluate temporal trends in the water balance components and measured river discharge. The results indicate an overestimation of discharge data, due mainly to the overestimation of rainfall by TRMM version 6. However, better results were obtained when the new release of TRMM 3B42 v7 was used instead. Our results suggest that there have been (a) significant increases in average annual evapotranspiration over the entire Cerrado of 5115 mm yr(-1), (b) terrestrial water storage increases of 116 mm yr(-1) in the northeast region of the Brazilian Cerrado, and (c) runoff decreases of 7211 mm yr(-1) in isolated spots and in the western part of the State of Mato Grosso. Although complete water budget closure from remote sensing remains a significant challenge due to uncertainties in the data, it provides a useful way to evaluate trends in major water balance components over large regions, identify dry periods, and assess changes in water balance due to land cover and land use change. (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 |