| Full text | |
| Author(s): |
Luiz Felippe Salemi
[1]
;
Juliano Daniel Groppo
[2]
;
Rodrigo Trevisan
[3]
;
Gustavo Bicci Seghesi
[4]
;
Jorge Marcos de Moraes
;
Silvio Fronsini de Barros Ferraz
[6]
;
Luiz Antonio Martinelli
[7]
Total Authors: 7
|
| Affiliation: | [1] Universidade de São Paulo. Centro de Energia Nuclear na Agricultura. Laboratório de Ecologia Isotópica - Brasil
[2] Universidade de São Paulo. Centro de Energia Nuclear na Agricultura. Laboratório de Ecologia Isotópica - Brasil
[3] Universidade de São Paulo. Centro de Energia Nuclear na Agricultura. Laboratório de Ecologia Isotópica - Brasil
[4] Universidade de São Paulo. Centro de Energia Nuclear na Agricultura. Laboratório de Ecologia Isotópica - Brasil
[6] Universidade de São Paulo. Centro de Energia Nuclear na Agricultura. Laboratório de Ecologia Isotópica - Brasil
[7] Universidade de São Paulo. Centro de Energia Nuclear na Agricultura. Laboratório de Ecologia Isotópica - Brasil
Total Affiliations: 7
|
| Document type: | Journal article |
| Source: | Rev. Ambient. Água; v. 7, n. 3, p. 127-140, 2012-12-00. |
| Abstract | |
The Atlantic rain forest is the most endangered ecosystem in Brazil. Its degradation has started since 1500 when the European settlers arrived. Despite of all land use changes that have occurred, hydrological studies carried out in this biome have been limited to hydrological functioning of rain forests only. In order to understand the hydrological consequences of land-use change from forest to pasture, we described the hydrological functioning of a pasture catchment that was previously covered by tropical rain forest. To reach this goal we measured the precipitation, soil matric potential, discharge, surface runoff and water table levels during one year. The results indicated that there is a decrease in surface soil saturated hydraulic conductivity. However, as low intensity rainfall prevails, the lower water conductivity does not necessarily leads to a substantially higher surface runoff generation. Regarding soil water matric potential, the pasture presented higher moisture levels than forest during the dry season. This increase in soil moisture implies in higher water table recharge that, in turn, explain the higher runoff ratio. This way, land-use change conversion from forest to pasture implies a higher annual streamflow in pasture catchments. Nonetheless, this increase in runoff due to forest conversion to pasture implies in losses of biological diversity as well as lower soil protection. (AU) | |
| FAPESP's process: | 06/54292-9 - Study of the hydric balance and the biogeochemical balance of nitrogen in a first order microbasin with pasture cover on the north coast of the State of São Paulo |
| Grantee: | Luiz Felippe Salemi |
| Support Opportunities: | Scholarships in Brazil - Master |