| Full text | |
| Author(s): |
Alexandre Marco da Silva
[1]
;
Marco Aurélio Nalon
[2]
;
Francisco José do Nascimento Kronka
[3]
;
Clayton Alcarde Alvares
[4]
;
Plinio Barbosa de Camargo
[5]
;
Luiz Antonio Martinelli
[6]
Total Authors: 6
|
| Affiliation: | [1] UNESP - Brasil
[2] Instituto Florestal - Brasil
[3] Instituto Florestal - Brasil
[4] USP. CENA - Brasil
[5] USP. CENA - Brasil
[6] USP. CENA - Brasil
Total Affiliations: 6
|
| Document type: | Journal article |
| Source: | Scientia Agricola; v. 64, n. 4, p. 325-335, 2007-08-00. |
| Abstract | |
Information about the land cover of a region it is a key information for several purposes. This paper aimed to elaborate land-cover maps using digital satellite images obtained in 1997 from seven watersheds (Piracicaba, Moji-Guaçu, Alto Paranapanema, Turvo Aguapeí, Peixe, and São José dos Dourados) located in the State of São Paulo, southeastern Brazil. Additionaly, this study evaluated the relationship between land-cover and slopes of the terrain of the seven watersheds. A third objective was to estimate the percentage of riparian vegetation currently remaining along the streams in a 30-meter width buffer zone. Three research questions were posed: i) What is the dominant land-cover of these watersheds? ii) Is the riparian vegetation well preserved in the 30m width buffer zone? If not, iii) what is the dominant land-cover in these areas and what would be the cost of recovering such areas? Pasture was the predominant land-cover, occurring in approximately 50% of the entire study area, while sugar cane (Saccharum officinarum) (14%) constituted the second most frequent land-cover. Approximately 50% of the area of the seven basins is considered flat (40%) or smoothly rolling (10%). The terrain only becomes hillier in the Piracicaba and Alto Paranapanema basins, where a little less than 50% have slopes higher than 8%. The total riparian buffer strip zone occupied an area equivalent to approximately 6,200 km². From this total, only 25% is preserved. Pasture is the main land-cover of the riparian buffer strip zone. (AU) | |
| FAPESP's process: | 99/05279-4 - Structure and Functioning of Meso and Micro-Scale Watersheds of the São Paulo State: Basis to Generate and Sustain Biodiversity |
| Grantee: | Luiz Antonio Martinelli |
| Support Opportunities: | BIOTA-FAPESP Program - Thematic Grants |
| FAPESP's process: | 00/12939-0 - Mapping of the cover and soil use in the hydrographic basins of the Alto Paranapanema Aguapeí, Peixe/Santo Anastácio and São José dos Dourados, based on satellite images |
| Grantee: | Alexandre Marco da Silva |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |