Deforesting in Ibiruba (RS), as analized from aerial photogrammetry
DOI:
https://doi.org/10.5902/2179460X24861Abstract
This work had as its main objective to evaluate deforesting in the Country of Ibirubá, Rio Grande do Sul, Brazil.
Aerial photographies from the years 1956 and 1975 enable to determine the reduction of forest áreas. The forest areas were interpreted and delineated upon such pictures. The photo-interpreted spots were later placed on base maps and three principal maps of forest were arrived at.
The measurement of the areas reveals that in 1956 there was 15,124 hectares covered by forest, or 19.4% of the Country. In 1965 these values had been lowered to 11,766 hectares 15%. In 1975, the forest cover was calculated to be just 7,792 hectares which corresponds to 10.4% of the Country.
In the areas of intense agricultural activity almost total reduction of the forests was observed, including those banks of rivers and riverheads. In then most steepes regions exploitation of forests was verified without, however, total withdrawal of the forest.
There has been large deforesting in Ibirubá (RS), considering the original forest cover. Such forest was calculated as 77% of the Country, consisting mainly of high quality Araucária angustifolia.
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BATTISTELA, V. História de Taperoa. Campo Real, Impressão Gess, 1972. 233 p.
BAUER, F.W. Waldbau als wissenschaft. Munchen Basel Wiene, BLV Verlagsgeselschaft, 1962. 182 p.
BRASIL. Instituto Nacional de Colonização e Reforma Agrária. Secretaria da Agricultura do Rio Grande do Sul e Faculdade de Agronomia da UFRGS. Levantamento e utilização agrícola dos solos do Município de Ibirubá. Porto Alegre, Mimeografado,1970. 70 p.
BRASIL. Instituto Nacional de Colonização e Reforma Agrária. Levantamento e avaliação de recursos naturais, sócio-econômicos e institucionais do Rio Grande do Sul. Brasilia, 1973. 6 V.
BRASIL. Ministério da Agricultura - Instituto Brasileiro de Desenvolvimento Florestal. Distrito Florestal. Brasília, 1975. 210 p.
HUECK, K. As florestas da América do Sul. São Paulo, Editora da Universidade de Brasília e Ed. Polígono, 1972. 466 p.
LINDMAN, C.A.M. & FERRI, M.G. A vegetação no Rio Grande do Sul. Belo Horizonte, Ed. Itatiaia e Ed. da USP, 1974. 377p. (Tradução em 1906 por Alberto Löfgren, Porto Alegre. Original Sueco, 1900. Ampliada por Ferri).
MORENO, J.A. Uso da terra, vegetação original e atual do Rio Grande do Sul. Boletim Geográfico do RGS. Porto Alegre, 17(15): 45-51, jan./dez. 1972.
RAMBO, B. A. A fisionomia do Rio Grande do Sul. 2. ed. Porto Alegre, Livraria Selbach, 1956. 475 p.
RAMBO, B.A. A imigração da selva higrófila no Rio Grande do Sul. Itajaí, Anais Botânicos, 3. Herbário "Barbosa Rodrigues".
RÖHRIG, E. As condições florestais do Estado do Rio Grande do Sul. Reinhausen, R.F. Alemanha, Relatório 3401, Mimeografaeo, 1969. 45 p.
SERRA FILHO, R. et alii. Levantamento da cobertura vegetal natural e do reflorestamento no Estado de São Paulo. 2. ed. São Paulo. Instituto Florestal. Boletim Técnico, 1975. 53 p.
STRANDBERG, H.C. Aerial discavery manual. Trad. David Serrat Congest. Barcelona, Ediciones Omega, 1957. 278 p.
THORLEY, G.A. et alii. Forest lands: Inventory and assessment. In American Society of Photogrammetry. Manual of Remote Sensing. Falls Church, The American Society of Photogrammetry. V.2.Cap. 17, 1975. p. 1353-1426.
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