Previsão de erosão e demarcação de talhões para plantação de eucalipto na microbacia do Rio Itupeva (São Paulo), com base num sistema de informação geo-referenciada

AUTOR(ES)
DATA DE PUBLICAÇÃO

1998

RESUMO

The main goal in implementing fast growing forests in Brazil is to supply the increasing demand for wood-derived products. One of the sepecies most used for that purpose is the Eucalyptus, native of Australia, which shows good adaptation to the local climate as well as provides 2 or 3 cuts, depending on the applied management. In certain conditions Eucalyptus forests may cause erosion, either due to their natural susceptibility to some soil characteristics or due to management practices used for soil tillage, forest maintenance and cuts. Forestry companies have been changing their view on the subject and are becoming more worried about soil and water conservation, adopting watersheds as management units. This study was carried out on the Rio da Itupeva watershed, with an area of 2,169ha, within the Aguaí and Santo Antonio do Pinhal counties, in the São Paulo State. The Universal Soil Loss Equation (USLE) was used to determine critical areas, in terms of soil loss, simulating land use changes from the existing crops to Eucalyptus forest. Those critical areas were then associated to land use capacity classes in order to propose alternatives to field shapes and roads design, with the objective of minimizing impacts on the environment. In the first implementation, eucalyptus has shown to be very restrictive, considering the soil loss, with land use change from sugar cane and pasture causing the biggest impacts. In a second implementation, i.e. forestry in areas previously occupied by Eucalyptus, the soil losses where acceptable, within the tolerance limits established for each soil type

ASSUNTO(S)

erosão sistemas de informação geografica eucalipto

ACESSO AO ARTIGO

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