METHODOLOGY PROPOSAL FOR ENVIRONMENTAL IMPACT ASSESSMENT CAUSED BY FOREST OPERATIONS

Proposición y Aplicación de una Metodología de evaluación de Impactos Ambientales Generados por Operaciones Forestales


Miguel Henry Osorio

 

This study proposes a methodology to quantify the environmental impacts of forest operation based on the synthetic distance P2 (DP2) indicator. This indicator integrates a number of qualitative and quantitative variables related to debris management, skid trails, landings, streams, harvested areas and the percentage of exposed mineral soil.

A sample of 43 sites located in the land properties of the following companies: Forest Company 1, Forest Company 2, Forest Company 3, and Forest Company 3, from Chile, were assessed since November 15th to December 24th 1998 according to environmental guidelines.

As from the environmental evaluation method proposed (DP2) a sustainability value as objective as possible was obtained for each of the evaluated sites, that is to say, a vector of a synthetic indicators, which made possible to carry out spatial compares among the sites and the companies, with the purpose to assess its environmental behavior. Beginning with the vector of synthetic indicators DP2 an explanatory model was obtained, which allows to obtain an environmental sustainability value in any site.

According with the results, the highest value of the DP2 was 34,81 in site 31, because of the great alteration of the buffer zone by excessive traffic of harvest equipment. On the other hand, the company number 2 had the lowest environmental behavior due to the high values of DP2 registered. However, the company number 3 was nearest to the waited objective (ideal condition). Finally, of the set of variables considered the most relevant, that is to say, the ones that obtained a greater level of non conformity where those variables related to stream.

 


* Tésis disponible en la Biblioteca de la Universidad Austral de chile