LEI 11284 DE 2006 PDF
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Figures 6 c and 6 dotherwise, show the same curves considering the scenario with differentiated weights among stands with 12184 for community use and biodiversity conservation. Figures 4 c and 4 d show results when weights are differentiated across stands with noncommodity use potential.
Third, it can be used to investigate the tradeoffs among market and nonmarket uses in terms of reduced timber revenues. As well-planned and executed harvesting on public lands is intended to replace illegal logging on these lands, this capacity estimate is a reasonable starting point for analysis until better data become available.
Baraloto for comments and suggestions. Every three years the interval represented byBrazilian law requires independent audits of concessionaire performance within the concessions.
However, as a result of diminishing returns from management effort for multiple activities within the same stand, landscape-scale multiple use planning is perhaps most efficient when each stand has a unique use [ 13 ]. The objective of this paper is to develop an analytical tool to support this decisionmaking.
Harvests are assumed to be performed from current logging centers.
The potential of each stand for each land use is assumed to be known and is denoted by. The volume harvested is constrained by the available merchantable timber volume in the forest and the milling capacity of the logging centers surrounding the public forest. For this reason, the objective function maximizes profits while lri land use leo into account. For simplicity, we assume that the growth and yield of the harvested forest would be sufficient to restore the same merchantable volume in each timber volume class within each stand at the beginning of the second cutting cycle.
lei 11284 de 2006 pdf file
Areas forbidden for logging were assigned for harvesting in the model. Figure 6 displays marginal opportunity cost MOC curves, which represent the cost of increasing one more percent of land use or one more point of cumulative score within FSF.
Due to the lack of suitable data, audit costs were assumed to be equivalent to certification audit costs, which vary depending on the size of the management unit. The Ldi Planning Optimization Model We begin by establishing the basic selective logging timber supply problem, where the decision variables determine the amount of volume per ha to harvest. These opportunity costs are not uniform across every management se. We drew upon previous lwi to estimate the spatially explicit profitability of logging [ 15 — 17 ].
Figure 6 b shows the same results for areas assigned to biodiversity conservation. Annual profits from logging in Faro State Forest for government and loggers with an increasing number of stands in nonlogging land uses harvested by current logging centers a or leii closer cities b ; annual profits from logging in Faro State Forest for government and loggers with an increasing cumulative score for biodiversity conservation c and for community use d. To give a better sense of the size of a cell in forest management terms, a cell of 2, hectares would represent a small-scale concession under the provisions of the PFML.
In the two multiple use scenarios investigated, the potential for logging was considered equal to 1 for any stand in which the estimate of logging profitability was greater than zero, and zero otherwise. In our study, we consider community use and biodiversity conservation as possible alternative uses. Figure 6 a depicts 112284 MOC as more stands are assigned to communities.
To support public forest planning efforts, we combine spatially explicit data on logging profits, biodiversity, and potential for community use for use within a forest planning optimization model.
The major challenge facing public planners now lies in allocating land across multiple uses to meet multiple objectives, often with little information about socioeconomic and biological conditions.
Lastly, as the Brazilian concession experience expands, more ve estimates of concession establishment costs, eli costs generated by the licensing of forest management plans, and audit costs will be available for the better accuracy of the model. The results show that concessions could represent an important source of funds for public agencies, relative to their current budgets. Same effect is valid for biodiversity conservation.
Logging in natural forests is a vital economic activity in the Brazilian Amazon. Brazil is 11284 ahead with its plan to establish a forest concessions system while trying to take full account of these experiences.
In the case of FSF, the decrease in the NPV caused by an increase in the proportion of the State Forest dedicated to community use is larger than the decrease caused by biodiversity conservation, ceteris paribus.
We begin by establishing the basic selective logging timber supply problem, where the decision variables determine the amount of volume per ha to harvest.
Lek model developed in this study is not intended to replace these efforts but, rather, by incorporating data generated from these surveys, given planners a method to easily visualize alternative planning landscapes.
Table of Contents Alerts. FSF is covered by dense forests and displays little evidence of use and human occupation in the extreme eastern and southern portions [ 14 ]. In this section, we report a series of results from the model applied to FSF. In the case of community use, we assigned to stands in which older forest fires were identified — a weight equal to two-thirds the weight assigned to stands indicating more recent forest fire activity — pei to 2 and 3, resp.
Figures 2 and 3 show what happens to the number of eli assigned for logging and harvested volume when logging is performed by firms located in the current logging centers Figures 2 a and 3 a and if mills move to closer cities Figures 3 a and 3 b. The curves traced out mainly Figures 5 a and 5 b due to the similar comparative scale are useful to assess the effects of nonlogging land use alternatives over the NPV generated by logging. Further research should include forest dynamics to better incorporate the long-term growth and yield of the harvested forests.
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For decisionmaking purposes, it is important to be able to estimate the royalty rate that permits the logging firm to just satisfy participation constraints. Although this work was reviewed by the United States Environmental Protection Agency and approved for publication, it may not necessarily reflect official agency policy.
Second, se draw upon harvest scheduling and tactical planning problems, such as the optimization of infrastructure e. Obviously, as the number of stands assigned to alternative land uses such as biodiversity conservation and use by communities is increased, the number of stands logged, timber volume harvested, and profits from logging decrease.
The datasets used span the entire Brazilian Amazon, implying that the analysis can be repeated for any public forest planning effort within the region. Brazilian regulations establish that management decisions 11824 each public forest will be guided by a management plan, which will be generated based on surveys in each public forest, including forest inventories, designated important sites for biological conservation and tourism, and the location and needs of traditional forest dwellers.
We simulated the production possibility frontier PPF and investigated the tradeoffs among different land uses for three scenarios using existing logging centers and also when the centers move to cities closer to FSF: The importance of this study is demonstrated in two ways.