MODELING THE EFFECTS OF WOOD AND NON-WOOD BASED INDUSTRIES ON FORESTRY RESOURCES

摘要

Pollution due to the wood and non-wood based industries is one of the main reasons for the depletion of forestry resources. On the onset of industrial era, the number of industries was less but now it has increased much due to rapid pace of development. Industrialization affects forestry resources in two ways: (i) using raw materials by wood based industries and cut down by non-wood based industries and (ii) emitting pollutants by wood and non-wood based industries. In view of this, in this paper, we have proposed and analyzed a mathematical model to assess the effects of wood and non-wood based industries on the depletion of forestry resources. In the modeling process, it is assumed that wood and non-wood based industries deplete the forestry resources directly, whereas pollutants emitted by both types of industries decrease the growth rate of forestry resources indirectly. The equilibria are obtained and their stability is discussed. The model analysis reveals that forestry resources decrease due to the growth in wood based industries but the overgrowth in non-wood based industries and pollutants emitted by them in the environment adversely affect the forestry resources. Numerical simulation is provided to support analytical findings.