Modelo insumo-produto nas relações intersetoriais de água no Brasil.

Abstract

The input-output model is a theory widely used in the economy over the past two decades which has been applied to various areas of knowledge. Some researchers have used this concept to measure the economic relations associated with water demand for economy areas in with shortages of fresh water. In this work we have measured water relationship (direct and indirect form) from agricultural, industrial, commercial and public sectors for municipal, state and national levels in Brazil. In the Epitácio Pessoa Dan, the agricultural and commercial sectors showed a high percentage of direct water use of 88% and 71%, respectively, while the industrial sector is 97% as indirect consumption. For each one cubic meter increase of water demand, the industrial sector causes an additional water consumption in the agricultural sector of 27 m3. In the state of Paraíba, for each one cubic meter of water increase the industrial sector leads to an increase in agricultural sector of 8 m3. The agricultural sector showed high direct water consumption in all states of Brazil. The Northeast region is the largest water consumer with 35% of the total, while the highest water consumption in virtual form (indirect consumption) in Brazil is the industrial sector. In the industrial sector, for each one cubic meter consumed directly causes an additional national water consumption of 2 m3 while for the agricultural sector is 9 m3.