UM MODELO DINÂMICO DE RECURSOS EXAURÍVEIS: A INTERAÇÃO ECONÔMICA ENTRE ÁGUA E ENERGIA

Abstract

The problem of water multiple uses is approached via the formulation of an optimal control problem. The peculiarity in studying water as an exhaustible resource due to its multiple uses lays on the fact that it is used directly as an input for the production of nonenergetic consumption goods, as well as an input for another input (electric energy), which in turn produces nonenergy consumption goods again. One should have a gradual substitution of the energetic source that uses water as its input. The opportunity cost of water decreases with the increase of the energy price and with the substitutability among workers of the electric energy utilities that use water as an input, as well as among the ones of the nonenergy sector. The price of the water should be at least twice that of energy. The extra amount beyond this value would depend on the relationship between the cost of the companies that extract water for nonenergetic uses and that of the hydroelectric utilities. The companies dedicated to nonenergetic water exploitation should pay two rates, which should already be incorporated in the price of water, and used for different purposes. One of the taxes would be (...)