CAPACITY CHOICE OF DAMS UNDER RIVALRY USE AND EXTERNALITIES
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2014-10-30
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This paper studies the relation between optimal dam capacity and water management under rivalry uses and externalities. We extend the hydropower generation model, based on Haddad (2011), by including the competing use of water resource, non-linear building cost
of dam capacity and externalities in a welfare optimization model. We obtain the optimal dam capacity for multi-functional dams such as providing infrastructure for industrial and households water use, conjunctive use of hydropower generation and irrigation; storing water
in the wet season for use in the dry season, and mitigating áooding damages. The optimal solution shows that optimal dam capacity is characterized by the marginal benefits of hydropower generation, the marginal costs of flooding damages, and the constraining factors. Moreover, the optimal water management can be achieved by using derived seasonal prices in a decentralized manner.
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2014