A influência do custo das barragens no preço da água

Abstract

The use of the environmental resources does not have its price recognized in the market and its economic value appears when its high use disturbs the society production and consumption (well-being) level. Regarding the water, the users do not pay by the caught volume. The current expenses related to the water are restricted to the catchment and watering. The actual laws institute the water use charging instrument. This fact refers to the water price studies, which is a hard task and still with few results. At Rio Grande do Sul, according to the Law N. 10350/94 orientation this value is linked to the actions previewed by the Basin Projects. This paper aims to play the water use value, considering Santa Maria River Basin, and its base is the estimative of the parcel related to the feasibility of dams building to provide the expansion of the rice crop, which is the main activity in the considered area. An economic analysis was accomplished using the interests practiced by this kind of structural building financial agencies, considering various horizons (number of parcels) to the building payment. The values practiced elsewhere the water use charging is occurring and the ones found in this research were compared. It was verified that the values were within a mean of practiced values in the rest of the country, like the ones charged at Ceará and also at Paraíba do Sul River Basin.