Résumé:
The objective of this paper is to calculate a parameter to stimate the value of
parcels considereted as ecological reserves by legislation, in function of the drainage
density, from a determined region. The area of 7.803,00ha localizated in Mogi-Guaçu, SP,
was divided in three parcels, getting a 26,46% of ecological reserves on a total area, with a
high drainage density. In the remained parcels, with a predominance low and medium
drainage density, was obtained 19,03% and 19,71%.