Modificações do código florestal e seus efeitos nos recursos hídricos : microbacia hidrográfica do rio Caiabi

Abstract

Studies related to watershed management are essential for building sustainable development strategies, as the hydrologic cycle in watersheds is influenced by the different forms of use and occupation of land. Thus the aim of this study is to compare the changes take effect in changing the forest code and its influence on the dynamics of water resources. The study was conducted at the micro basin of the river Caiabi in the mid north of the state of Mato Grosso, and the classification process and analysis of the properties was carried out by interpretation of satellite images. Compared to the legislation the permanent preservation areas in riparian areas were maintained, but the areas for legal reserve undergone changes and the new Forest Code (Law nº12.651 / 2012) demonstrated the potential for damage to water resources mainly for smallholdings because they are not bound to recover the legal reserve. When maintained forest areas protected by law in the watershed limits the potential volume to infiltrate was 64.51% higher than that found with the existing situation, decreasing the resilience of the watershed.