Estudo da variação da área de preservação permanente do reservatório Orós-CE associada às alterações do código florestal

Abstract

The study of ranging permanent preservation areas of Orós reservoir, used the ArcGIS 10.2 software for computer modeling, the delimitation was carried out according to legal references of current environmental legislation, and the previous legislation, using altimetry reference established by current legislation, was used two altimetric elevations, the maximum maximorum quota of original project 1960, and a maximum maximorum quota statistically modeled from current rainfall data, using altimetry reference established by previous legislation was modeled one buffer of 100 meters measured from the maximum normal operating height, so it was possible to compare the restrictiveness or permissiveness of the legislation. Modeling maximum maximorum quota update to determine the area of permanent preservation of Orós reservoir was through statistical process using probability distributions, among which eight types were selected: Weibull three parameters, Minor Values Extremes, Weibull, Logistics, Normal, Gamma, lognormal and Largest Values Extremes. The performance of these distributions were evaluated by confidence level, this posted at 95% and the adherence by Anderson Darling method, highlighting the type distribution Weibull three parameters, which obtained the best overall performance, modeling a maximum maximorum quota of 208 meters, one meter above the established by the original project. Established the demarcation reference, began the computational modeling of the APPs, it was identified that the current legislation by reference to the maximum maximorum quota of the original project of DNOCS, is less restrictive than the previous legislation establishes an area 26% smaller that established by previous legislation, promoting changes as the territorial definition of the municipalities covered by the reservoir. Thus, APP gains were observed in some municipalities and other municipalities was observed loss of APP, the process does not occur homogeneously.