MULTITEMPORAL ANALYSIS OF THE SOIL COVER IN THE INFLUENCE AREA OF THE PCH –

The objective proposed by the study was to map and analyze the spatial changes of the soil cover of the influence area of the Small Central Hydroelectric power plant (Pequena Central Hidrelétrica - PHC) – S o Sim o, Alegre ES. The images were processed with the support of SPRING 5.1.6 and classified by using the algorithm Bhattacharya, from its two images of high suborbital definition (Ortofoto /2007) and orbital (Geoeye/ 2009) which retracted the periods that come before and after the referred Substation construction. Six thematic classes were defined. The Supervised Classification Battacharya, demonstrated being a good instrument to evaluate the alterations of the soil cover. Comparison of the data, we can see that there was a significant increase in pasture class with 17.38%, followed by the class water corps with 3.54% and 3.46 with rocky material. Had significant reduction class remnants of natural vegetation with 22.30%, followed by non-road - paved with 1.30% and 0.78% with exposed soil. The use and occupation of the soil on the places nearby the area of study, remains being covered by pasture (69.55%) in 2009, and a good part of the vegetation cover was reduced to pasture. The construction of the PCH- S o Sim o favored for increasing rural exodus in neighboring community to the enterprise.