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A área de estudo corresponde à bacia do alto curso do rioItiquira, totalizando 5.361km2. Nesta área foi feito o estudoda dinâmica ambiental com emprego de técnicas SIG e imagensde satélite dos anos de 1966, 1985 e 1996. A análise dadinâmica ambiental envolveu o estudo das modificações nouso e ocupação do solo nos 30 anos considerados, mostrandoque a bacia do rio Itiquira sofreu grande impacto no uso eocupação do solo no período compreendido entre 1966 e1996. Em 1966, as áreas de vegetação natural (matas e cerrados)ocupavam 90,64% do total da área, reduzindo-se para60,57% em 1985 e para apenas 36,66% em 1996. Nesseprocesso, 289.382ha, de um total de 485.928ha de coberturavegetal natural, foram perdidos como tal. Em 30 anos houveum aumento de 313.725ha de terras cultivadas,correspondendo a cerca de 113 vezes a ocupação de terrasdo ano de 1966 (2.798ha).Dynamics of soil occupation of the river Itiquira basin,Mato Grosso, BrazilAbstract The study area corresponds to the basin of the Itiquira riverhigh course, totalling 5,361km2. In this area a study of theenvironmental dynamics was made, applying SIG techniquesand satellite images of the years 1966, 1985 and 1996. In1966 the areas of natural vegetation (forests and groves)occupied 90.64% of the total of the area, which was diminishedto 60.57% in 1985 and to only 36.66% in 1996. In this process,289,382ha of a total of 485,928ha of natural vegetal coveringhad been lost. At the same time, the agrarian surfaces(agriculture and pasture) that occupied only 0.52% of the totalarea in 1966, increased to 34.89% in 1985 and to 59.04%in 1996. In 30 years there was an increase of 313,725ha ofcultivated lands, corresponding to about 113 times the landoccupation of the year of 1966 (2,798ha). The areas classifiedas urban show a gradual increase since 1966, from 39ha in1996 to 58ha in 1985, and to 178ha in 1996. The other classesof soil use and occupation (reforestement areas,uncovered and affected by fire and humid areas) added weresmaller than 4,27% in 1996

DINÂMICA DA OCUPAÇÃO DO SOLO DA BACIA DO RIO ITIQUIRA, MATO GROSSO, BRASIL