MULTITEMPORAL EVALUATION OF LANDSCAPE OF THE AREA OF ENVIRONMENTAL PROTECTION DOS MANANCIAIS DO CORREGO GUARIROBA, CAMPO GRANDE, MATO GROSSO DO SUL, POR MEIO DE IMAGENS DE SATELITES

The main source of surface water abstraction that supplies the city of Campo Grande, Mato Grosso do Sul, is a dam in the Guariroba stream. To preserve the water resources of the region, the Guariroba Water Sources Environmental Protection Area (Mananciais do Corrego Guariroba) was established in 1995. The objective of this study was to diagnose and quantify the loss of the native vegetation and its impacts on the landscape and reservoir occurred between 1984 and 2017, through digital processing and multi-temporal analysis of satellite images. In 1984 the region had 50.27% of Cerrado biome and after 10 years, was reduced to 9.25% reaching 18.23% in 2017. The results indicated that during the process of construction of the dam a significant withdrawal of native vegetation occurred, justifying the creation of the APA. This action resulted in an increase of the native vegetation, partially recovering the vegetation of the biome. The water bodies, represented mainly by the reservoir, besides some larger dams, occupied in 1984, 0.11% of the area and after the of the dam end (1987), 0.32% reaching 0.30% in 2017, indicating a negative variation in the size of the reservoir area and loss between 29.91% (2004) and 6.84% (2017) in the period studied, demonstrating a threat to the water storage capacity. The adopted study model allowed to distinguish the alterations in the landscape of the region, being a fundamental instrument to subsidize actions of preservation and maintenance of the water resources. KEY-WORDS: Environmental degradation; Erosive processes; Aggradation. A principal fonte de captacao superficial de agua que abastece a cidade de Campo Grande, Mato Grosso do Sul, e uma barragem no corrego Guariroba. Para preservar os recursos hidricos da regiao, em 1995 foi criada a Area de Protecao Ambiental (APA) dos Mananciais do Corrego Guariroba. O trabalho teve como objetivo diagnosticar e quantificar a perda da vegetacao nativa da APA e seus impactos na paisagem e reservatorio, ocorridos entre os anos de 1984 a 2017, por meio do processamento digital e analise multitemporal de imagens de satelite. Em 1984 a regiao possuia 50,27% de cobertura do bioma Cerrado e depois de 10 anos, foi reduzida para 9,25%, atingindo 18,23% em 2017. Os resultados indicaram que durante o processo de construcao da barragem, ocorreu uma significativa retirada da vegetacao nativa, justificando a criacao da APA. Esta acao resultou em um aumento da flora nativa, recuperando parcialmente a