Susceptibility to erosion in the Córrego Guariroba watershed, Campo Grande, Mato Grosso do Sul

• Autor(a) principal: Capoane, Viviane
• Data de Publicação: 2019
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Acta Brasiliensis (Online)
• Texto Completo: http://revistas.ufcg.edu.br/ActaBra/index.php/actabra/article/view/180

Water capture for domestic use for the city of Campo Grande consists of superficial springs and aquifers, of which the Guariroba reservoir is the main surface source. This study evaluated the susceptibility to erosion, and land use and cover in the Guariroba Stream watershed, in order to assist environmental management. Topographic attributes extracted from a digital elevation model obtained by photogram-metry were used to evaluate susceptibility to erosion. The normalized difference vegetation index (NDVI), obtained from Sentinel 2B images, was used for land use and land cover analysis. The topo-graphic attributes showed the most susceptible sites for the development of erosive processes, which are found along watercourses, drainage headwaters and convergent concave slopes. Here, the surface water flows have higher energy, consequently, their erosive power is greater, increasing the susceptibility to loss of sediment and adsorbed pollutants. The remaining natural vegetation is found in small fragments along the water course. Eucalyptus plantations encroach pasture areas, forming mosaics in the landscape. The generated maps can be used by administrators for the identification of priority areas for environmental recovery.