Soil erosion susceptibility in Bandeira watershed, Campo Grande – MS

• Autor(a) principal: Baloque, Givanildo Ferreira
• Data de Publicação: 2021
• Outros Autores: Capoane, Viviane
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista Cerrados (Montes Claros. Online)
• Texto Completo: https://www.periodicos.unimontes.br/index.php/cerrados/article/view/3789
• topic: Álgebra de mapas. Impactos da urbanização. Uso e cobertura da terra. Atributos do terreno.; Map algebra. Urbanization impacts. Land use and land cover. Terrain attributes.; Álgebra de mapas. Impactos de la urbanización. Uso y cobertura. Atributos del terreno.

The accelerated, disorderly, and unplanned urbanization of Campo Grande, since the 1960s, resulted in changes in hydrological and geomorphic processes, impacting terrestrial (erosion) and aquatic (sedimentation) environments. This work aimed to map the locations susceptible to soil erosion of the Bandeira watershed using map algebra, aiming to generate information that aid in environmental management decisions. To investigate how urbanization influences water erosion, topographic attributes Slope, Topographic Wetness Index, Topographic Sediment Transport Capacity Index and Stream Power Index were derived from a digital elevation model (DEM) with high spatial resolution; and land use and land cover classified from the NDVI of a Sentinel-2A image. The software employed were ArcGIS 10.8.1, SAGA GIS 7.7.0 and SNAP 8.0. Map algebra gave five susceptibility soil erosion classes: Very Low class corresponded to 10.63% of the watershed area, Low class, 33.85%, Medium Class, 45.82%, High class, 8.03% and Very High class, 1.68%. The main sources of sediment were unpaved roads with inexistent rainwater drainage systems; areas with urban voids; earthworks; and bank erosion. Reservoirs are the main sediment sink in the watershed.