CARACTERIZAÇÃO DA MICROBACIA URBANA DO CÓRREGO BANDEIRA – CAMPO GRANDE/MS: SUAS IMPLICAÇÕES NO LAGO DO AMOR

Abstract

In recent years, anthropogenic activities in the Bandeira Creek micro-basin, within the urban perimeter of Campo Grande - MS, have led to excessive surface runoff, resulting in sedimentation and, consequently, flooding in streets near the watercourse and overflow of Lago do Amor. This study aimed to characterize the drainage influence area of Lago do Amor based on topographic variables and morphometric analysis. The research employed geoprocessing and remote sensing techniques to understand the runoff dynamics of the Bandeira Creek micro-basin, the lake’s main tributary, and assess the impacts of urbanization on the drainage system. Using topographic data from ALOS Palsar satellite imagery, variables such as altitude, slope, and slope curvature were calculated, along with morphometric parameters like watershed area, form factor, and runoff time. Results indicated that the lake’s drainage area has an elongated and irregular shape, with low drainage density, suggesting good runoff capacity under normal conditions but with potential risks of flooding and sedimentation exacerbated by soil sealing in urbanized áreas such as the Rita Vieira neighborhood. The paving of the neighborhood’s streets, completed in 2022, reduced sediment input into the lake but increased the speed and volume of runoff flows, leading to overflow at Lago do Amor during intense rainfall events. The analysis of rainfall events from 2021 to 2023 revealed changes in the region’s hydrodynamic behavior, with reduced sedimentation rates but a significant increase in flow rate, particularly after soil sealing in the Rita Vieira neighborhood. This study highlights the importance of adequate urban planning to prevent negative impacts on water systems. The data obtained provide essential support for environmental planning and management in the area, contributing to risk mitigation and the promotion of water sustainability in the Lake of Love region.