HYDRAULIC-HYDROLOGICAL MODELING OF THE EFFECTS OF SUSTAINABLE SOLUTIONS ON THE DRAINAGE OF THE CANAL 4 URBAN SUB-BASIN, SANTOS-SP

Abstract

The intensification of climate change and urbanization aggravates drainage problems in coastal cities such as Santos-SP, due to soil impermeabilization and increasingly frequent extreme rainfall events. This study evaluates the feasibility of sustainable solutions, such as permeable pavements and rain gardens, in the Canal 4 sub-basin, using hydraulic-hydrological modeling in MIKE+. Rainfall, flow, topographic, and land-use data were employed, with calibration based on statistical metrics such as the Coefficient of Determination (R²) and Root Mean Square Error (RMSE). The results confirmed the effectiveness of these alternatives in reducing flood risks compared to the current system.