The study measured sedimentation rates in the Corumbatai River basin in Brazil using 210Pb measurements. The researchers found that sediment accumulation rates varied between 406 and 1014 mg cm -2 year -1 in secondary drainage lines, and 546 mg cm -2 year -1 in the main river. This resulted in average sedimentation rates of 3.1 to 16.2 mm year -1, with the highest rate in an area with significant sediment accumulation. These findings are important for managing water resources in the basin, especially for cities like Rio Claro that rely on surface water for drinking.